Email testing tools compared

Where inboxsink is the better fit, and where it is not. Every figure about another tool comes from that vendor's own site, linked, with the date it was read.

• A Mailinator alternative with private inboxes that wait

  Mailinator's public inboxes are readable by anyone. inboxsink gives each test a private inbox that waits for the email and returns the code. Checked 13 Sep 2026.

• A smaller MailSlurp alternative for email tests

  MailSlurp vs inboxsink for email tests, prices checked 13 Sep 2026: the free tiers, where MailSlurp does more (SMS, 25+ SDKs), and what a custom domain costs.

• A Mailosaur alternative with a free tier

  Mailosaur and inboxsink both wait for the email and extract the code. Checked 13 Sep 2026: a 14-day trial at Mailosaur, a free tier and a 29 € custom domain here.