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Transactional email APIs

Brevo vs MailerSend

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

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Brevo comes out ahead here, with an overall score of 23 versus MailerSend's 10, and it shows up in 20 of 62 answers compared to MailerSend's 10. Head-to-head, Brevo is named more often on 8 questions, MailerSend on 2, with 10 ties. Brevo scores best with Perplexity (34) and does well on questions about free tiers, marketing-plus-email APIs, and EU data hosting, each at 3 of 3 answers. MailerSend's strongest showings are on cheap transactional email at scale and startup picks, both 2 of 3. Neither is ever named for deliverability or self-hosted email questions.

Head to head

metricBrevoMailerSend
score2310
questions won108

By assistant

Brevo

assistantscorenamed in, this weekusual spot, this week
ChatGPT1415% of answers#1.3
Claude2135% of answers#5.3
Gemininot sampled this week
Perplexity3445% of answers#3.1

MailerSend

assistantscorenamed in, this weekusual spot, this week
ChatGPT00% of answers
Claude2135% of answers#5.7
Gemininot sampled this week
Perplexity1115% of answers#3.7

Where they differ

Only Brevo gets named for

  • What's the best email API that also handles marketing campaigns?
  • What's the best email service for sending receipts and order confirmations?
  • What's the best email API for developers?
  • What's the best email API for a Next.js or serverless app?

Only MailerSend gets named for

  • What's the cheapest way to send transactional email at scale?
  • What's the best transactional email provider for high volume at low cost?

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