WarmySender - Cold email with built-in warmup | AppSumo

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WarmySender

Run cold email sequences backed by a 200M-contact B2B database, built-in warmup, and Bounce Shield

37 reviews

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License Tier 1:$49$179.88

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Carefully selected by AppSumo for quality, performance, and support

Your perfect cold email won't get any replies if your domain is getting flagged as spam. WarmySender can warm your domain, flag bad addresses, and run your sequences—all in one place.

TL;DR

At-a-glance

warmysender.com

Alternative to

Hunter.io, Lemlist, Lusha

Integrations

Gmail, HubSpot, LinkedIn, Salesforce, Zapier

Best for

Consultants, Marketing agencies, Sales managers

Price increases in

11 days

17

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29

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46

WarmySender

Send smarter cold email with a 200M B2B database

Price increases in

11

Days

:

17

Hours

:

29

Mins

:

46

Secs

Choose Plan

Launch cold email campaigns with a 200M-contact B2B lead database, built-in warmup, Bounce Shield, and A-Z testing

Sequences built for replies, not just sends

Deliverability protection that runs itself

Set it and forget it

Controls built for scale

Choose the plan that’s right for you

Feel secure in your purchase with AppSumo's60 day money-back guarantee.

##### License Tier 1
$49$179.88
Buy now
Lifetime access		 ##### License Tier 2
$119$449.70
Buy now
Lifetime access		 Recommended
##### License Tier 3
$229$899.40
Buy now
Lifetime access		 ##### License Tier 4
$399$1,798.80
Buy now
Lifetime access
Emails per month 10,000 25,000 50,000 100,000
Leads per month 1,000 3,000 10,000 25,000
Email verifications per month 800 1,200 2,000 12,000
Workspace(s) 1 2 3 5
Member(s) 1 3 4 5
Warmed mailboxes 10 25 50 100
Cold mailboxes 40 100 200 500
Email warmup
Multi-step sequences
MCP
A-Z testing
Unified inbox
Team collaboration
Analytics dashboard
Custom tracking domains
Bounce shield protection
API access
Pre-send spam score checker
Conditional branching
Visual sequence builder

Refundable up to 60 days

Covered by our

We Got Your Back guarantee

Deal terms & conditions

Open Deal terms & conditions

Lifetime access to WarmySender.

All future Pro Plan updates.

If Plan name changes, deal will be mapped to the new Plan name with all accompanying updates.

No codes, no stacking—just choose the plan that’s right for you.

You must activate your license within 60 days of purchase.

Ability to upgrade between 5 license tiers while the deal is available.

Ability to downgrade between 5 license tiers within 60 days of purchase.

\ See WarmySender](https://warmysender.com/?utm_source=appsumo)

Founded January 1, 2025

🇦🇪Dubai, United Arab Emirates

1-10

Growth

Bootstrapped

warmysender.com

We use PandaDoc to confirm each founder's identity.

Effortless email warmup and outreach

Hey AppSumo fam! 👋

We built WarmySender because hitting “send” on cold emails shouldn’t feel like tossing bottles into the ocean.

With our platform you can find laser-targeted leads from a 200 M-contact B2B database, warm up your inbox automatically to 99.4 % deliverability, and fire off high-converting sequences—all from one dashboard.

Prefer autopilot? Tell our AI agent what you sell in plain English and watch it spin up a full campaign, subject lines to follow-ups, in minutes. 🚀

We’re thrilled to launch on AppSumo and hand growth hackers, founders, and agencies the keys to predictable outreach.

Grab the lifetime deal, skip the spam folder, and start booking more demos today.

Let’s turn cold emails into warm relationships together! 🔥

M Numan H.

Founder

Questions & reviews

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Reviews37Questions48FAQs10From the founders4

Have a question?

Here you'll find a curated collection of frequent questions and answers, designed to provide you with quick, clear information about the product.

For all other questions refer to the questions tab

Helpful links

Open Helpful links

What features does WarmySender offer for email outreach?

Open What features does WarmySender offer for email outreach?

WarmySender provides a comprehensive suite of features for email outreach, including email warmup with a 99.4% inbox placement rate, multi-step sequences with A/B testing and conditional branching, a unified inbox for managing email and LinkedIn replies, smart throttling to protect sender reputation, an analytics dashboard for performance tracking, access to a 200M+ verified B2B lead database, A-Z testing with up to 26 variants, a spam score checker, and a visual sequence builder for campaign design.

How do I set up my first campaign in WarmySender?

Open How do I set up my first campaign in WarmySender?

To set up your first campaign in WarmySender, follow these steps: 1) Connect your email accounts (Gmail, Outlook, SMTP) and LinkedIn account. 2) Choose your plan (Pro, Enterprise, or Ultimate). 3) Create multi-channel sequences using the visual sequence builder. 4) Set daily sending limits to protect your sender reputation. 5) Launch your campaign and monitor performance through the analytics dashboard.

Is WarmySender compatible with different email providers?

Open Is WarmySender compatible with different email providers?

Yes, WarmySender is compatible with various email providers. It supports Gmail, Outlook, and any email provider that supports SMTP and IMAP protocols, including custom business email servers and managed hosting providers.

How does WarmySender's email warmup process work?

Open How does WarmySender's email warmup process work?

WarmySender's email warmup process involves sending emails that trigger multi-turn conversations, up to 5 replies deep, to simulate real engagement. This approach has resulted in a 99.4% inbox placement rate, as measured across 80,000+ warmup emails in Q1 2026.

What should I do if my LinkedIn account disconnects from WarmySender?

Open What should I do if my LinkedIn account disconnects from WarmySender?

If your LinkedIn account disconnects from WarmySender, it's recommended to reconnect your account promptly to ensure uninterrupted campaign execution. Detailed instructions for reconnecting your LinkedIn account can be found in the WarmySender Help Center.

Does WarmySender offer deliverability testing for emails?

Open Does WarmySender offer deliverability testing for emails?

Yes, WarmySender offers comprehensive deliverability testing features, including inbox placement testing, spam score analysis, authentication verification (SPF, DKIM, DMARC), and blacklist monitoring. These tools help identify and resolve potential deliverability issues before launching campaigns.

Can I manage multiple email accounts within WarmySender?

Open Can I manage multiple email accounts within WarmySender?

Yes, WarmySender allows you to connect and manage unlimited Gmail, Outlook, and SMTP mailboxes from a unified dashboard. It offers features like intelligent rotation, coordinated warmup, and per-mailbox health monitoring to optimize your email outreach.

Does WarmySender provide an API for integrations?

Open Does WarmySender provide an API for integrations?

Yes, WarmySender offers a REST API that allows integration with CRMs, automation platforms, and other tools. This enables actions such as pushing prospects from your CRM, exporting reply events to a data warehouse, and building opt-out webhooks.

How can I contact WarmySender support if I encounter issues?

Open How can I contact WarmySender support if I encounter issues?

If you encounter issues with WarmySender, you can contact their support team by emailing hello@warmysender.com. They typically respond to support requests within 24 hours during business days (Monday - Friday). For urgent issues, mention 'URGENT' in your email subject line.

Expected to respond within 24 hours

Dubai, United Arab Emirates

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112169872616142103284](/content/profile/112169872616142103284/index.html)

112169872616142103284

Sep 24, 2026

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Q: does all Tier in Appsumo has Linkedin Outreach included?

i have one important question to ask, if i buy tier 1 from appsumo, will it be also having linkedin outreach in it? if yes then whats the limit and can i also use the monthly 1000 credit for linkedin outreach?

Founder Team

Hello_WarmySender

Sep 24, 2026

A: Yes. LinkedIn outreach works on every tier, Tier 1 included, as an add-on seat for each LinkedIn account you connect, billed separately from your lifetime deal. The limits are per LinkedIn account and follow a safe pace: a new account starts at around 10 invitations a day and ramps up over 4 to 6 weeks, to about 150 invitations a week (roughly 22 a day) on a free LinkedIn account, or about 200 a week (roughly 29 a day) on Premium or Sales Navigator. Your 1,000 monthly leads work for LinkedIn too: turn on the "Has LinkedIn" filter in the Leads database, save those contacts to a list, and add them to a LinkedIn or multichannel campaign. The leads cover the contacts; the LinkedIn actions themselves don't use them. Full breakdown: https://warmysender.com/documentation/linkedin-sending-limits-and-account-tiers — The WarmySender Team

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104195017121316697770

You didnt reply the main questuion. Does any tier has Linkedin outreach included (without additional payment)

Founder

Hello_WarmySender

No, none of the AppSumo tiers include LinkedIn outreach. LinkedIn is an optional add-on for every tier: one seat per LinkedIn account you connect, billed monthly in the app, add or remove seats any time. Everything in your tier stays included: email warmup, cold email campaigns, the leads database and email verification. How seats work: https://warmysender.com/documentation/linkedin-seat-billing

pawtobelloroad](/content/profile/pawtobelloroad/index.html)

pawtobelloroad

Sep 24, 2026

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Q: AI connection

I connection to an AI platform required to use Warmy Sendr?

Founder Team

Hello_WarmySender

Sep 24, 2026

A: No, you don't need one. Everything in WarmySender works straight from the app: you connect your mailboxes, build and launch campaigns, run warmup and verify emails yourself, with no AI account required. Connecting an AI agent is an optional extra, included with every paid plan, lifetime tiers too. If you'd like it, Claude, ChatGPT, Cursor, Codex, OpenClaw, Hermes Agent or any agent that speaks MCP can build, launch and manage your campaigns in plain language, while WarmySender's scheduler still keeps every account inside safe sending limits. Setup guide: https://warmysender.com/documentation/connect-your-ai-agent — The WarmySender Team

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112169872616142103284](/content/profile/112169872616142103284/index.html)

112169872616142103284

Sep 24, 2026

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Q: Can we use Gmail for warmup and outreach?

for example if i make a new gmail accound can i add up in warmup sequence and after 3-4 weeks can i do cold emiling through it? usinf warmysender?

Founder Team

Hello_WarmySender

Sep 24, 2026

A: Yes, that's exactly how to do it. Connect the new Gmail account with an App Password (Google asks you to turn on 2-Step Verification first), switch on warmup, and WarmySender starts it with just a few warmup emails a day and ramps up gradually. Around week 3 you can begin cold campaigns at about 10 emails a day, grow slowly from there, and keep warmup running underneath. For a free @gmail.com address we recommend staying around 20 to 30 cold emails a day; for more volume, a Google Workspace mailbox on your own domain is a stronger foundation, and you scale by adding mailboxes rather than pushing one harder. Week-by-week guide: https://warmysender.com/documentation/how-many-cold-emails-can-i-send-per-day — The WarmySender Team

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NareshRavula](/content/profile/NareshRavula/index.html)

NareshRavula

Sep 24, 2026

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Q: Migrating from Other email service providers to Warmysender and vice versa

Hi Team,

I have few questions:

1. Does your platform support migrating email conversations from warmysender to other tools and other tools to warmysender?

2. How does the platform handles the tracking, analytics, unsubscribe features with in the platform?

3. can we upload unlimited email contacts through csv or is there any limit on number contacts upload as well?

4. Can we connect this system with other CRM's such as GoHighLevel?

Founder Team

Hello_WarmySender

Sep 24, 2026

A: Hi Naresh! Short answers to all four. 1) Your email conversations live in your own mailbox, which you connect to WarmySender, so the full history stays in your inbox whichever tool you use. Contacts move by CSV both ways: any CSV imports (extra columns become merge tags), and you can export your contacts to a CSV that re-imports cleanly. Sequences from another tool aren't imported automatically, so you rebuild those here. 2) Open and click tracking can be switched on or off per campaign, and your own opens are left out of the stats. Every campaign email carries an opt-out line automatically (a link, or a "reply to opt out" line if you prefer), and anyone who opts out goes onto your suppression list so they aren't emailed again. 3) What's limited is how many contacts you store: 25,000 on Tier 1, 50,000 on Tier 2, 100,000 on Tier 3, 300,000 on Tier 4 and 500,000 on Tier 5. 4) There's no built-in GoHighLevel app, but you can connect it, or any CRM, through our REST API and real-time webhooks (replies, bounces, unsubscribes), directly or via Zapier, Make or n8n. Details: https://warmysender.com/docs/integrations — The WarmySender Team

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Alex110](/content/profile/Alex110/index.html)

Alex110

Sep 21, 2026

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Q: Does this work for agencies?

Hello, does WarmySender work for Cold Email agencies? I am planning to have 5-10 clients, and want to send emails for each client daily. Also, can domains and inboxes (email addresses) be purchased within WarmySender? Thanks!

Founder Team

Hello_WarmySender

Sep 21, 2026

A: Yes, WarmySender works for cold email agencies, and running 5 to 10 clients that each send every day is a normal setup. Give each client its own workspace: that client's mailboxes, campaigns, prospects and replies stay separate, and you move between clients with the workspace switcher. The number of workspaces and team members depends on your license tier: Tier 1 has 1 workspace and 1 member, Tier 2 has 2 and 3, Tier 3 has 3 and 4, Tier 4 has 5 and 5, and Tier 5 has 8 and 8. For 5 to 10 clients, Tier 4 covers five client workspaces and Tier 5 covers eight; beyond eight, clients would need to share a workspace and be kept apart by campaign. Your connected-mailbox limit and monthly sending allowance belong to your account and are shared across all of your workspaces (for example, Tier 4 allows up to 500 connected mailboxes and 100,000 cold emails a month in total). Domains and inboxes: no, WarmySender does not sell domains or mailboxes. Buy the domains from any domain registrar and the mailboxes from an email host such as Google Workspace, Microsoft 365, Zoho or any provider that gives you SMTP and IMAP, then connect them under Mailboxes, Add Mailboxes, where the Bulk (CSV) tab connects dozens at once. You can also run client campaigns from an AI agent (Claude, ChatGPT, Cursor, Codex, OpenClaw, Hermes Agent or any agent that speaks MCP) in plain language, while the scheduler keeps every mailbox inside safe sending limits no matter who is driving. Connecting guide: https://warmysender.com/documentation/connecting-mailbox — The WarmySender Team

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Alex110

That's great. Thank you so much for your detailed reply.

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'Customers appreciate WarmySender for its seamless integration of email warm-up, lead management, and outreach campaigns in one platform. The built-in warmup, 200M-contact B2B database, and Bounce Shield feature are the top highlights. Some users have noted minor limitations in the B2B database coverage and daily lead-saving limits. With an impressive 4.9 rating and positive user feedback, WarmySender is a solid buy for those in need of a comprehensive cold email solution. Plus, with a 60-day money-back guarantee, it's worth giving it a try.'

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29f27b6a40d64374a8730bbd148a5ea0 PLUS

Verified purchaser

Deals bought: 109Member since: Oct 2017

Sep 6, 2026

Looks good overall

I’ve only just started using this platform, so it’s too soon to give a full assessment. So far, I’ve interacted with two sections: Warmup and Leads.

In the Warmup section, I could easily add the email address I wanted to warm up. There are also multiple warmup strategies and options that I haven’t seen on other platforms, including options for new domains, new mailboxes, reactivating dormant mailboxes etc. It also features a neat dashboard that shows warmup stats and progress.

The Leads section, however, might need some rework. The filtering options and the data itself look good on the surface, but I encountered a few issues.

First, I couldn’t find a way to save my custom filter settings. Second, when I first used the Leads section, “verified emails” was one of the filtering options, but that option is now missing. Third, although the monthly allowance is 1000 leads for the basic plan, you can only save 33 leads per day, apparently based on spreading the allowance across 30 days. But what if your mailbox is already warmed up and you want to use all 1,000 leads starting today?

Another issue is that the daily limit remains fixed. If you skip a day or two, the number of leads you can save per day doesn’t increase to account for the unused allowance, it stays at 33. I’m not sure whether this means that, if I waited until the last day of the month to use my allowance, I’d only be able to save 33 leads instead of the full 1,000. That’s a point of friction I hope they’ll address and fix.

I’ll update my taco rating as I continue exploring the platform and trying out other features. For now, my experience has been neutral, not too good, but not too bad either. The tool does look promising, though.

Update 09/08/2026:

Firstly, I want to thank you for taking the time to respond to each of the points I raised in my review; I appreciate it.

I also appreciate that you've implemented the "Saved Filters" feature, that'd definitely help save a lot of time. Especially since my ICPs fall in all other states except CA and TX, it's easier to just save the filter instead of doing it all over again every time I want to save leads.

Might I also suggest a "Select All"/"Deselect All" option in the combo boxes within the filter? That'd help select or deselect options en masse, after which users can individually select or deselect the ones they don't want.

Regarding "the daily pace": That one still sticks out like a sore thumb, especially since it feels like you are promising 1000 leads per month on the basic plan but are underdelivering if users choose not to save leads every single day. So I'd humbly urge you to reconsider your stance on the daily allowance and at least make it possible for users to save the entire 1000 leads within the month, even if not all at once.

Update 09/13/2026:

Updating my review to highlight how professional and quick their support has been and the fact that they are making improvements to the platform, I can definitely support that. Thank you for this tool.

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Founder Team

Hello_WarmySender

Sep 7, 2026

Thank you for such a detailed first look — and for the kind words on warmup; the strategy options for new domains and dormant mailboxes are something we're proud of, so it's good to hear they land.

On Leads, three straight answers:

Saved filters — this one's live as of today. Set your filters, hit "Save filters", give the set a name, and it's in the Saved filters menu (bookmark icon) for one-click reuse — rename and delete from the same menu. Your review moved it to the front of the queue, so thank you.

The "verified emails" option — we retired it on purpose. That label came with the data rather than from a live check, so it wasn't something to build a send on. The reliable route is: save your list, then run it through the built-in Email Verifier before you launch — and Bounce Shield checks every address again right before it goes out. That's the combination that actually protects your inbox placement.

The daily pace — you've read it right: your monthly allowance is spread evenly across the month (1,000 a month works out to 33 a day), and unused days don't bank. That's by design — it keeps the database sustainable for everyone, and it's the same rhythm we use for sending. If you've got a warmed inbox and want to move faster, lead credits are built for exactly that: they skip the daily pace and never expire, so you can pull your whole list today. Searching is free, and re-saving a lead you already have is free too. Full detail: https://warmysender.com/documentation/lead-credits-and-daily-limits

We'd love the chance to earn the rest of those tacos as you get into campaigns and the verifier. Anything else that feels off, reply here or email hello@warmysender.com and we'll look at it with you.

Everything's documented at https://warmysender.com/documentation — you can paste any page into ChatGPT or Claude if you'd rather just ask.

— The WarmySender Team

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link_m PLUS

Verified purchaser

Deals bought: 76Member since: Feb 2018

Sep 3, 2026

Bought this on day one and it's earned its spot in the stack

I run a web/SEO agency and do outreach for both my own pipeline and client campaigns, so mailbox health isn't optional — it's the whole ballgame. I've been using WarmySender for warm up, cold campaigns, and pulling/verifying leads.

**What I like:**

- **Warmup actually works.** Inbox placement on my sending domains improved over the first few weeks instead of the usual slow slide into promotions and spam.

- **Three tools in one.** Warmup, campaign sending, and a lead database with built-in verification. Cleaning contacts before they hit a sequence means fewer bounces and less reputation damage — normally that's two or three separate subscriptions.

- **Health and throttle visibility.** When a campaign slows down, I can see which limit is capping it rather than guessing.

- **MCP/API access.** I can wire it into my own automations instead of living in a dashboard. Big deal for how I work.

- **Lifetime deal value.** Comparable stacks run well into three figures a month.

**What could be better:**

- **LinkedIn and WhatsApp outreach cost extra.** This is my main gripe. Multi-channel is a big part of the pitch, but those channels sit behind an additional monthly fee *plus* a one-time integration charge on top of what you already paid. If multi-channel is core to the product, it shouldn't be a second paywall.

- **No way to test them first.** No trial or free tier on the add-on channels, so you pay upfront and monthly to find out whether they work for your use case. On channels where account restrictions are a real risk, that's a lot to ask on faith. Even a limited free tier — a handful of connections a day for two weeks — would let people validate before committing.

- **The pricing model isn't explained.** A one-time integration fee alongside a recurring fee needs a reason attached to it, and I couldn't find one.

- **Learning curve.** Warmup settings, ramp stages, and per-account limits all interact, and it takes some reading before you understand what's governing your send volume.

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Founder Team

Hello_WarmySender

Sep 4, 2026

Thanks for taking the time to write this out — it's clearly from real use, and that's exactly the kind of feedback we want. Glad the warmup, the all-in-one setup, and the API/MCP access are working for how you run things.

On the add-ons: fair points. Just so it's clear for anyone reading — everything in your AppSumo deal (cold email, warmup, the lead database, and verification) is included, no extra charge. LinkedIn and WhatsApp are separate because each one carries real per-account risk and its own setup, which is why they're priced on their own. But your point about wanting to test them before paying is a good one, and we're talking about it internally.

On the learning curve — the ramp and per-account limits are set conservatively on purpose to protect your domains, but you shouldn't have to guess at what's going on. There's a walkthrough at warmysender.com/documentation that should make it clearer.

Appreciate you backing us early on.

— The WarmySender Team

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ahtishammuh

Incentivized

The author was offered an incentive (such as a discount, perk, or prize) by the partner. While rewarded, reviewers are always encouraged to share their authentic, unbiased experience.

Verified purchaser

Deals bought: 1Member since: Aug 2026

Sep 3, 2026

⭐️⭐️⭐️⭐️⭐️ Really impressed with WarmySender

I came across WarmySender on AppSumo and decided to give it a try. Honestly, I’m really happy with it so far.

It’s not just another email sending tool. The warmup, campaigns, sequences, verification, deliverability features, and lead database all in one place make it really useful, especially if you’re doing outreach regularly.

What I like most is that the team is clearly still working on the product and adding new things. It already works really well, but I can see a lot of potential for it to become even better.

I grabbed the lifetime deal and definitely feel like it was a good decision.

Really solid product and a team worth supporting. Keep it up! 🚀

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Founder Team

Hello_WarmySender

Sep 4, 2026

Thanks for the kind words. You summed it up well — having warmup, campaigns, verification, and the lead database in one place instead of spread across three tools is the whole point. And yeah, we're still shipping a lot, so there's more coming. Thanks for grabbing the lifetime deal — you can keep up with new features at warmysender.com/documentation.

— The WarmySender Team

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ANDROCAT2.0

Verified purchaser

Deals bought: 49Member since: Jan 2023

Sep 3, 2026

You Can Tell They Know Cold Outreach...

I bought Tier 2 because I’m launching new specialized services and SaaS products, and cold outreach will be one of several channels I use to start sales conversations and generate initial visibility.

Cold outreach is not my core business, so I was looking for a specialized platform that could handle this side of the process with strong deliverability practices, without forcing me to build and manage an overly complex stack. Since I already work with automation workflows in n8n, WarmySender fits well as a focused cold email layer within my broader sales and automation system.

What stands out most is that the team clearly understands the real operational challenges behind cold outreach. This is not just a tool for sending sequences. It brings together warmup, sender reputation, email verification, inbox rotation, sending controls, and campaign management in one place. Those details matter when you want to protect domains, improve inbox placement, and scale outreach more responsibly.

I am still in the early stages of using the platform, but I was able to access it and move forward with the initial setup. The interface is clean, the product direction is clear, and it can save significant time compared with managing multiple disconnected tools.

One limitation for my use case is the lead directory. Many of my clients are in Mexico, and the available coverage for that market seems limited, so I will probably continue using external sources for local prospecting.

Support does respond, usually within about 24 hours. It is not the fastest support experience, but there is follow-up and communication.

WarmySender looks like a strong option for agencies, consultants, and SaaS businesses that want to use cold outreach as an acquisition channel while keeping deliverability at the center of the operation. I will update this review once I have run real campaigns and collected more complete results.

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Founder Team

Hello_WarmySender

Sep 3, 2026

Thank you for a review this considered — the operational framing is exactly how we think about it, and it's rare to see it written down.

On Mexico, let me give you something more useful than "we'll look into it," because the answer is better than it looks. There are around 650,000 Mexican contacts in the directory and virtually all of them have an email. 99% also carry a job title and about 80% have a city. What's genuinely thin is industry and category tagging, which is close to empty outside the US, along with phone and website. So if you filtered by industry or category you'd have seen almost nothing and reasonably concluded the coverage was poor. Filter by job title plus city and Mexico opens up properly.

That's on us, not on you — the filters you'd naturally reach for first are the ones with the least behind them outside the US, and it's the weakest part of the directory today.

On support: fair, and noted. 24 hours isn't where we want it either.

When you've run real campaigns we'd genuinely like to hear how they land.

— The WarmySender Team

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maryjackmarketer

Verified purchaser

Deals bought: 19Member since: Dec 2023

Sep 3, 2026

The Best Email Warmup, Cold Emailing, High-Quality Leads & Lead Verification Tool

I’ve been testing different email warmup, cold emailing, lead generation, prospect data, and email verification tools since 2021. After trying so many different platforms, WarmySender is the first one that made me think: “Finally, everything I need is in one place!”

I’ve been using WarmySender for the last 6 months, and I’m genuinely impressed with the value and quality they’re delivering.

The email warmup is excellent. I still use a few other warmup tools, but WarmySender has become one of my favorites. The fact that they also offer prospect data, email verification, and cold email outreach makes it even more valuable.

That’s what I really like about WarmySender. Instead of having to jump between multiple tools for finding leads, verifying emails, warming up inboxes, and running outreach campaigns, you can do so much from one platform.

If you’re serious about cold email and lead generation, deliverability is everything. There’s no point having thousands of leads if your emails end up in spam. WarmySender has become an important part of my outreach stack for exactly this reason.

I’ve been using tools in this space for years, and honestly, WarmySender is one of the tools that has genuinely delivered value for me.

🔥 Great warmup

🔥 Useful prospect data

🔥 Email verification

🔥 Cold email capabilities

🔥 Excellent overall value

If you’re doing cold email, running an agency, generating leads, or doing outbound sales, I highly recommend giving WarmySender a serious look.

Highly, highly, highly recommended! 🚀

This is definitely one of those AppSumo deals where I’m happy I jumped in.

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Founder Team

Hello_WarmySender

Sep 3, 2026

Thank you — genuinely. Six months in and still writing something this considered means more to us than a rating ever could.

"Everything I need in one place" is the whole thesis. Leads, verification, warm-up and sending all read from each other, and that's the part you lose the moment they're four separate tools.

If you ever have thirty seconds spare, a note on Trustpilot helps people outside AppSumo find us too. And thank you for jumping in.

— The WarmySender Team

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Company details

M Numan H.

Founder

\ See WarmySender](https://warmysender.com/?utm_source=appsumo)

Founded January 1, 2025

🇦🇪Dubai, United Arab Emirates

1-10

Growth

Bootstrapped

warmysender.com

Showing 1-4 of 4 posts

Updated Sep 8, 2026

New: License Tier 5, exclusively for Plus members

Hey there, Sumo-lings!

A few of our biggest Tier 4 customers kept asking for more room to grow, so we built them more room.

License Tier 5 is live now, and it's exclusive to AppSumo Plus members.

You get:

...roughly double what Tier 4 gives you.

Everything else stays the same: warmup, multi-step sequences, A-Z testing, unified inbox, and the rest of the feature set you already know.

This tier is just for teams running WarmySender at serious scale.

Not a Plus member yet? This is exactly the kind of thing you're missing out on.

...

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Warmy Sender

Updated Sep 1, 2026

We just 4x'd your email verification limits

Hey, I'm Numan, founder of WarmySender, writing from Dubai.

Bounces are the fastest way to tank your sender reputation, so we didn't want verification credits to be the thing standing between you and a clean list.

Starting today, every plan gets 4x the monthly email verifications:

Same price, same plan, just a lot more room to verify before you send.

Keep the feedback coming. It's exactly how we decide what to build next.

Warmy Sender

Updated Sep 1, 2026

20% off any add-on for 6 months — code APPSUMO20

Hey AppSumo fam — thanks for backing us. The response today has been brilliant. Your lifetime deal already covers the core platform: cold email campaigns and sequences, email warmup, the B2B leads database, and real-time email verification. That is yours permanently, and nothing here changes it. If you also want to reach people on LinkedIn, Instagram or WhatsApp, those are optional add-ons — and as a thank you, use code APPSUMO20 at checkout for 20% off your first 6 months on any of them. A few honest notes so you can decide properly. LinkedIn has real in-app search, so you can build audiences inside WarmySender. Instagram is bring-your-own-h...

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Warmy Sender

Updated Jul 15, 2026

A message from WarmySender

Hey AppSumo fam! 👋

We built WarmySender because hitting “send” on cold emails shouldn’t feel like tossing bottles into the ocean.

Prefer autopilot? Tell our AI agent what you sell in plain English and watch it spin up a full campaign, subject lines to follow-ups, in minutes. 🚀

We’re thrilled to launch on AppSumo and hand growth hackers, founders, and agencies the keys to predictable outreach.

Grab the lifetime deal, skip the spam folder...

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Warmy Sender