Marketers can't predict whether a campaign will hit spam before sending, and low deliverability gives no clear reason — only trial and error. Free tools give a score but no fixes.
Email marketers and cold outreach teams
Tiered by volume: $19/mo (500 checks), $49/mo (3,000), $99/mo team; usage-based API overage; $29 one-off deep audit report.
Unspam tackles email validation and deliverability with an API-first model, but leans on validation rather than a full loop of content scoring, sender-authentication diagnosis and itemized fix advice — costly for small teams to adopt.
A pre-send email spam-score checker and sender-authentication auditor for marketing and cold-outreach teams — returns a score plus concrete fix recommendations, exposed as an API for SaaS products to embed.
Marketers can't predict whether a campaign will hit spam before sending, and low deliverability gives no clear reason. Free tools return a bare score or only check SPF/DKIM — they don't say what to change, and offer no embeddable API.
Cold outreach teams, SaaS lifecycle and growth marketers, and technical teams that need deliverability checks inside their own product.
The source signal shows the competitor is API-driven but leans toward email validation rather than pre-send diagnosis, leaving a gap for "diagnose + fix + API." SpamAssassin rules are open source, so a solo developer can build a credible scorer cheaply, and paid deliverability tools already prove willingness to pay.
Tiered by check volume: $19/mo (500 checks), $49/mo (3,000), $99/mo team; usage-based API overage; $29 one-off deep audit report. Pricing inferred from comparable deliverability tools — needs research.
Medium. Scoring can be built on Apache SpamAssassin rules plus a custom rule set; authentication checks use DNS lookups (SPF/DKIM/DMARC/blocklists). Hard parts: score accuracy, false-positive control, and analyzing rendered HTML.