Postman vs Insomnia vs Bruno: Best API Client for Developers Compared
Three API clients dominate the conversation among developers in 2025: Postman, Insomnia, and Bruno. Each takes a fundamentally different stance on how your API workflow should work—and where your data should live.
The choice matters more than it used to. Postman’s 2023 decision to retire its Scratch Pad and push users toward cloud-synced workspaces triggered a visible backlash, and Insomnia’s 2023 account requirement did the same. Bruno arrived in 2022 with a direct answer to both: a Git-friendly, offline-first client. Meanwhile, Postman’s own 2024 “State of the API” report found that 51% of developers now work on APIs daily, making the client you open every morning a genuine productivity decision rather than a matter of habit.
Here’s how the three compare on the things that actually affect day-to-day work.
The Core Difference: Where Your Collections Live
Before comparing features, understand the architectural split, because it drives almost everything else.
- Postman is cloud-first. Collections sync to Postman’s servers by default, with team collaboration, sharing, and governance built around that model. Local-only storage exists, but it’s no longer the default experience.
- Insomnia is also account-oriented. Since the 2023 changes, you need an account to use the app, and cloud sync is the primary path, though local vaults remain available.
- Bruno is local-first and file-based. Every collection is a folder of plain-text
.brufiles on your disk. You commit them to Git like source code. There is no mandatory account and no cloud dependency.
If your team treats API collections as code—reviewed in pull requests, versioned alongside the services they test—Bruno’s model is a structural advantage, not just a preference. If you need a shared workspace where a PM can click into a collection without cloning a repo, Postman’s model wins.
Postman: The Ecosystem Play
Postman is the incumbent for a reason. Its feature surface is the broadest of the three:
- API design and documentation: spec editing, generated docs, and mock servers in one place
- Testing and automation: a scripting sandbox with the
pmAPI, collection runners, and CI integration via Newman - Monitors and governance: scheduled runs, API governance rules, and workspace-level permissions
- Integrations: tight hooks into GitHub, GitLab, Jenkins, and most CI systems
The trade-offs are equally real. The desktop app is heavy—users routinely report it consuming well over a gigabyte of RAM with several collections open. The free tier limits collaboration to small teams, and features like monitors and advanced governance sit behind paid plans. And the cloud-first default means your request history and environment secrets live on someone else’s infrastructure unless you deliberately configure otherwise.
For teams already standardized on Postman, the switching cost is high, and the platform genuinely earns its keep in organizations that need shared documentation, scheduled monitoring, and role-based access in one tool.
Insomnia: The Polished Middle Ground
Insomnia (now owned by Kong) has long been the designer’s API client. Its interface is cleaner than Postman’s, and it handles GraphQL and gRPC more gracefully out of the box—a meaningful edge if your stack isn’t purely REST.
Strengths include:
- A fast, uncluttered UI that many developers prefer for day-to-day request building
- Strong protocol support: REST, GraphQL, gRPC, WebSocket, and SSE
- Environment and variable management that’s easier to reason about than Postman’s layered scopes
- A plugin system for extending behavior
The friction is the account requirement. When Insomnia moved to mandatory sign-in in 2023, it alienated a segment of users who wanted a purely local tool—some of whom migrated to Bruno. Insomnia’s free tier is generous for individuals, but team collaboration and some enterprise controls require a paid plan. The Kong ownership also means the product’s roadmap leans toward API gateway integration, which is either a feature or a distraction depending on your stack.
Bruno: The Git-Native Challenger
Bruno’s pitch is simple: your API collections are files, and files belong in version control.
What that looks like in practice:
- Plain-text
.bruformat that diffs cleanly in Git—no opaque JSON blobs or exported archives - Offline by default: no account, no telemetry-required login, no cloud sync unless you opt in
- A lightweight desktop app built on Electron but noticeably leaner than Postman
- A CLI (
bru) for running collections in CI, plus a growing scripting layer for tests and assertions
Bruno is younger, and it shows in places. The ecosystem of integrations is smaller, advanced collaboration features (shared workspaces, role-based permissions) are still maturing, and some enterprise buyers will find the governance story thin compared to Postman’s. But for individual developers and small teams who already live in Git, the workflow is refreshingly direct: branch, edit a request, open a PR, merge.
Side-by-Side Comparison
| Dimension | Postman | Insomnia | Bruno |
|---|---|---|---|
| Storage model | Cloud-first, sync by default | Account-based, cloud sync primary | Local files, Git-native |
| Account required | Effectively yes for full features | Yes (since 2023) | No |
| Protocol support | REST, GraphQL, gRPC, WebSocket | REST, GraphQL, gRPC, WebSocket, SSE | REST, GraphQL (gRPC support evolving) |
| Scripting/testing | Mature (pm sandbox, Newman) |
Solid, plugin-extensible | Growing (bru CLI + scripts) |
| Collaboration | Strong (workspaces, roles, docs) | Good on paid tiers | Basic, Git-based |
| Resource footprint | Heavy | Moderate | Light |
| Best fit | Large teams, full API lifecycle | Designers, GraphQL/gRPC users | Git-centric devs, privacy-focused teams |
How to Choose
The decision usually comes down to three questions.
Does your team need shared, non-technical access to collections? If product managers, QA, or external partners need to browse and run requests without touching a repo, Postman or Insomnia’s workspace model is the pragmatic choice. Bruno assumes a Git-literate audience.
Is your collection part of your code review process? If you want API tests versioned and reviewed like application code, Bruno’s file-based format removes an entire export/import ritual. Postman can approximate this with its Git integration, but the native model is different.
How much do you value local control? If mandatory accounts, cloud sync defaults, or telemetry give you pause—common concerns in regulated industries—Bruno is the clearest fit. Postman and Insomnia both offer local options, but neither is local-first.
A practical note: many developers run more than one. Postman for team-shared documentation and monitors, Bruno for personal or repo-bound collections, Insomnia for GraphQL exploration. The tools aren’t mutually exclusive, and migration between them is mostly a matter of exporting and reformatting.
The Takeaway
There’s no universal winner, and any claim otherwise ignores how differently teams work. Postman remains the most complete platform and the safest choice for organizations that need collaboration, documentation, and monitoring under one roof—at the cost of weight and cloud dependence. Insomnia offers the cleanest day-to-day experience and the best non-REST protocol support, provided you’re comfortable with an account-based model. Bruno wins on workflow philosophy: if your API collections belong in Git and your data belongs on your machine, it’s the most honest tool of the three, even if its ecosystem is still catching up.
Pick based on where your collections should live and who needs to reach them. The rest is details.