Warmy
Automated warm-up with placement checks built in
Warmy is an email warm-up service that automatically builds sender reputation using AI-paced engagement between real inboxes, bundled with free deliverability tests, DNS checks, and placement monitoring. Unusually, it also warms ESP senders like SendGrid, not just sales mailboxes.
Overview
Warmy's pitch is automation: connect a mailbox, and its engine handles ramp-up pacing, engagement patterns, topic selection, and language matching with minimal configuration, using a network it says spans thousands of real inboxes across providers, languages, and regions.
Around the warmer, Warmy bundles the checks senders would otherwise buy separately, free email deliverability tests, SPF/DKIM/DMARC validation and record generation, blacklist monitoring, and placement reporting, which at its price point makes it the value pick for teams standing up sending infrastructure.
Its quiet differentiator is breadth of connection: beyond Google, Microsoft, and SMTP, Warmy warms senders on ESPs and infrastructure like SendGrid, Mailgun, and Amazon SES. That opens a market the cold-email-bundled warmers ignore entirely, marketing and transactional senders building or recovering domain reputation.
Best for
Founders, small teams, and agencies that want reliable automated warm-up plus basic deliverability monitoring at a value price, including for ESP-based senders no one else warms.
Not the right fit for
- Operators who want granular manual control of ramp curves and warming behavior; Smartlead and MailReach expose more knobs.
- Teams needing continuous ops-grade placement monitoring and audits; that's Folderly's tier.
- High-stakes cold-email specialists who prioritize curated network quality over automation; that's MailReach's pitch.
- Anyone expecting sending features; Warmy warms and monitors, it doesn't send campaigns.
How it works
- 1
You connect a mailbox or sending service (OAuth for Google/Microsoft; SMTP/API for ESPs), and Warmy's engine, branded around an AI assistant called Adeline, selects a ramp plan based on mailbox age, provider, and target volume. Warming conversations begin between your sender and network inboxes: sends, opens, replies, archiving, spam rescue.
- 2
Pacing adapts automatically: volume climbs on a curve, engagement rates mimic human correspondence, and conversation topics/language match your business profile so threads look plausible to filtering systems.
- 3
In parallel, Warmy monitors the technical layer, authentication records validated (with copy-paste record generation for fixes), blacklists watched, and free placement tests available to check where real mail lands. Dashboards per mailbox show warm-up progress, placement trends, and an overall health score; API and white-label options serve agencies embedding warming into their own stack.
Feature breakdown
17 features in 4 modulesAutomated warming engine
Set-and-forget reputation building with adaptive pacing.- AI-paced ramp (Adeline)
- Ramp speed, engagement mix, and daily volume tuned automatically per mailbox age, provider, and goal.
- Language & topic matching
- Warming threads generated in your language and business context across a multilingual network.
- Spam rescue
- Spam-foldered warming mail is marked not-spam and moved to inbox to repair reputation signals.
- Weekend & schedule realism
- Sending patterns respect business-hours and weekday rhythms to look human.
- Warm-up templates by goal
- Preset programs for new domain, recovery, and pre-campaign scenarios.
Broad sender support
The category's widest connection surface.- Google & Microsoft OAuth
- Standard sales-mailbox warming with secure OAuth connection.
- Any SMTP/IMAP
- Custom infrastructure and niche hosts connect directly.
- ESP & infrastructure warming
- SendGrid, Mailgun, Amazon SES, and similar senders can be warmed, rare in this category and vital for marketing/transactional domains.
- Multi-region network
- Network inboxes across regions/providers let warming reflect your actual audience geography.
Deliverability checks
The bundled testing layer, much of it free.- Free placement tests
- Seed-list tests report inbox/promotions/spam placement; a free public checker drives top-of-funnel.
- Authentication validation & generation
- SPF, DKIM, DMARC checked continuously, with generated records to paste into DNS.
- Blacklist monitoring
- Watches major blocklists with alerting.
- Health scoring
- Per-mailbox composite score tracking warm-up progress and placement trend.
Scale & agency features
Fleet operations and embedding.- Bulk mailbox management
- Connect and manage fleets with grouped dashboards.
- API access
- Programmatic mailbox connection, status, and reporting on upper tiers.
- White-label options
- Agencies can offer warming under their own brand on custom plans.
- Team seats & roles
- Shared visibility across operators.
Use cases
4 documentedBootstrapped founder
Setting up first outbound domains with no deliverability expertise and no budget for consultants.
Auto-piloted warming plus generated DNS records gets authentication right and mailboxes campaign-ready in a month for under $50/mailbox.
Email marketing manager on SendGrid
New dedicated IP and domain for a newsletter; ESP gives ramp guidelines but no engagement help.
ESP warming, unavailable from cold-email-bundled tools, builds engagement history so the first real sends don't tank.
Agency managing mixed client stacks
Clients send from Google, Microsoft, and SES; wants one warming vendor across all of it, ideally under its own brand.
Universal connections plus white-label and API make Warmy the single warming layer in the agency's offer.
Deliverability recovery case
A marketing domain hit by a spam-trap incident needs reputation rebuilt without pausing business email.
Recovery-mode warming raises engagement signals while blacklist monitoring confirms delistings take hold.
Pricing
from Not published; volume-based quote after a 7-day trialQuote-only as of September 2026. The pricing page now shows three plan shapes, B2B Sender, B2C Sender, and Custom, all described as volume-based with no figures published. A seven-day trial with no card is the only self-serve way in.
| Plan | Price | Includes |
|---|---|---|
| B2B Sender | Not published volume-based |
Aimed at corporate recipients. Every published feature is shared across the plans; what varies is volume, and the rate is quoted. |
| B2C Sender | Not published volume-based |
|
| Custom | Custom quoted |
|
Billing notes
- Warmy removed its published per-mailbox pricing between our August and September 2026 checks. The tiers that used to read $49, $129, and $189 per mailbox are gone, replaced by B2B and B2C sender plans with volume-based pricing and a demo booking.
- Any per-mailbox figure quoted for Warmy elsewhere on the web now predates that change and should not be relied on.
- The seven-day trial needs no credit card, which keeps the product self-serve to evaluate even though the price is not self-serve to discover.
- The free deliverability test and domain health checkers remain available outside any plan.
- Feature gating appears to have gone: the page lists the same capability set under every plan, so the quote is a volume conversation rather than a feature one.
Value assessment: Value is now hard to judge from the outside, which is itself the finding. Warmy used to publish a $49 entry rate that bundled warming, DNS tooling, and basic testing for less than those parts cost separately; that number is gone, and the page asks for a demo instead. What can still be assessed is the capability set, which is the broadest in the category: a million-mailbox network, a rotating 500,000-address US seed list, an AI co-pilot, Postmaster data, verification, and DMARC, all listed under every plan rather than gated. The free checkers remain genuinely useful, and the seven-day no-card trial means you can test the product before you know what it costs. Buyers who need a published number to budget against should shortlist MailReach at $19.50 a mailbox or MailStrike at $45 for six, and treat Warmy as the quote you get when volume is large enough to justify the call.
Entry price history
Published pricing was withdrawn on 20 September 2026. The last rate we recorded was $49 on 22 August 2026.
| Checked | Entry price | What happened |
|---|---|---|
| 20 September 2026 | Not published | Not a price cut. Warmy removed published pricing entirely: the $49, $129, and $189 per-mailbox tiers were replaced by B2B Sender, B2C Sender, and Custom plans described as volume-based, with a demo booking instead of a rate card. A seven-day trial with no card remains. |
| 22 August 2026 | $49/mailbox/mo | First recorded |
Dates are when SaaSTracker checked the vendor’s published pricing, not when the vendor changed it. See the price changes log for movements across the whole database.
Strengths & limitations
Strengths
- Warms ESP/infrastructure senders (SendGrid, Mailgun, SES), nearly unique in the category.
- Genuinely automated: good default behavior with minimal configuration required.
- Bundled DNS validation with record generation removes the most common self-inflicted failures.
- Free testing tools lower the barrier to diagnosing problems before paying.
- API + white-label make it embeddable for agencies.
Limitations
- Less manual control over warming behavior than operator-oriented rivals.
- Network curation is less transparent than MailReach's quality-first positioning.
- Continuous monitoring is lighter than Folderly's ops suite.
- Per-mailbox price at higher volume tiers climbs quickly.
- As with all warm-up networks, provider terms-of-service risk is inherent to the category.
Head-to-head comparisons
5 alternativesWarmy vs MailReach
from $19.50 per mailbox per month, or $16 per mailbox per month billed annuallyMailReach sells curated network quality and real-content testing to cold-email professionals; Warmy sells automation, breadth, and value. Deliverability-obsessed outbound teams lean MailReach; everyone else, especially ESP senders, gets more from Warmy.
Full Warmy vs MailReach comparisonWarmy vs Folderly
from $96 per mailbox per month billed annually (Folderly), or $0 (Inbox Insights and Pulse free tiers)Folderly is continuous monitoring and expert operations at premium price; Warmy is automated warming with enough checks for most teams at a third of the cost. Buy Folderly for the program, Warmy for the task.
Full Warmy vs Folderly comparisonWarmy vs Instantly
from $47 per month, or $37.60 per month billed annually (Outreach Growth)If you send through Instantly, its free bundled warm-up is the default; Warmy earns its fee when you need ESP warming, DNS tooling, or warming independent of any one sending platform.
Full Warmy vs Instantly comparisonWarmy vs MailStrike
from $18 per mailbox per month billed annually ($23 monthly) for the first five mailboxesFeature lists overlap heavily: warming, DNS tooling, placement checks, agency dashboards. Warmy is the broader, more established console; MailStrike warms with an AI Agent per mailbox rather than a shared network pattern, is cheaper per mailbox at volume, and adds an at-scale seedlist for campaign pre-sends. ESP-heavy marketing senders lean Warmy; agencies and B2C senders lean MailStrike.
Full Warmy vs MailStrike comparisonWarmy vs InboxAlly
from $149/monthBoth warm any sending platform rather than only cold-email tools. Warmy wraps warming in a broader deliverability console with DNS and template checks; InboxAlly stays narrower and is usually cheaper per inbox at comparable send volumes. Buyers wanting one dashboard pick Warmy, buyers wanting engagement volume pick InboxAlly.
Full Warmy vs InboxAlly comparisonPairs well with
8 categoriesWarmy is a deliverability tool, and a team running it still has 8 neighbouring categories to staff. The pick in each is ListKit for cold email outreach, Mailforge for cold email infrastructure, Scrubby for email verification, Resend for email service providers, Amplemarket for sales engagement, Reachy for AI SDR agents, Salesflare for sales CRM and Triple Whale for GTM analytics, each the leading tool in that category on published criteria.
- ListKitCold Email Outreach · Ease of Use
- Because
- Warmy is built for deliverability, not cold email. ListKit adds self-serve checkout with cancel-anytime terms.
- Benefit
- Outreach goes out on a schedule and replies land in one place instead of a personal inbox.
- MailforgeCold Email Infrastructure · Innovation
- Because
- Warmy is built for deliverability, not infrastructure. Mailforge adds part of a coherent product ladder.
- Benefit
- Sending moves off the main domain, so a burned domain costs a spare rather than the company's email.
- ScrubbyEmail Verification · Innovation
- Because
- Warmy is built for deliverability, not verification. Scrubby adds probing happens from Scrubby's infrastructure.
- Benefit
- Dead addresses come off the list before the send, so the bounce rate never touches the domain.
- ResendEmail Service Providers · Innovation
- Because
- Warmy is built for deliverability, not ESPs. Resend adds best developer experience in transactional email by a wide margin.
- Benefit
- An opt-in audience is owned rather than rented, and reaching it costs nothing per send.
- AmplemarketSales Engagement · Innovation
- Because
- Warmy is built for deliverability, not engagement. Amplemarket adds duo's three-agent design.
- Benefit
- One cadence covers email, calls and LinkedIn, so nobody drops a follow-up between tools.
- ReachyAI SDR Agents · Innovation
- Because
- Warmy is built for deliverability, not AI SDR. Reachy adds a fourteen day full-feature trial with no card plus a seven day.
- Benefit
- Research, writing and sending happen without a headcount, and the meetings still get booked.
- SalesflareSales CRM · Innovation
- Because
- Warmy is built for deliverability, not CRM. Salesflare adds email tracking through to website-visit tracking.
- Benefit
- Every conversation ends up on a record, so a rep leaving does not take the pipeline with them.
- Triple WhaleGTM Analytics · Innovation
- Because
- Warmy is built for deliverability, not analytics. Triple Whale adds a real free plan with first and last click attribution.
- Benefit
- Spend gets attributed to revenue, so the channel that works is the one that gets funded.
Pairings follow the methodology: the leading tool in each complementary category, chosen on published criteria. Placement cannot be purchased.
Full Warmy stackImplementation & onboarding
- Setup time
- Minutes per mailbox; ESP connections take a bit longer (API keys, DNS). New domains need 3-4 weeks of warming before real volume.
- Learning curve
- Low, the automation-first design targets non-experts; dashboards explain themselves.
- Onboarding
- Self-serve with setup wizards; custom plans get guided onboarding.
- Migration notes
- Switching warmers is low-friction; overlap a week during transition. DNS records generated by Warmy are standard and portable.
Platform, API & security
- Platforms
- Web appREST API (upper tiers)
- API
- Mailbox connection, warm-up status, and reporting endpoints; used by agencies embedding warming.
- Compliance
- GDPR-aligned processes
- Data residency
- Cloud-hosted (US/EU mix); no formal residency commitments.
- SSO
- Google sign-in.
- Security notes
- OAuth for Google/Microsoft; API keys for ESP connections stored encrypted. No published SOC 2 as of this review.
Support & resources
- Channels
- Live chatEmailPriority support on Premium+
- Documentation
- Solid help center with provider-specific setup guides (including ESP walkthroughs rivals lack).
- Community
- No formal community; content-led education.
Company
- Founded
- 2021
- Headquarters
- Tel Aviv, Israel
- Ownership
- Privately held
- Employees
- ~40 (est. 2026)
- Funding
- No significant outside funding disclosed.
Timeline
- 2021Launches as an automated warm-up service with the Adeline AI pacing engine.
- 2022Free deliverability test and DNS tooling become the top-of-funnel.
- 2023ESP and SES warming opens the marketing/transactional market.
- 2024API and white-label court agencies; network expands multilingually.
- 2025Recovery-mode programs and richer placement reporting round out the suite.
Integrations
- Google Workspace
- Microsoft 365
- Custom SMTP/IMAP
- SendGrid
- Mailgun
- Amazon SES
- Zapier
- API
Frequently asked questions
11 questionsWhat is Warmy used for?
Warmy is used to warm up email senders automatically, building reputation through AI-paced engagement with real inboxes, and to monitor deliverability with placement tests, DNS validation, and blacklist alerts. Uniquely, it warms ESP senders like SendGrid and Amazon SES as well as regular mailboxes.
How much does Warmy cost?
Warmy no longer publishes prices. As of September 2026 the pricing page shows three shapes, B2B Sender, B2C Sender, and Custom, all described as volume-based, with a demo booking rather than a rate card. The previous $49, $129, and $189 per-mailbox tiers have been removed. A seven-day trial needs no credit card, and the free deliverability test and domain health checkers are still available outside any plan.
Does Warmy offer anything for free?
Yes, a free email deliverability test and domain health checkers (SPF/DKIM/DMARC validation) that work without a paid plan.
Can Warmy warm marketing senders like SendGrid or Amazon SES?
Yes. Unlike cold-outreach-only warmers, Warmy connects to ESPs and sending infrastructure (SendGrid, Mailgun, SES), which matters for newsletter, product, and transactional domains building or recovering reputation.
How long does Warmy take to warm a new mailbox?
Plan on 3-4 weeks for a new domain/mailbox before meaningful campaign volume, with warming continuing at maintenance level afterward. Recovery cases vary with the damage.
Warmy vs MailReach, which should I choose?
MailReach for cold-email specialists who want curated network quality and real-content placement testing; Warmy for automated ease, ESP support, and bundled DNS tooling at a lower effective cost.
Does Warmy have an API?
Yes, on upper tiers, mailbox connection, warm-up status, and reporting endpoints, plus white-label options for agencies embedding warming into their own offer.
Is email warm-up allowed by Google and Microsoft?
Engagement networks conflict with provider terms, and providers periodically tighten detection, a category-wide risk no warm-up vendor escapes. Warmy mitigates with human-like pacing and realistic threads, but senders should treat warming as complementary to genuinely good sending practices.
What should I pair Warmy with?
Warmy is a deliverability tool, and a team running it still has 8 neighbouring categories to staff. The pick in each is ListKit for cold email outreach, Mailforge for cold email infrastructure, Scrubby for email verification, Resend for email service providers, Amplemarket for sales engagement, Reachy for AI SDR agents, Salesflare for sales CRM and Triple Whale for GTM analytics, each the leading tool in that category on published criteria.
What do I pair with Warmy for Cold Email Outreach?
ListKit. Warmy is built for deliverability, not cold email. ListKit adds self-serve checkout with cancel-anytime terms.
Is Warmy enough on its own?
For deliverability, yes. Warmy does not cover cold email infrastructure, email verification and email service providers, and its own profile says so; Mailforge, Scrubby and Resend are the tools that fill those gaps.
Editorial verdict
Warmy wins the value slot in deliverability: automation good enough to trust, DNS tooling that prevents rookie disasters, and, its ace, warming for ESP senders nobody else serves. Cold-email purists chasing the last percentile of network quality will pay MailReach's premium, and ops teams will graduate to Folderly, but for most senders standing up or maintaining reputation, Warmy is the sensible default.
Written by the SaaSTracker editorial team. Awards, when shown, are judged against the published criteria in our methodology.