← Communications APIs (CPaaS) ranking
Brand report · September 2026
Postmark: AI Visibility Report
When buyers ask ChatGPT, Claude, and Gemini about communications apis (cpaas), Postmark ranks #15 of 15, a Visibility Score of 2 in Communications APIs (CPaaS) .
These rankings are measured from what the three models know from training, not a live web search. The live-web grounded surface is rolling out across the index. Methodology.
Dead last in its only race, with no wins.
Where it wins. Postmark holds a foothold in Communications APIs (CPaaS), appearing in 5.6% of relevant AI conversations and drawing co-mentions alongside Twilio and Vonage, which at least confirms the models know it exists in that field.
Where it loses. A rank of 15 out of 15 with a score of 2.4 and zero first-pick selections means AI models consistently exhaust every other CPaaS option before landing on Postmark, and seven major prompt themes produce no mentions at all.
AI-generated analysis of the September 2026 measurements.
ChatGPT 
Claude 
Gemini Being named is not the same as being recommended. Each mention is graded endorsed (a strong pick), listed (a neutral option), or caveated (named with a reservation).
Share of each theme's answers that mention Postmark. Hover a row for the exact prompt. Compare shapes on the head-to-head page.
Gaps Best overall · Use-case fit · Top tools in 2026 · Startup & small team · Enterprise pick · Feature-led ask · Budget & alternatives
Share of Postmark's mentions where the AI models name this brand in the same answer. That is the real competitive set in the AI channel.
Scores are measured from real AI answers, refreshed monthly. Methodology.
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