Postman vs Insomnia vs Bruno: Which API Client Is Best for Developer Teams in 2025

Three tools dominate the conversation when development teams sit down to pick an API client. Postman is the incumbent with millions of users. Insomnia is the sleek challenger that many developers switched to when Postman’s cloud-first push rubbed them the wrong way. Bruno is the newcomer that arrived in 2022 with a radical idea: keep everything in plain text files inside your Git repository.

The choice matters more than it used to. API clients are no longer just tools for firing off a quick GET request. They hold your team’s collection of endpoints, environment configs, test scripts, and documentation. Where that data lives, who can see it, and how it syncs across a team shapes your daily workflow.

Here’s how the three stack up for developer teams in 2025.

The Short Version

• Postman — the most feature-complete option, with the deepest collaboration and testing tooling. Also the heaviest, and the most tied to a proprietary cloud.
• Insomnia — a cleaner, faster client with strong support for GraphQL and gRPC. Owned by Kong since 2019, with a growing enterprise focus.
• Bruno — offline-first, Git-native, and free at its core. Fewer bells and whistles, but nothing about your API collections lives on someone else’s server unless you want it to.

Postman: The Everything Platform

Postman started in 2012 as a Chrome extension and grew into something closer to a platform than a client. It now covers API design, mocking, automated testing, documentation, and monitoring, with a cloud workspace that keeps everything synced across a team.

Where it wins:

• Collaboration depth. Shared workspaces, role-based permissions, comments, and change history make it easy for a team of ten to work on the same collection without stepping on each other.
• Testing and automation. The Collection Runner, Newman (the CLI runner), and Postman Flows let you build real test pipelines. If your team runs API tests in CI, Postman has the most mature path.
• Ecosystem and hiring. Nearly every API tutorial online uses Postman. New hires usually already know it, which cuts onboarding time.
• Protocol coverage. REST, GraphQL, gRPC, WebSocket, and MQTT are all supported.

Where it hurts:

• Heavy footprint. The desktop app is Electron-based and resource-hungry. Startup times and memory use are common complaints.
• Cloud-first design. Collections sync to Postman’s servers by default. You can work locally, but the product is clearly built around the cloud workspace.
• Pricing pressure. The free tier is usable for individuals. Team plans have crept upward, and in 2023 Postman’s attempt to retire the Scratch Pad (a local, no-account workspace) triggered enough backlash that the company reversed course. That episode is still cited by teams evaluating alternatives.
• Proprietary format. Collections are stored in Postman’s own JSON schema, which makes them awkward to diff and review in a pull request.

Best for: Larger teams that want one tool for the whole API lifecycle and are comfortable with a hosted platform.

Insomnia: The Focused Client

Insomnia began in 2016 as a lean alternative to Postman, and Kong acquired it in 2019. It kept the clean interface that made it popular while adding enterprise features under Kong’s umbrella.

Where it wins:

• Speed and interface. Insomnia feels lighter and gets out of your way. The request builder is clean, and the keyboard-driven workflow appeals to developers who live in the terminal.
• GraphQL and gRPC. Insomnia’s GraphQL support, including schema introspection and autocomplete, is arguably the best of the three. gRPC support is solid too.
• Design-first workflow. The OpenAPI editor and the ability to generate requests from a spec make it a good fit for teams that treat the spec as the source of truth.
• Plugin ecosystem. A range of community plugins extends functionality without bloating the core app.

Where it hurts:

• Sync and account requirements. Insomnia’s cloud sync and collaboration features require an account, and some features have shifted behind paid tiers over time. The free tier is generous but not unlimited.
• Collaboration is thinner than Postman’s. Shared projects exist, but the review, comment, and permission tooling is less developed.
• Kong’s direction. Since the acquisition, Insomnia has increasingly been positioned alongside Kong’s API gateway products. Some long-time users worry about where the standalone client fits in that strategy.
• Storage format. Like Postman, Insomnia uses its own format, so Git-based review isn’t native.

Best for: Individual developers and small teams who want a fast, focused client, especially those working heavily with GraphQL or gRPC.

Bruno: The Git-Native Challenger

Bruno launched in 2022 with a single strong opinion: your API collections are code, and they belong in your repository. Instead of a proprietary cloud format, Bruno stores each request as a plain .bru text file on your filesystem.

Where it wins:

• Git-native by design. Every request is a readable text file. You can diff it, review it in a pull request, branch it, and merge it like any other source file. For teams that already live in Git, this removes an entire category of friction.
• Offline-first, no account needed. Bruno works entirely locally. Nothing syncs anywhere unless you set up your own sync. For teams with data residency requirements or strict security policies, that’s a major advantage.
• Lightweight. The app is fast to launch and light on memory compared to Postman.
• Open source and free core. Bruno’s core is open source, and the free tier covers most individual and small-team needs without an account. Paid plans exist for teams that want hosted collaboration.
• Familiar scripting. Pre-request and post-response scripts run on JavaScript, so the learning curve is shallow for anyone coming from Postman.

Where it hurts:

• Younger ecosystem. Bruno doesn’t have Postman’s depth in mocking, monitoring, or automated test pipelines. CI integration is possible through its CLI, but it’s less mature.
• Smaller community. Fewer plugins, fewer tutorials, and fewer Stack Overflow answers when something goes wrong.
• Collaboration model is DIY. If you want shared environments or hosted sync, you either pay for Bruno’s team features or build the workflow yourself on top of Git.

Best for: Teams that treat API collections as code, care about data ownership, and are willing to trade some polish for control.

Side-by-Side Comparison

	Postman	Insomnia	Bruno
Storage	Proprietary JSON, cloud-synced	Proprietary, cloud-synced	Plain-text .bru files
Git-friendly	Limited	Limited	Native
Free tier	Generous, account required for sync	Generous, account required for sync	Full-featured, no account
Collaboration	Deepest	Moderate	Git-based or paid tier
GraphQL / gRPC	Good	Excellent	Good
Testing & CI	Most mature (Newman, Flows)	Moderate	Basic CLI
Resource use	Heavy	Moderate	Light
Open source	No	No	Core yes

How to Choose

The decision usually comes down to three questions.

Does your team need deep collaboration and testing? If you’re running automated API tests in CI and want comments, permissions, and change history out of the box, Postman is still the safest bet. Its maturity is real.

Do you work heavily with GraphQL or gRPC? Insomnia’s tooling in those areas is excellent, and its lighter footprint is a genuine daily quality-of-life improvement.

Do you want your API collections to live in Git? If your team already reviews code in pull requests and cares about where your data sits, Bruno’s model is hard to beat. The tradeoff is a smaller ecosystem and less out-of-the-box automation.

A practical pattern some teams land on: use Bruno or Insomnia for day-to-day local development, and keep Postman around for the parts of the API lifecycle it handles best, like shared documentation or scheduled monitoring. The tools aren’t mutually exclusive.

The Takeaway

There’s no single winner in 2025. Postman remains the most capable platform and the easiest default for large teams that want everything in one place. Insomnia is the better fit for developers who value speed and strong GraphQL or gRPC support. Bruno wins on data ownership and Git-native workflows, at the cost of ecosystem depth.

Pick based on where you want your API collections to live and how much collaboration tooling you actually need. That question answers the tool choice more reliably than any feature checklist.