Directory · not scored
Deliverability testing tools 12
Tools that show where your mail lands (inbox, promotions or spam), check DNS authentication and monitor blocklists.
Not a ranking yet: these tools do a different job from inbox providers, so our scoring would compare them unfairly. We list what we found on their sites (checked on Oct 5, 2026) and will publish a separate method for this category. Alphabetical order.
| Tool | Inbox placement or spam tests | Ongoing warm-up included in the price | Public API | Official MCP server | Free plan, free trial or money-back guarantee | Prices published on the site | Entry price |
|---|---|---|---|---|---|---|---|
 Allegrowallegrow.co | $99/mo | ||||||
 EmailGuardemailguard.io | $49/mo | ||||||
| EEvaWarmevawarm.com | — | ||||||
 Folderlyfolderly.com | $79/mo | ||||||
 GlockAppsglockapps.com | $85/mo | ||||||
 mail-testermail-tester.com | — | ||||||
 MailBracemailbrace.com | — | ||||||
 MailGeniusmailgenius.com | $23/mo | ||||||
 MxToolboxmxtoolbox.com | $129/mo | ||||||
 Postbox Servicespostboxservices.com | — | ||||||
 Unspamunspam.email | $5/mo | ||||||
 Validity Everest / Engagevalidity.com | — |
stated on the tool's site · the site says it is not offered · not found.
Other directories: Warm-up tools · AI SDR · Email for AI agents