Alternatives to Testfully
An API client for building, testing, documenting and monitoring APIs, usable offline or with cloud storage. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Testfully
An API client for building, testing, documenting and monitoring APIs, usable offline or with cloud storage.
Replacements
Listings that take over the same core job as Testfully.
Postman
The most widely used API client, for sending HTTP requests, organising them into collections and sharing them with a team.
Postman is the most widely used API client with collections, scripts, documentation and mock servers, but it effectively requires an account and makes offline use harder.
Insomnia
An API client for REST, GraphQL and gRPC that can keep everything local or sync through Git instead of a cloud.
Insomnia is open source under Apache-2.0, supports local storage or Git sync, and adds REST, GraphQL, gRPC, an OpenAPI editor and a pipeline CLI.
Bruno
An API client that saves collections as plain files in a folder, so Git handles the sharing instead of a cloud account.
Bruno is open source under MIT and offline only, keeping collections as plain files shared through Git rather than offering optional cloud sync or monitoring.
Hoppscotch
A fast API client that runs in a browser tab, with a self-hostable workspace if you want one.
Hoppscotch is open source under MIT, runs in a browser tab or can be self-hosted, but has fewer testing and mocking features and no monitoring.
Yaak
An offline-first API client for REST, GraphQL, gRPC, WebSockets and SSE, with requests stored as files you can commit to git.
Yaak is open source under MIT and offline-first, imports from Postman and Insomnia, stores requests as git-friendly files, but offers no hosted collaboration features.
Apidog
An API platform for designing, debugging, mocking and testing APIs, with desktop and web clients.
Apidog adds API design and mocking to debugging and testing in one freemium platform with desktop and web clients, and is also closed source.
EchoAPI
An API client for designing, debugging, load testing and documenting APIs, compatible with Postman scripts.
EchoAPI works offline without logging in, runs Postman scripts, and adds load testing and plugins for VS Code and IntelliJ IDEA, while remaining closed source.
Requestly
An API client for designing and testing APIs, plus a browser HTTP interceptor for modifying requests.
Requestly stores collections as local JSON files for Git, imports from Postman in one click, and adds a browser interceptor, but is closed source with paid business plans.
Also worth comparing
These listings name Testfully as their own alternative, so the relationship runs both ways.
Apifox
An API platform for designing, debugging, mocking and testing APIs, with desktop and web clients.
Testfully offers building, testing, documenting and monitoring APIs with a choice of offline local storage or cloud sync, and imports from Postman and Insomnia, but is proprietary.
Similar software
Related functionality, not a direct replacement.
Newman
A command-line runner that executes Postman collections outside the Postman app.
Loader.io
Cloud load testing service that simulates many concurrent connections against web apps and APIs.
Step CI
An open-source API test automation framework that runs multi-step workflows written in YAML, JSON or JavaScript.
Webhook.site
A web service that gives you a unique URL and email address to inspect incoming requests.
