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Side-by-side comparisonBy the Warmy deliverability team Updated
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Warmy brings Adeline AI, personalized warm-up, real link clicks, inbox placement testing, verification and reputation monitoring together in one all-in-one deliverability platform.
Unspam’s REST workflow creates a test and returns an address; the user sends a real message there and retrieves score and diagnostic details as JSON.
Key takeaways
Good to knowWarmy goes beyond a single email tool: Adeline AI, warm-up, testing, monitoring and verification work together to improve your deliverability.
Warmy brings ongoing optimization, actionable intelligence and deliverability measurement into one platform. See how that broader coverage compares with the specialist capabilities below.
| Feature | Warmy | Unspam |
|---|---|---|
| Primary focus | All-in-one, self-serve email deliverability infrastructure | Unspam’s REST workflow creates a test and returns an address; the user sends a real message there and retrieves score and diagnostic details as JSON. |
| Best-fit audience | Teams improving and measuring sender reputation across their existing sending stack. | The preview API supports raw HTML and references to existing tests, returning screenshots from supported clients and devices. Light and dark modes are separate render variants. |
| Spam diagnostics | Warmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature. | API returns a score with individual check results. |
| Authentication checks | SPF, DKIM, and DMARC tracking, record checks, and DMARC report analysis | Results cover SPF, DKIM and DMARC. |
| Blocklist checks | Domain/IP reputation tracking, blacklist alerts, spam-placement reports | Results include IP blocklist diagnostics. |
| SpamAssassin | Warmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature. | Diagnostic result set includes SpamAssassin. |
| Broken links | Warmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature. | Checks include broken links. |
| REST creation | Warmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature. | Create a test to obtain a unique submission address. |
| Asynchronous retrieval | Warmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature. | Send the email then poll the test result. |
| Heatmap retrieval | Warmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature. | API exposes attention/focus heatmap output. |
| Real client previews | Warmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature. | Preview API captures messages in supported clients/devices. |
| Raw HTML input | Warmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature. | Preview requests can accept raw HTML. |
| Existing-test input | Warmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature. | Preview requests can reference spam or placement tests. |
| Light/dark variants | Warmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature. | Dark mode is represented as separate rendering output. |
| Custom-plan API | Documented API included on every plan | Full API and MCP access are listed on Custom plan. |
| Autopilot | Warmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature. | Pricing describes scheduled testing on Custom. |
| DMARC monitoring | SPF, DKIM, and DMARC tracking, record checks, and DMARC report analysis | Custom plan adds monitoring. |
| Verification | Built-in | Custom supports single-address and list verification. |
| Historical retention | Warmy focuses on reputation, placement testing and monitoring; this specialist capability is not presented as an equivalent Warmy feature. | Custom lists three-year data retention. |
| Pricing and billing | From $49/month, billed monthly | Current free and configurable Custom packaging; paid total unverified. Service allowances plus Custom top-up credits |
| Trial and free access | Seven days, no credit card required | No-account and Free usage available with specified monthly allowances. |
The detailed analysis
The preview API supports raw HTML and references to existing tests, returning screenshots from supported clients and devices. Light and dark modes are separate render variants.
Unspam’s REST workflow creates a test and returns an address; the user sends a real message there and retrieves score and diagnostic details as JSON.
This is a useful integration pattern for an ESP or internal QA portal because it evaluates a submitted message, not just detached HTML. Treat the score as a diagnostic result; it is not a direct census of production subscriber placement.
The preview API supports raw HTML and references to existing tests, returning screenshots from supported clients and devices. Light and dark modes are separate render variants.
A developer can validate display problems independently of sender authentication and placement. Keep screenshot jobs and diagnostic jobs distinct in usage planning, because the pricing model lists them as different services.
Current pricing includes inbox-placement tests, spam checks, device previews, screenshots and heatmaps as separate categories. Custom adds historical results, scheduled Autopilot operation, verification and DMARC monitoring.
This supports a recurring pre-send or monitoring workflow rather than only one-off scoring. Ask how each scheduled action consumes the configured allowance, and preserve the distinction between measured placement, design previews and verification outcomes.
Unspam currently publishes no-account, Free and Custom packaging. Custom rates depend on the configured services; active Custom subscriptions can buy extra credits.
Do not reuse legacy named tiers or fabricate a fixed Custom price. The reviewed page exposes free allowances, but a numeric paid total, currency and configured billing schedule remain unverified.
The API documentation requires a Bearer token and identifies plan-gated access, response codes and rate limiting. The pricing page places full API and MCP access in Custom.
A free browser account should not be assumed to grant production API rights. Keep tokens server-side and handle asynchronous completion and rate-limit errors rather than expecting every preview request to return an immediate screenshot.
Warmy describes gradual warm-up sending and conversational engagement, while Unspam’s reviewed APIs implement test creation, diagnostic retrieval and client screenshots.
Compare Unspam on observable message defects and automated QA integration, and Warmy on its documented reputation-building workflow. Neither a heatmap nor a screenshot measures whether every recipient will receive the campaign in Primary.
The Warmy advantage
From Adeline’s next-step guidance to real engagement and provider-level measurement, Warmy connects the work that separate email tools leave to your team.
Adeline connects authentication, DNS, inbox placement, blocklists, content, engagement and provider signals into one picture. She builds personalized deliverability plans, detects spam risk and explains what to change next.
Personalized timing, volume and pacing, with gradual ramp-up and engagement that includes opens, replies, important markings and moving messages out of spam.
Warmy’s engagement includes real clicks on your links, alongside opens and other natural mailbox interactions.
1M+ real, protected Google Workspace, Microsoft 365, and B2C mailboxes
500,000+ real US seed accounts, desktop and mobile; rotated monthly; speeds up warmup
Included: 5–50 tests/month by tier, with automated testing. Provider-level results distinguish inbox, Promotions and spam, so you can measure progress instead of relying on SMTP acceptance alone.
Domain/IP reputation tracking, blacklist alerts, spam-placement reports
SPF, DKIM, and DMARC tracking, record checks, and DMARC report analysis
Direct Google Postmaster integration
Check address validity as part of the wider deliverability workflow, alongside reputation work, placement testing and monitoring.
AI template optimization, custom warm-up topics and templates, and conversations in 30+ languages.
Multiple mailboxes and domains; 100 to 5,000 warmup emails/day by plan. Auto-archive keeps warm-up conversations out of your working inbox.
Klaviyo, Mailchimp, HubSpot, SendGrid, ActiveCampaign, Google Workspace, Microsoft 365, and SMTP. Self-serve setup in minutes via OAuth or SMTP/IMAP.
Documented API included on every plan. 24/7 human support; dedicated CSM and deliverability consultant on Expert/Platinum.
Allowances and dedicated support vary by plan. Plans starting from $49 / month.
Plans and total cost
| Pricing detail | Warmy | Unspam |
|---|---|---|
| Starting price | $49/ month | Current free and configurable Custom packaging; paid total unverified. |
| Billing | Monthly | Service allowances plus Custom top-up credits |
| Free trial | Seven days, no credit card required | No-account and Free usage available with specified monthly allowances. |
| Also included | Adeline AI, warm-up, placement tests, monitoring, verification and API access; allowances vary by plan. | See the individual features and published plan allowances below. |
Plans starting from $49 / month. See Warmy’s five plans
A mailbox subscription, an address-verification credit, a rendering test and an SMTP sending allowance buy different outcomes. Compare total cost using your own mailbox count, list size, testing frequency and sending volume; do not equate a lower unit price with equivalent coverage.
Social proof
Rated 4.9/5 on G2 and trusted by 35,000+ businesses.
“Warmy has been a game changer for us. The platform pays for itself many times over.”
“If you do cold email, Warmy will increase your efficiency, improve your deliverability, and cut your costs.”
Thomas Tzouridis“I've purchased many marketing tools before. Often, once you buy, you're on your own. With Warmy, they care about you.”
The verdict
| If you want… | Choose |
|---|---|
| Everything in one platformWarm-up, placement tests, verification, authentication and reputation monitoring in one connected workflow. | Warmy |
| Adeline AI expertisePersonalized plans, predictive spam-risk detection and clear next steps from your AI deliverability expert. | Warmy |
| Real engagement and seed accountsA 1M+ mailbox network, real link clicks and 500,000+ US seed accounts. | Warmy |
| Expert help and an easy startSelf-serve setup, API access and 24/7 human support; dedicated consultant options on higher tiers. | Warmy |
| Spam testing through the actual sender: Unspam’s REST workflow creates a test and returns an address; the user sends a real message there and retrieves score and diagnostic details as JSON. | Unspam |
| Rendering and content QA: The preview API supports raw HTML and references to existing tests, returning screenshots from supported clients and devices. Light and dark modes are separate render variants. | Unspam |
| Placement and scheduled monitoring: Current pricing includes inbox-placement tests, spam checks, device previews, screenshots and heatmaps as separate categories. Custom adds historical results, scheduled Autopilot operation, verification and DMARC monitoring. | Unspam |
A practical evaluation
Spam testing through the actual sender: Unspam’s REST workflow creates a test and returns an address; the user sends a real message there and retrieves score and diagnostic details as JSON. Keep that objective separate from your sender-reputation and placement baseline.
Test a representative message with a consistent provider mix. Record authentication, inbox and spam placement before changing the sending workflow.
This is a useful integration pattern for an ESP or internal QA portal because it evaluates a submitted message, not just detached HTML. Treat the score as a diagnostic result; it is not a direct census of production subscriber placement.
Do not reuse legacy named tiers or fabricate a fixed Custom price. The reviewed page exposes free allowances, but a numeric paid total, currency and configured billing schedule remain unverified. Keep specialist tooling where it serves a separate job. Coordinate any overlapping warm-up schedules instead of doubling engagement volume.
Compare provider-level placement alongside specialist results, bounces and complaints. Address validity, rendering previews and SMTP acceptance alone do not prove inbox placement.
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