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Who AI recommends

Who AI recommends for email platforms for SaaS

We asked ChatGPT, Gemini, Perplexity and Claude 5 buyer questions about email platforms for SaaS and counted who each one named. Checked October 15, 2026. AI answers change, so treat this as a snapshot.

What stands out

  • Postmark was named most, in 17 of 20 answers.
  • Only one engine named HubSpot Email Marketing (ChatGPT), MailerSend (Perplexity), Sequenzy (Perplexity), so which assistant a buyer uses changes who they hear about.
  • HubSpot, Loops, Resend appeared in some answers but not most. That is the gap a brand can close with clearer pages.

Named most often

Out of 20 answers. A name counts once per answer.

  1. 1Postmark17 of 20 answers · Gemini, Perplexity, Claude and ChatGPT
  2. 2Amazon SES14 of 20 answers · ChatGPT, Gemini, Perplexity and Claude
  3. 3SendGrid14 of 20 answers · ChatGPT, Gemini, Perplexity and Claude
  4. 4Brevo11 of 20 answers · Gemini, Perplexity and Claude
  5. 5Customer.io11 of 20 answers · Gemini, Perplexity, Claude and ChatGPT
  6. 6HubSpot8 of 20 answers · ChatGPT, Gemini and Perplexity
  7. 7Loops8 of 20 answers · Perplexity and Claude
  8. 8Resend8 of 20 answers · Gemini, Perplexity and Claude
  9. 9Sendinblue8 of 20 answers · ChatGPT and Gemini
  10. 10Transactional Email Platforms7 of 20 answers · ChatGPT and Gemini

The questions we asked

Best email marketing and transactional email platforms for SaaS

  • ChatGPT: Transactional Email Platforms, Mailchimp, Strengths, HubSpot Email Marketing, HubSpot, ActiveCampaign, Sendinblue, ConvertKit
  • Gemini: Transactional Email Platforms, Customer.io, Brevo, Sendinblue, Postmark, Resend, SendGrid, Amazon SES
  • Perplexity: Customer.io, Resend, Postmark, SendGrid, Loops, Amazon SES, HubSpot
  • Claude: Resend, Postmark, SendGrid, Amazon SES, Customer.io, Loops

Which email marketing and transactional email platforms for SaaS would you recommend for a startup?

  • ChatGPT: Transactional Email Platforms, Mailchimp, Sendinblue, MailerLite, HubSpot Email Marketing, HubSpot, SendGrid, Amazon SES
  • Gemini: Customer.io, Brevo, Sendinblue, Mailchimp, Postmark, ActiveCampaign, ConvertKit, Resend
  • Perplexity: Loops, Postmark, Brevo, SendGrid, Sequenzy
  • Claude: Resend, Postmark, Loops, Brevo

What are the best email marketing and transactional email platforms for SaaS?

  • ChatGPT: Transactional Email Platforms, Mailchimp, Strengths, ActiveCampaign, HubSpot, ConvertKit, SendGrid, Amazon SES
  • Gemini: A. Customer.io, Customer.io, B. Brevo, Brevo, Sendinblue, C. HubSpot, HubSpot, Postmark
  • Perplexity: Brevo, Loops, Postmark, SendGrid, Sequenzy, HubSpot
  • Claude: Postmark, SendGrid, Mailgun, Amazon SES, Customer.io, Klaviyo

Top email marketing and transactional email platforms for SaaS in 2026

  • ChatGPT: Transactional Email Platforms, Sendinblue, Strengths, Postmark, Amazon SES, Customer.io, Braze, Mailgun
  • Gemini: Transactional Email Platforms, Strengths, Customer.io, 2026 Edge, Resend, Brevo, Sendinblue, HubSpot
  • Perplexity: Customer.io, Brevo, SendGrid, MailerSend, Postmark, Mailjet, Amazon SES
  • Claude: Resend, Postmark, SendGrid, Amazon SES, Customer.io, Loops

Best affordable email marketing and transactional email platforms for SaaS

  • ChatGPT: Transactional Email Platforms, Mailgun, Type, SendGrid, MailerLite, Moosend, Postmark, Amazon SES
  • Gemini: A. Brevo, Brevo, Sendinblue, Transactional Features, Starter, B. MailerLite, MailerLite, Growing Business
  • Perplexity: Brevo, Loops, MailerSend, Postmark, Amazon SES
  • Claude: Amazon SES, Resend, Brevo, Mailgun, Loops

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  • How many AI answers name you, with the real answers shown
  • Who AI picks instead, and the reasons it gives
  • Ready-to-paste fixes for your site

How this was made: each question was sent to the engines named above, once, with no browsing on ChatGPT. Names are taken from the answers as written. More categories.