🛠️ dev tools

Testfully costs $25/mo.
These cost $0.

11 free alternatives to Testfully, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.

⚡ Quick Verdict · 2027 Guide

The top-rated free, open-source replacement for Testfully is Hoppscotch (MIT Open Source). Across this category, 4 self-hostable tools are available (including Hoppscotch and Insomnia). Switching a 5-person team saves up to $1,500/year compared to Testfully's $25/mo subscription.

The catch: Requires self-hosting setup, updates, and server maintenance compared to managed Postman.

See the 11 picks ↓

Testfully vs Free Alternatives

Quick side-by-side comparison · $0/mo vs $25/mo

Alternative	Type	License	Where It Runs	Stars	Head-to-Head
Hoppscotch	open source	MIT	Self-host	★ 80.8k	Testfully vs Hoppscotch →
Bruno	open source	Open Source	Local	★ 48.3k	Testfully vs Bruno →
Insomnia	open source	Apache-2.0	Self-host	★ 40.1k	Testfully vs Insomnia →
Yaak	open source	Open Source	Local	★ 19.5k	Testfully vs Yaak →
Scalar	open source	Open Source	Self-host	★ 16.4k	Testfully vs Scalar →
Mockoon	open source	Open Source	Local	★ 8.5k	Testfully vs Mockoon →
Requestly	open source	Open Source	Self-host	★ 6.8k	Testfully vs Requestly →
HTTPie	open source	Open Source	Local	★ 4.1k	Testfully vs HTTPie →
Firecamp	open source	Open Source	Local	★ 2.6k	Testfully vs Firecamp →
Voiden	open source	Open Source	Local	★ 1.8k	Testfully vs Voiden →
Chapar	open source	Open Source	Local	★ 729	Testfully vs Chapar →

The picks

11 open source · ranked by fit

01
Hoppscotch
open sourceMITSelf-host
80.8knov 2026
Lightweight, fast, and feature-rich API client for developers. Test, debug, and document APIs with ease in a clean, modern interface.
The catch vs Testfully
Requires self-hosting setup, updates, and server maintenance compared to managed Postman.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/hoppscotch/hoppscotch or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit hoppscotch.com ↗Source Compare vs Testfully →also replaces 3 other apps →
02
Bruno
open sourceOpen SourceLocal
48.3knov 2026
A modern, user-friendly API client that simplifies API testing and development with a clean interface and powerful features.
The catch vs Testfully
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/usebruno/bruno or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit usebruno.com ↗Source Compare vs Testfully →also replaces 2 other apps →
03
Insomnia
open sourceApache-2.0Self-host
40.1knov 2026
Intuitive API client for REST, GraphQL, and gRPC. Debug, test, and collaborate on APIs with ease across platforms.
The catch vs Testfully
Requires self-hosting setup, updates, and server maintenance compared to managed Postman.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/Kong/insomnia or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit insomnia.rest ↗Source Compare vs Testfully →also replaces 3 other apps →
04
Yaak
open sourceOpen SourceLocal
19.5knov 2026
A modern API client offering local-only data storage, Git integration, plugin extensibility, and multi-protocol support for developers.
The catch vs Testfully
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/yaakapp/app or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit yaak.app ↗Source Compare vs Testfully →also replaces 2 other apps →
05
Scalar
open sourceOpen SourceSelf-host
16.4knov 2026
Scalar is an open-source tool for building, customizing, and hosting interactive API documentation with OpenAPI support.
The catch vs Testfully
Requires self-hosting setup, updates, and server maintenance compared to managed Testfully.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/scalar/scalar or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit scalar.com ↗Source Compare vs Testfully →also replaces 1 other app →
06
Mockoon
open sourceOpen SourceLocal
8.5knov 2026
Create, run, and share mock REST APIs without coding. Boost productivity with an intuitive interface and powerful features.
The catch vs Testfully
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/mockoon/mockoon or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit mockoon.com ↗Source Compare vs Testfully →
07
Requestly
open sourceOpen SourceSelf-host
6.8knov 2026
A powerful browser extension and desktop app for developers to manipulate network requests, debug APIs, and improve web app testing
The catch vs Testfully
Requires self-hosting setup, updates, and server maintenance compared to managed Testfully.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/requestly/requestly or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit requestly.com ↗Source Compare vs Testfully →
08
HTTPie
open sourceOpen SourceLocal
4.1knov 2026
Intuitive, user-friendly CLI tool for making HTTP requests, debugging APIs, and testing web services with ease and efficiency.
The catch vs Testfully
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/httpie/desktop or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit httpie.io ↗Source Compare vs Testfully →
09
Firecamp
open sourceOpen SourceLocal
2.6knov 2026
All-in-one platform for API testing, documentation, and collaboration, simplifying the entire API development lifecycle.
The catch vs Testfully
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/firecamp-dev/firecamp or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit firecamp.io ↗Source Compare vs Testfully →
10
Voiden
open sourceOpen SourceLocal
1.8knov 2026
Offline-first API workspace that unifies specs, docs, tests, and mocks in programmable Markdown blocks. Version control everything in plain text files.
The catch vs Testfully
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/voidenhq/voiden or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit voiden.md ↗Source Compare vs Testfully →also replaces 1 other app →
11
Chapar
open sourceOpen SourceLocal
729nov 2026
Cross-platform API client offering fast, secure, and offline testing for REST and gRPC services. Available on macOS, Windows, and Linux with intuitive design.
The catch vs Testfully
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/chapar-rest/chapar or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit chapar.rest ↗Source Compare vs Testfully →also replaces 2 other apps →

Testfully Head-to-Head Comparisons (2027)

Side-by-side trade-off breakdowns · 11 free alternatives

Testfully vs HoppscotchMIT · Self-host →

Testfully vs BrunoOpen Source · Local →

Testfully vs InsomniaApache-2.0 · Self-host →

Testfully vs YaakOpen Source · Local →

Testfully vs ScalarOpen Source · Self-host →

Testfully vs MockoonOpen Source · Local →

Testfully vs RequestlyOpen Source · Self-host →

Testfully vs HTTPieOpen Source · Local →

Testfully vs FirecampOpen Source · Local →

Testfully vs VoidenOpen Source · Local →

Testfully vs ChaparOpen Source · Local →

Frequently Asked Questions

Direct answers · Testfully open-source replacements

What is the best free alternative to Testfully?+

The top free alternative to Testfully is Hoppscotch (open source, MIT). Lightweight, fast, and feature-rich API client for developers. Test, debug, and document APIs with ease in a clean, modern interface. Other popular Testfully replacements include Bruno, Insomnia, Yaak.

Can I self-host a free replacement for Testfully?+

Yes. Of the 11 free alternatives to Testfully, 4 can be self-hosted on your own server or local machine: Hoppscotch (MIT), Insomnia (Apache-2.0), Scalar (Open Source), Requestly (Open Source).

How much does switching from Testfully to a free alternative save?+

Testfully starts at $25/month per seat ($300/year). Switching a 5-person team to a free alternative like Hoppscotch saves $1,500 per year in software subscription fees.

Should I vibe-code or build my own Testfully clone from scratch?+

Our build verdict for Testfully is NO (use a free alternative, save the tokens). Instead of paying recurring SaaS fees for Testfully or rebuilding it from scratch, deploy one of the 11 battle-tested open-source alternatives like Hoppscotch.

What is the catch when switching from Testfully to Hoppscotch?+

Requires self-hosting setup, updates, and server maintenance compared to managed Postman.