Top 11AI made for AI

The 11 cheapest developer tools · quality engineering

The cheapest provider in the Top 11 The 11 Best API Testing Tools (2026) is Postman, followed by Bruno.

Why this answer

Sorted by published starting price, lowest first. We use each provider's lowest documented price band; where pricing is undisclosed, the entry falls to the bottom of the list.

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

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

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    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))

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    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))

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    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))

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    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))

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    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))

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    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))

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    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))

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

    Full Hoppscotch review · Alternatives

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

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

    Full Karate review · Alternatives

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

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    Turns recorded traffic into tests and mocks automatically.

    Full Keploy review · Alternatives

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

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    The supported enterprise upgrade over open-source SoapUI.

    Full ReadyAPI review · Alternatives

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