R.I.P.

Open-source alternatives to Testfully

9 open-source options for Testfully, the API client. Compare alternatives to paid apps below. 8 shipped code in the last 30 days.

Testfully$14/user/mo

9 open-source alternatives

Most-starred first. Stars and growth come from GitHub; activity comes from the project's code host.

Hoppscotch

Most starred

Sleek, intuitive API development and testing platform

Stars: 80.7k
Growth: +284
Launched: Aug 2019

MITupdated today

Bruno

Recent growth

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

Stars: 48k
Growth: +883
Launched: Sep 2022

MITupdated today

Insomnia

#3 by stars

Powerful API development and testing made effortless

Stars: 40.1k
Growth: +76
Launched: Apr 2016

Apache-2.0updated 1d ago

Yaak

#4 by stars

Fast, secure, offline API client with Git integration

Stars: 19.4k
Growth: +153
Launched: Feb 2023

MITupdated today

Scalar

#5 by stars

Open-source API documentation and testing platform

Stars: 16.4k
Growth: +198
Launched: Aug 2023

MITupdated today

Mockoon

#6 by stars

Effortless API mocking for seamless development

Stars: 8.5k
Growth: +50
Launched: Jul 2017

MITupdated 1d ago

Requestly

#7 by stars

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

Stars: 6.8k
Growth: +4
Launched: Dec 2016

Custom licenseupdated 1d ago

Firecamp

#8 by stars

Unified API development ecosystem for modern teams

Stars: 2.6k
Growth: +8
Launched: May 2023

AGPL-3.0updated 8mo ago

Voiden

Recently created

Build APIs like code with Git-native workspace

Stars: 2k
Growth: +195
Launched: May 2025

Apache-2.0updated 2d ago

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9 open-source alternatives

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