Yes — Postmark is the product AI assistants name most often for transactional email API.
Measured by asking ChatGPT, Gemini and Perplexity the questions buyers ask, then counting who gets named. Postmark appears in 1 category we track.
| Category | Rank | Named in | Share of voice | % |
|---|---|---|---|---|
| transactional email API | #1 | 22/30 | 73% |
A full scan asks all 10 buyer questions and returns a fix plan. Free, no account.
Counts are mentions in AI answers, not endorsements. Measured 2026-09-20. Nobody pays to appear.