Every tool in one place.
All tools are free to use. No signup required for your first checks. Pro and Agency tiers unlock higher limits, automation, and ESP integrations.
Signal Score
All 7 inbox signals scored, tracked, and acted on. The single best predictor of your next campaign's performance.
FlagshipWhy Am I in Spam?
One diagnostic. Top 3 reasons your emails are landing in spam, ranked and ready to fix.
FreeCopy Intelligence
100-point copy score, spam risk, readability, framework detection, and AI rewrites. No sending required.
FreeList Rescue
Upload any list. We triage it: Remove, Re-engage, or Keep, with reason codes for every contact.
FreeSender Check
6 auth protocols, 110 blocklists, A-F grade, and copy-paste DNS fix records.
FreeInboxer Send Test
Send a real email to our test address and get a full deliverability report with header analysis.
FreePlacement Test
Predict whether your email will land in Inbox, Promotions, or Spam across major providers.
FreeSubject Intelligence
Score your subject line for open rate potential, spam triggers, and emotional resonance.
FreeSignal Verifier
Validate individual email addresses with MX check, disposable detection, and deliverability prediction.
FreeReputation Watch
Monitor your domain and IP across 110+ blocklists. Get alerted before your reputation drops.
FreeHeader Analyzer
Paste raw email headers and get a human-readable breakdown of routing, authentication, and delays.
FreeFramework Lab
16 proven copywriting frameworks with examples. Detect which framework an email uses, or rewrite into a new one.
FreeBIMI Checker
Check if your domain has a BIMI record and preview how your logo appears in supporting inboxes.
FreeDomain Signal Check
Batch-check multiple domains at once. Get auth standing and reputation scores for your entire portfolio.
Free