Does AI recommend Postmark?

Across 6 AI models, Postmark is the first email pick in 37% of answers (#2 of 3) and is mentioned in 100%. It is installed in 0% of the apps the models build. Leader: Resend 61%.

37%

Recommended as the top pick

#2 of 3 · Leader: Resend 61%

100%

Mentioned at all

Named anywhere in the recommendation

Adopted in generated code

not ranked · Leader: Resend 55%

Gap. Models mention Postmark in 100% of answers, but pick it first in only 37%.

Gap. Models recommend Postmark first in 37% of answers, but install it in only 0% of the apps they build.

What AI recommends first for email

Share of 180 answers across 6 models

Resend

61%

Postmark

37%

Amazon SES

Used in AI-built apps

Share of 120 answers across 6 models

Resend

55%

Nodemailer (SMTP)

32%

Buttondown

Mailchimp

Postmark

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Results for each of the 6 models and each developer context, who gets picked instead, and real excerpts of AI answers. Free, by email.

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Measured 2026-10-01 with claude-sonnet-5.5, gpt-6.1-sol, gemini-3.8-flash, grok-4.7, deepseek-v4.1-flash, qwen3.8-max-prime, 5 runs per recommendation prompt and 5 per build prompt, via public APIs with no system prompt. Methodology. DefaultRank is independent and not affiliated with any tool vendor or model provider.