Postman changed the math in March 2026 when it cut its free plan to a single user. No more inviting teammates to a free workspace, no more sharing collections without paying — collaboration now starts at $19 per user per month on the Team plan. A 5-person team pays $95 a month, or $1,140 a year, just to do together what they used to do free.
Solo developers are not untouched either. The free tier caps you at 25 collection runs a month, and if you test APIs more than a few times a day you will burn through that within a week. The timing is awkward, but the market has responded: the open-source API clients of 2026 are mature enough that switching is not a downgrade. Here is an honest breakdown of eight free alternatives, what each one does well, and where the catch is.
1. Bruno — the Git-native pick
Bruno is the tool most ex-Postman users land on, and it is easy to see why. It is fully open source under the MIT licence, and it stores every request as a plain-text .bru file in your project directory. Your API collections live next to your code, so they get versioned, diffed, reviewed, and merged through Git like everything else.
That design choice fixes the single most annoying thing about Postman: your collections are locked inside someone else's cloud. With Bruno, there is no account required, no cloud sync you have to opt into, and nothing leaves your machine. It runs offline-first, supports REST, GraphQL, WebSocket and gRPC requests, environment variables, and pre/post-request scripts in JavaScript.
The honest trade-offs: Bruno has no mock server, no auto-generated documentation, and no visual API design editor. It is a request client first and foremost, not a full API lifecycle platform. If your workflow is "build requests, run tests, commit everything to Git," that is not a compromise — it is the point. Bruno also ships a paid Golden Edition with team-oriented features, but the free edition covers the entire core testing workflow without limits.
Best for: developers who want their API collections in Git and their data on their own machine.
2. Hoppscotch — zero install, runs in the browser
Hoppscotch opens in a browser tab and starts working immediately. No download, no installer, no account dance before your first request. It supports REST, GraphQL, WebSocket, Server-Sent Events, and MQTT, which makes it one of the few free tools that handles realtime protocols natively.
The open-source version is genuinely free, and you can self-host it if you would rather your requests never touch someone else's infrastructure. On the hosted cloud version, individual use is free with unlimited requests. The paid cloud plans, starting around $6 per user per month, gate team collaboration features — so a small team sharing collections in real time will either pay or self-host.
The trade-off is privacy by default: a browser-based client sends requests from your browser, which is fine for public endpoints but worth thinking about before pasting production bearer tokens into a hosted tab. For quick exploratory testing and sharing a one-off request link with a colleague, nothing beats it.
Best for: quick testing, sharing request links, and realtime protocols without installing anything.
3. Insomnia — the closest feel to classic Postman
Insomnia, maintained by Kong, is the mature option. It is open source under the Apache-2.0 licence, has the cleanest interface of any desktop API client, and its GraphQL support is arguably the best of the bunch — full schema introspection, query autocompletion, and a proper document explorer rather than a bare text box.
The free tier covers unlimited private projects for individuals, which makes it a comfortable home for a solo developer's entire API workflow. The friction point is Kong's cloud-first direction: syncing and team collaboration features run through Kong's commercial services, so a team that needs shared workspaces with access control ends up on a paid plan from around $8 per user per month.
One thing to be aware of: Insomnia's plugin ecosystem pulls from npm, and after the March 2026 Axios supply chain incident, teams with strict compliance requirements should review plugin trust carefully. For most individual developers that is a non-issue, but it is worth knowing.
Best for: solo developers who want a polished desktop client with first-class GraphQL support.
4. Yaak — the creator's offline reboot
Yaak is built by Gregory Schier, the original creator of Insomnia, after Kong's cloud-first pivot. It is the purist's tool: offline-first, zero telemetry, and built-in secret encryption for Git. Collections live as files on your machine, no account is ever required, and it imports Postman collections and environments directly, which makes migration nearly painless.
The licensing needs a read before you roll it out at work: Yaak is free for personal use, but commercial use requires a licence after a trial. The source is available, but the binaries are not freely redistributable for business use. It also skips the platform extras — no mock server, no CI/CD runner, no built-in documentation generator, no team collaboration.
Best for: individuals who want a fast native client with strong privacy defaults and no cloud of any kind.
5. Thunder Client — API testing inside VS Code
Thunder Client lives in the VS Code sidebar, which means your API testing happens exactly where your code does. There is no alt-tabbing to a separate app; the request you just built sits next to the route handler you are debugging. The free tier covers full REST testing, and it syncs with Git so your collections travel with your repo.
The free tier is real but bounded: advanced features and team sync require the Pro plan, which runs roughly $36 to $192 per user per year depending on licensing. It is also VS Code only — if you ever move editors, your workflow moves with the extension's availability. Thunder Client skips CI/CD integration entirely, so automated regression runs need a different tool.
Best for: developers who live in VS Code and want request testing one keystroke away from their code.
6. Apidog — the all-in-one with a free team plan
Most free API tools cap collaboration the moment a second person joins. Apidog's differentiator is structural: its free plan supports up to 4 users with real-time collaboration, a visual OpenAPI editor, auto-generated interactive documentation, and a smart zero-config mock server. It covers design, debugging, mocking, testing, and documentation in one workspace, which is the full Postman lifecycle rather than just the request client slice.
The cost comparison is stark: where a 3-person team costs $684 a year on Postman after the March 2026 pricing change, the same team pays nothing on Apidog's free plan. The limits appear as the team grows — paid plans start around $10 to $14 per user per month — and the tool is proprietary, not open source, so your collections live in Apidog's cloud.
Best for: small teams that need real collaboration, docs, and mocking without paying per seat.
7. HTTPie Desktop — for CLI lovers
HTTPie started as the friendliest HTTP command-line client, and the desktop app carries that simplicity into a GUI. It is free for individuals, with syntax highlighting, intuitive request building, and support for REST and GraphQL. If you already reach for httpie in the terminal, the desktop app feels immediately familiar.
The desktop edition is newer and thinner on ecosystem integrations than the established players. Paid tiers exist for teams and commercial use, so check the licence terms before deploying it company-wide. For an individual developer who values a clean, minimal interface over a feature checklist, it is a pleasant daily driver.
Best for: developers who already love HTTPie's CLI and want the same simplicity with a mouse.
8. curl (plus jq) — the automation baseline
Every serious API workflow ends up here. curl is free, universal, scriptable, and already installed on nearly every machine you own. Paired with jq for JSON parsing, it covers everything from smoke tests to full CI regression suites. Nothing here depends on a vendor's pricing page, ever.
The honest part: curl has no GUI, no collection management, and no response visualization. You will write your own scripts, and you will maintain them. That is the trade for total control and zero cost. Many developers use a GUI client for exploration and curl for automation, which is the right split for most projects.
Best for: CI pipelines, scripted smoke tests, and anywhere you need automation without dependencies.
How to choose in one minute
Match the tool to the constraint that actually hurts you:
- Postman's per-seat cost hurts → Bruno (free, offline) or Apidog (free team of 4 with docs and mocks).
- You just want to fire off a request fast → Hoppscotch in the browser, or Thunder Client in VS Code.
- GraphQL is your daily work → Insomnia for the introspection and autocompletion.
- Privacy is the whole point → Bruno or Yaak, both offline-first with local files.
- It must run in CI → curl plus jq, or a scriptable client, since GUI tools rarely belong in a pipeline.
The migration wave is real: Postman's March 2026 change turned a convenience switch into a budget decision, and the free alternatives have had time to mature past "good enough." Pick the one that matches your constraint, import your Postman collections — nearly all of these import Postman exports directly — and keep your API work where it belongs: under your control.