P
Postmark
Transactional Email 🏢 Acquired by ActiveCampaignPostmark was acquired by ActiveCampaign. The original domain redirects to the parent company — this is expected behaviour, not a shutdown signal.
Warning
Get alerts before this vendor breaks your stack.
Monitor your full stack — freeFree plan · No credit card required · Setup in 60 seconds
76
/100
Health Score
🔒 Full Signal Breakdown
Deep signals — hiring velocity, funding activity, leadership changes, deprecation notices — are available to SunsetRadar subscribers.
🔒 Hiring Velocity Signal
🔒 Funding & Runway Analysis
🔒 Leadership Stability Score
🔒 Deprecation Notices
🔒 30-Day Trend Chart
🔒 Migration Playbook
Migration Playbook
Watch List — Health score is below optimal. No immediate action required, but start planning.
No scored alternatives in this category yet.
Migration Timeline EstimateMigrations in the Transactional Email category typically take 2–8 weeks depending on integration depth, data volume, and team bandwidth. The full playbook includes data export guidance, API compatibility notes, and step-by-step migration checklists.