About
Postmark is a reliable transactional email service with industry-leading deliverability — long-running indie SaaS now part of ActiveCampaign.
Postmark
Developer ToolsEmail service for transactional and marketing email.
Listed May 25, 2026Updated Jul 4, 2026
Frequently asked
What is Postmark?
Email service for transactional and marketing email. Postmark is a reliable transactional email service with industry-leading deliverability — long-running indie SaaS now part of ActiveCampaign.
What category is Postmark in?
Postmark is listed under Developer Tools on Startup Spotlight, a directory of indie and micro-startups.
When was Postmark founded?
Postmark was founded in 2010.
Where can I visit Postmark?
You can visit Postmark at postmarkapp.com, or view its full profile on Startup Spotlight.
Standalone answers: What is Postmark? · When was Postmark launched?
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