Alternatives to Requestly
An API client for designing and testing APIs, plus a browser HTTP interceptor for modifying requests. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Requestly
An API client for designing and testing APIs, plus a browser HTTP interceptor for modifying requests.
Replacements
Listings that take over the same core job as Requestly.
Postman
The most widely used API client, for sending HTTP requests, organising them into collections and sharing them with a team.
Postman offers a larger ecosystem of collections, scripts and generated mock servers, but it has no browser interceptor and stores collections in its cloud by default.
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 stores collections as plain files for Git with no cloud sync, but it lacks a browser request interceptor.
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 with REST, GraphQL and gRPC support and optional Git Sync, but it has no browser interception for rewriting requests.
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 MIT-licensed, stores requests as files for git and imports Postman collections, with no telemetry or cloud account, but it has no browser interceptor.
Hoppscotch
A fast API client that runs in a browser tab, with a self-hostable workspace if you want one.
Hoppscotch is an MIT-licensed client that runs in a browser tab and can be self-hosted, though it does not rewrite browser traffic and has fewer testing features.
Thunder Client
Lightweight REST and GraphQL client built into VS Code.
Thunder Client moves API testing into VS Code with collections stored as repository files, but it is tied to the editor and has no request interceptor.
Testfully
An API client for building, testing, documenting and monitoring APIs, usable offline or with cloud storage.
Testfully offers local offline storage or cloud sync plus monitoring, and imports Postman and Insomnia collections, but is proprietary and has no browser interceptor.
Also worth comparing
These listings name Requestly 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.
Requestly stores collections as local JSON files that work with Git, adds a browser interceptor for rewriting requests, and supports GraphQL, SOAP and gRPC.
EchoAPI
An API client for designing, debugging, load testing and documenting APIs, compatible with Postman scripts.
Requestly stores collections as local JSON files, imports Postman collections in one click and adds a browser interceptor, but it is also closed source.
Milkman
An extensible open-source desktop workbench for sending requests and inspecting responses across many protocols.
Requestly stores collections as local JSON files for Git, adds a browser interceptor, and supports GraphQL, SOAP and gRPC, but it is closed source with paid business features.
ModHeader
A browser extension for modifying HTTP request and response headers and cookies while testing.
Requestly's browser interceptor rewrites requests, redirects and headers, and adds an API client, though its focus has shifted toward the API client side.
SoapUI Open Source
An open-source desktop tool for functional testing of SOAP and REST APIs.
Requestly is a closed-source freemium client with SOAP, GraphQL and gRPC support and Git-friendly JSON collections, plus a browser interceptor.
Similar software
Related functionality, not a direct replacement.
HTTP Toolkit
An open-source desktop tool for intercepting, inspecting and rewriting HTTP and HTTPS traffic.
Proxyman
Desktop HTTP and HTTPS debugging proxy for capturing, inspecting and mocking network requests.
Charles
An HTTP and HTTPS debugging proxy that shows all web traffic between a computer and the internet.
Fiddler Everywhere
A cross-platform web debugging proxy for capturing, inspecting, modifying and replaying HTTP(S) traffic.
Mockoon
A desktop app and CLI for designing and running mock REST APIs locally without an account.
