Top 11AI made for AI

The 11 highest-rated developer tools · quality engineering

The highest-rated provider in the Top 11 The 11 Best API Testing Tools (2026) is Postman at 9.2/9.4, followed by Bruno (8.8/9.4).

Why this answer

Sorted by our 9.4-point composite score across 6 weighted criteria (see /methodology). Identical to the canonical ranking when the canonical ranking is also score-ordered.

Showing the top 11 of 11+ screened. Methodology at /methodology.

  1. #1Postman(rank #1 in The 11 Best API Testing Tools (2026))

    9.2/9.4

    The most complete option for teams that need authoring, automation, and CI in one place.

    Full Postman review · Compare: Postman vs Bruno · Alternatives

  2. #2Bruno(rank #2 in The 11 Best API Testing Tools (2026))

    8.8/9.4

    The git-first choice that keeps API tests in your repo, not a vendor cloud.

    Full Bruno review · Alternatives

  3. #3Insomnia(rank #3 in The 11 Best API Testing Tools (2026))

    8.6/9.4

    A clean, fast client with excellent GraphQL and gRPC handling.

    Full Insomnia review · Alternatives

  4. #4Apidog(rank #4 in The 11 Best API Testing Tools (2026))

    8.5/9.4

    An all-in-one that folds design, mocking, and testing together.

    Full Apidog review · Alternatives

  5. #5SoapUI(rank #5 in The 11 Best API Testing Tools (2026))

    8.3/9.4

    The default when SOAP and legacy enterprise services are in scope.

    Full SoapUI review · Alternatives

  6. #6Katalon(rank #6 in The 11 Best API Testing Tools (2026))

    8/9.4

    One platform for API, web, and mobile test automation.

    Full Katalon review · Alternatives

  7. #7Testsigma(rank #7 in The 11 Best API Testing Tools (2026))

    7.8/9.4

    Plain-English test authoring with an open-source edition.

    Full Testsigma review · Alternatives

  8. #8Hoppscotch(rank #8 in The 11 Best API Testing Tools (2026))

    7.6/9.4

    The instant-loading, self-hostable open-source client.

    Full Hoppscotch review · Alternatives

  9. #9Karate(rank #9 in The 11 Best API Testing Tools (2026))

    7.5/9.4

    One readable syntax for API, contract, and load tests in code.

    Full Karate review · Alternatives

  10. #10ReadyAPI(rank #10 in The 11 Best API Testing Tools (2026))

    7.4/9.4

    The supported enterprise upgrade over open-source SoapUI.

    Full ReadyAPI review · Alternatives

  11. #11Keploy(rank #11 in The 11 Best API Testing Tools (2026))

    7.1/9.4

    Turns recorded traffic into tests and mocks automatically.

    Full Keploy review · Alternatives

Methodology: /methodology · No paid placement ever · Verified .