Highest rate
we've seen in 3 months
12%
Cashback on Warmy
Verified Live · 14 August 2026 at 11:55
98%
Tracking Success
~7 hrs
Avg. Time Tracking
$0k
Paid to members
Redirects to warmy.io — cashback tracked automatically.
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Warmy
Warmy.io is an email deliverability and warmup tool that runs simulated inbox conversations on your sending accounts to build sender reputation and keep cold emails out of spam. AI-powered, runs automatically, handles Gmail, Outlook, Microsoft 365 and custom domains. Sign up through Rewardio for 12% recurring monthly cashback every billing cycle, real money paid to PayPal while Warmy handles the warmup grind.
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Reliable Tracking
We track 98% of all purchases successfully. Click through, shop as normal, and your cashback is recorded automatically. If anything goes wrong, raise a claim in one click.
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Fast Payouts
Most cashback is tracked within hours and confirmed within 14-30 days. Once confirmed, withdraw instantly to PayPal or your bank — no minimum payout, no waiting around.
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Best Rate Guaranteed
We compare our rates against Rakuten, TopCashBack, and Quidco so you don't have to. If we're not the best, we'll tell you. Right now, we're offering the highest cashback anywhere.
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0+ members have earned cashback from Warmy
£0.0M cashback paid out ✓
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Premium plan£8.50/mo
Annual£102.00
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About Warmy
Warmy.io is one of the more recognised names in email deliverability and warmup, used by solo founders, SDRs and outbound teams trying to keep cold emails out of spam. The tool runs simulated inbox conversations on your sending accounts using AI-generated content (their "Adeline" branding) — opens, replies, marks as important, moves out of promotions tab — to build sender reputation gradually before you scale send volume. Supports Gmail, Outlook, Microsoft 365 and custom SMTP, with deliverability testing across 30+ ESP networks.
The product covers more than warmup alone. The deliverability dashboard tracks domain reputation, blacklist status, SPF/DKIM/DMARC records, and inbox placement across major providers. Email content checker analyses copy for spam triggers semantically (not just keyword matches), which matters more in 2026 as Gmail and Outlook lean harder on content analysis for sender legitimacy. Seed list testing shows which ESPs are placing your emails in primary, promotions or spam folders before you send to real prospects. List validation checks contact addresses and assigns deliverability scores 1-10.
Pricing is opaque — Warmy doesn't publish rates on its website. Third-party tracking puts it around $49/inbox/month at the entry tier, with Premium plans landing significantly higher at scale (one reviewer documented $2,155/month for 19 inboxes). The honest catches: per-inbox pricing is genuinely a tax on growth, the opacity makes total cost hard to plan around, and competitors like Mailivery and TrulyInbox offer unlimited inboxes at lower price points for teams scaling beyond 5-10 sending accounts. For solo founders and small teams running 1-2 inboxes who want hands-off AI warmup, Warmy is properly capable. Sign up through Rewardio for 12% recurring monthly cashback.
The product covers more than warmup alone. The deliverability dashboard tracks domain reputation, blacklist status, SPF/DKIM/DMARC records, and inbox placement across major providers. Email content checker analyses copy for spam triggers semantically (not just keyword matches), which matters more in 2026 as Gmail and Outlook lean harder on content analysis for sender legitimacy. Seed list testing shows which ESPs are placing your emails in primary, promotions or spam folders before you send to real prospects. List validation checks contact addresses and assigns deliverability scores 1-10.
Pricing is opaque — Warmy doesn't publish rates on its website. Third-party tracking puts it around $49/inbox/month at the entry tier, with Premium plans landing significantly higher at scale (one reviewer documented $2,155/month for 19 inboxes). The honest catches: per-inbox pricing is genuinely a tax on growth, the opacity makes total cost hard to plan around, and competitors like Mailivery and TrulyInbox offer unlimited inboxes at lower price points for teams scaling beyond 5-10 sending accounts. For solo founders and small teams running 1-2 inboxes who want hands-off AI warmup, Warmy is properly capable. Sign up through Rewardio for 12% recurring monthly cashback.
12% recurring monthly cashback every billing cycle
AI-powered email warmup across Gmail, Outlook, Microsoft 365
Deliverability testing across 30+ ESP networks
Domain reputation, blacklist and SPF/DKIM/DMARC monitoring
Semantic spam analysis, not just keyword matching
30+ language support for international warmup
Our Warmy Review
Warmy
Email deliverability & Warmup · reviewed by Rewardio · June 2026
Score
3.9 / 5
Ease of use
4.4
Features
4.5
Value for money
3.3
Customer support
4.3
💰
Cashback with Rewardio
12%
What we like
- AI warmup that genuinely works for 1-2 inbox setups — solo founders and SDRs get real deliverability improvements
- Properly comprehensive deliverability dashboard with semantic spam analysis competitors lack
- 30+ language support matters for international outbound — most competitors don't handle this
Where it falls short
- Per-inbox pricing at around $49/month becomes a tax on growth for teams scaling beyond 2-3 inboxes
- Opaque pricing model (not published on website) makes budgeting properly difficult
- At scale, competitors (Mailivery, TrulyInbox) offer unlimited inboxes for less than Warmy's per-inbox rate
Our Verdict
Warmy.io is the right answer when you're a solo founder or SDR warming 1-2 sending inboxes and want hands-off AI warmup with a proper deliverability dashboard layered on top. The product is genuinely capable, the support is good, and the semantic spam analysis catches issues that simpler tools miss. The honest catch is pricing — the per-inbox model and opaque rates make Warmy properly expensive for agencies scaling outbound across multiple clients. For small setups, sign up through Rewardio and take the 12% cashback edge. For 5+ inboxes, look at Mailivery, TrulyInbox or Smartlead's built-in warmup before committing.
See Warmy in action
Warmy.io homepage
Warmy.io pricing
Warmy.io partners
Warmy.io deliverability tool
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Frequently Asked Questions
Answering the questions we actually get about Warmy.
How does Warmy cashback through Rewardio work?
Click through Rewardio to Warmy.io, start your subscription (typically beginning with a 7-day free trial, then converting to a paid plan), and pay as normal. Every month your subscription stays active, Warmy pays us a commission and we pass 12% back to you as real cashback. Lands in your Rewardio balance every billing cycle, withdrawable to PayPal with no minimum.
Why doesn't Warmy publish its pricing?
Honest answer: nobody really knows, but third-party tracking suggests Warmy adjusts pricing through sales conversations rather than charging fixed published rates. The opacity is genuinely a frustration flagged across reviews and Reddit threads. Plan budgets around the third-party tracked numbers (roughly $49/inbox/month at entry, scaling significantly higher with inbox count), but expect actual pricing to vary based on tier, contract length, and any negotiation you do during the sales process.
Does email warmup actually work?
Mostly yes, for the right setup. Email warmup builds sender reputation by simulating engaged inbox behaviour (opens, replies, moves out of promotions, marks as important) on your domain. ESPs like Gmail and Outlook track this engagement and adjust their treatment of your domain accordingly. The catch: warmup alone won't fix misconfigured DNS records, invalid prospect lists, or overly commercial content. Treat warmup as one layer of deliverability infrastructure, not a complete solution. Most reviewers report meaningful deliverability improvements within 4-6 weeks of proper warmup, particularly on new domains.
Is Warmy worth $49 per inbox if competitors offer unlimited inboxes?
Depends on team size. Solo founders or SDRs with 1-2 inboxes: Warmy is properly competitive, the AI is polished, support is good. Small teams with 3-5 inboxes: the maths gets tighter — you're paying $147-$245/month for what could cost $79-$97 elsewhere (Mailivery, TrulyInbox). Agencies with 10+ inboxes: Warmy becomes properly expensive at scale, and the per-inbox pricing genuinely is a tax on growth. The deliverability dashboard and semantic spam analysis are real differentiators worth paying for if you need them — but at scale, alternative tools usually win on cost.
How does Warmy compare to Mailivery, TrulyInbox or Smartlead's built-in warmup?
Different positioning. Smartlead includes warmup as part of its cold email platform — already free if you're sending via Smartlead. Mailivery offers unlimited inboxes at lower flat pricing, suited to agencies scaling outbound. TrulyInbox is the budget option at around $79/month for unlimited inboxes. Warmy wins on the deliverability dashboard depth, AI quality, and semantic spam analysis. For solo founders, Warmy. For pure warmup at scale, Mailivery or TrulyInbox. For integrated cold email with warmup, Smartlead's built-in option saves you a tool entirely.
What does Warmy actually monitor beyond warmup?
Genuine deliverability infrastructure beyond simple warmup. Domain reputation tracking (Google Postmaster Tools integration, blacklist monitoring across 100+ blacklists), DNS record analysis (SPF, DKIM, DMARC verification), inbox placement testing across 30+ ESP networks (Gmail Workspace, Microsoft 365, Outlook, Yahoo, Zoho and others), seed list testing showing primary vs promotions vs spam placement, email content checker with semantic analysis, list validation scoring 1-10 on email addresses. The dashboard depth is genuinely a Warmy strength — competitors often lack this level of monitoring.
Does Warmy work with my cold email platform?
Yes, broadly. Warmy connects via standard SMTP credentials, so it works alongside any cold email platform (Smartlead, Instantly, Apollo, Lemlist, Reply.io, Outreach, Salesloft). The warmup runs separately from your sending — Warmy handles inbox-to-inbox simulation in the background while your cold email platform sends actual campaigns. No technical integration required beyond connecting the inbox.
What languages does Warmy support for warmup?
30+ languages including English, Spanish, French, German, Italian, Portuguese, Dutch, Polish, Russian, Czech, Romanian, Bulgarian, Greek, Turkish, Hebrew, Arabic, Hindi, Chinese, Japanese, Korean, Vietnamese, Thai and others. Important if you're warming up for international outbound — sending English-only warmup traffic to a domain you'll use for Spanish or German campaigns can actually hurt deliverability rather than help. Match the warmup language to your real sending language.
Can I stack Warmy discounts with Rewardio cashback?
Yes. Annual billing discounts (when offered) apply automatically and stack with Rewardio cashback. Warmy occasionally runs promotional offers through their marketing channels — stick to discount codes shown directly on Rewardio or Warmy's own site rather than third-party coupon aggregators, which can occasionally break tracking.
How long does Warmy cashback take to confirm?
Most SaaS subscription cashback confirms within 30 to 60 days, once Warmy has verified the subscription is active and past any refund window. Recurring monthly cashback continues confirming month by month for the life of the subscription. Once confirmed, it lands in your Rewardio balance ready to withdraw to PayPal with no minimum threshold.
Warmy
via Rewardio
12%