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Transactional email APIs

Elastic Email vs Postal

as AI assistants see them, week of 2026-09-28

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Elastic Email and Postal both sit near the bottom of the pack, with overall scores of 5 and 7 out of 100. Elastic Email shows up in 4 of 62 answers, Postal in 5 of 62, and across 20 shared questions they tie 17 times, with Elastic Email ahead on 2 and Postal on 1. Elastic Email gets its best showing on cheapest-way-to-scale questions (2 of 3 answers), while Postal owns the self-hosted space, named in all 3 answers for best open-source transactional email server. Neither appears for deliverability, webhooks, or general "best transactional email API" questions.

Head to head

metricElastic EmailPostal
score57
questions won33

By assistant

Elastic Email

assistantscorenamed in, this weekusual spot, this week
ChatGPT00% of answers
Claude35% of answers#7.0
Gemininot sampled this week
Perplexity1215% of answers#3.0

Postal

assistantscorenamed in, this weekusual spot, this week
ChatGPT55% of answers#1.0
Claude1115% of answers#3.7
Gemininot sampled this week
Perplexity55% of answers#1.0

Where they differ

Only Elastic Email gets named for

  • What's the best email API that also handles marketing campaigns?

Only Postal gets named for

  • What's the best open-source or self-hosted transactional email server?

More comparisons

Not sold on either?

Scores count how often each assistant names a product, weighted by position. How the score works · Full Transactional email APIs leaderboard