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Best Open Source API Platforms

A curated collection of the 9 best open source API Platforms for inspiration and reference. Each listing includes a website screenshot along with a detailed review of its features.

Favicon of Hoppscotch website

Hoppscotch

Sleek, intuitive API development and testing platform

  • Stars

    61,617
  • Forks

    4,276
  • Last commit

    2 weeks ago
Favicon of Insomnia website

Insomnia

Powerful API development and testing made effortless

  • Stars

    33,733
  • Forks

    1,880
  • Last commit

    18 hours ago
Favicon of Bruno website

Bruno

Lightweight, fast, and open-source API client for developers

  • Stars

    22,187
  • Forks

    1,036
  • Last commit

    21 hours ago
Favicon of Lago website

Lago

Open-source metering and usage-based billing platform

  • Stars

    6,501
  • Forks

    277
  • Last commit

    1 day ago
Favicon of Mockoon website

Mockoon

Effortless API mocking for seamless development

  • Stars

    6,118
  • Forks

    354
  • Last commit

    4 days ago
Favicon of Nango website

Nango

Seamless API integrations for modern developers

  • Stars

    4,376
  • Forks

    391
  • Last commit

    18 hours ago
Favicon of ApyHub website

ApyHub

Simplify development with powerful API integrations

  • Stars

    2,291
  • Forks

    81
  • Last commit

    4 days ago
Favicon of Requestly website

Requestly

Intercept, modify, and debug HTTP(S) requests effortlessly

  • Stars

    1,942
  • Forks

    163
  • Last commit

    16 hours ago
Favicon of Firecamp website

Firecamp

Unified API development ecosystem for modern teams

  • Stars

    1,759
  • Forks

    114
  • Last commit

    2 months ago
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