Postman vs Insomnia vs Bruno: Best API Client for Developers in 2025
A developer’s API client used to be an afterthought—you picked whatever your team already had installed and moved on. That changed over the last two years. Postman’s cloud-first pivot, Insomnia’s account requirements, and Bruno’s sudden rise have turned a once-boring utility into a genuine decision with real trade-offs around privacy, collaboration, and pricing.
Here’s how the three leading API clients compare in 2025, and which one fits which kind of developer.
The Short Version
- Postman remains the most feature-complete platform, but it’s now a collaboration product as much as an API client.
- Insomnia offers a cleaner interface and strong protocol support, though Kong’s ownership has shifted its direction.
- Bruno is the offline-first, Git-native challenger that has won over developers who want their API collections to live in their own repos.
Postman: The Incumbent With the Most Features
Postman is still the default for a reason. It supports REST, GraphQL, gRPC, WebSocket, and SOAP, and its collection runner, mock servers, and automated test scripting are more mature than anything the competition offers. For teams that need shared workspaces, role-based access, and API documentation generated from the same collections they test with, Postman is hard to beat.
The friction is in the business model. Postman has pushed hard toward cloud sync, and the free tier now limits collaboration features that used to be available. The 2023 update that removed the Scratch Pad by default—later partially walked back after backlash—left a lasting impression that the desktop app is a funnel into the paid platform.
Pricing (2025): Free tier for individuals; Basic starts around $14 per user per month billed annually; Professional around $29; Enterprise custom.
Best for: Teams that want an all-in-one platform for testing, documentation, mocking, and monitoring, and are comfortable with cloud-hosted collections.
Watch out for: Collection sprawl. Large Postman workspaces get messy fast, and version control via Git is possible but clunky compared to file-based alternatives.
Insomnia: Polished, But in Transition
Insomnia built its reputation on a clean, fast interface and excellent support for GraphQL and gRPC alongside REST. Its environment management and request chaining are genuinely pleasant to use, and for solo developers it often feels lighter than Postman.
The complication is ownership. Kong acquired Insomnia in 2019, and in 2023 the company introduced mandatory account login and moved free users to a limited “scratch pad” model. That decision drove a wave of defections—many of them straight to Bruno. Kong has since adjusted some policies, but the trust damage lingers, and the product’s roadmap now clearly bends toward Kong’s API gateway ecosystem.
Pricing (2025): Free tier with account; Individual plan around $12 per month; Team plans around $24 per user per month; Enterprise custom.
Best for: Developers who value a clean UI and strong GraphQL/gRPC tooling and don’t mind cloud accounts.
Watch out for: Feature velocity has slowed relative to Postman, and the free tier is more restrictive than it once was.
Bruno: The Offline-First Challenger
Bruno launched with a simple, contrarian pitch: your API collections are just files, they live in your filesystem, and you version them with Git like any other code. No cloud account, no sync service, no vendor holding your requests.
That pitch landed. Bruno’s collections use a plain-text format (.bru files), which means diffs are readable, merge conflicts are manageable, and code review of API changes actually works. It’s fully offline by default, supports REST and GraphQL, and has a scripting layer for pre-request and test logic. The app is open source, with a paid tier for teams that want a shared workspace layer.
The trade-offs are real. Bruno’s ecosystem is younger: fewer integrations, less mature documentation generation, and no equivalent to Postman’s mock servers or monitoring. Its CLI (bru) is solid for CI but not as battle-tested as Newman.
Pricing (2025): Free and open source for individuals; team and enterprise plans available for hosted collaboration.
Best for: Developers and teams who want Git-native workflows, offline operation, and no vendor lock-in.
Watch out for: If you depend on Postman-specific features like mock servers or a large integration library, you’ll feel the gap.
Head-to-Head Comparison
| Feature | Postman | Insomnia | Bruno |
|---|---|---|---|
| Offline by default | Partial | No (account required) | Yes |
| Git-native collections | Clunky | Limited | Yes (core design) |
| Protocols | REST, GraphQL, gRPC, WebSocket, SOAP | REST, GraphQL, gRPC, WebSocket | REST, GraphQL |
| Open source | No | Partially | Yes |
| Free tier limits | Cloud/collab caps | Scratch pad only | Full local use |
| Mock servers | Yes | Limited | No |
| CI/CD CLI | Newman (mature) | inso CLI | bru CLI |
| Team collaboration | Best-in-class | Good | Growing |
How to Choose
Pick Postman if your team needs a shared platform with documentation, mocking, and monitoring in one place, and you’re willing to pay for it. It’s still the safest choice for large organizations with mixed technical skill levels.
Pick Insomnia if you want a polished single-developer experience with strong GraphQL support and don’t object to cloud accounts. Just go in aware that the product’s center of gravity is shifting toward Kong’s commercial ecosystem.
Pick Bruno if you believe API collections belong in your repo next to your code. For solo developers and small teams already living in Git, it removes an entire category of friction—and the offline-first design means your requests keep working when a vendor’s servers don’t.
A practical middle path: many teams now run Bruno or Insomnia for day-to-day development and keep a Postman workspace for stakeholder-facing documentation and shared test suites. Nothing requires you to pick just one.
The Takeaway
There’s no universal winner in 2025—the right choice depends on whether you’re optimizing for platform features (Postman), interface polish (Insomnia), or ownership and Git workflows (Bruno). The broader trend is clear, though: developers have grown skeptical of API clients that require accounts and cloud sync for what is fundamentally a local task. Bruno’s rise is less about beating Postman on features and more about rejecting the premise that an API client needs to be a platform at all. If your collections are your code, treat them that way—and pick the tool that lets you.