Postman vs Insomnia vs Bruno: Best API Testing Tool for Developers Compared

A 2024 JetBrains developer survey found that roughly 70% of backend developers test APIs manually at least some of the time, and most of them reach for a dedicated client rather than curl. Three names dominate that conversation right now: Postman, Insomnia, and Bruno.

The three tools solve the same core problem—sending HTTP requests, inspecting responses, and organizing that work into reusable collections—but they take very different approaches to storage, collaboration, and pricing. Here’s how they actually compare.

The Short Version

• Postman is the most feature-complete option, with the largest ecosystem, but it’s cloud-first and increasingly pushes teams toward paid plans.
• Insomnia offers a polished UI and strong GraphQL support, but its 2023 account requirements and pricing changes frustrated many long-time users.
• Bruno is a newer, open-source, offline-first tool that stores collections as plain files on your filesystem—no cloud sync required.

Postman: The Incumbent

Postman started in 2012 as a Chrome extension and grew into a full API platform. It’s now used by more than 30 million developers according to the company, and it’s the default choice at many enterprises.

Strengths:

• Breadth of features. Collections, environments, mock servers, automated tests, monitors, and documentation generation all live in one app.
• Scripting. Pre-request and test scripts run in a sandboxed JavaScript environment, so you can chain requests, extract tokens, and assert on response bodies.
• Ecosystem. The public API Network has tens of thousands of shared collections, and integrations cover CI tools, Git providers, and API gateways.
• Team collaboration. Workspaces, roles, and comments make it easy for a team to share a single source of truth.

Weaknesses:

• Cloud-first storage. By default, collections live in Postman’s cloud. Local-only workflows exist, but they’re not the primary path.
• Pricing pressure. The free tier is generous for individuals, but team features like shared workspaces with role controls and higher monitor limits sit behind paid plans. Basic was $14/user/month and Professional $29/user/month at the time of writing, billed annually.
• Resource usage. The desktop app is Electron-based and can feel heavy on older machines.
• Account requirement. You need to sign in to use most functionality, which is a non-starter in some air-gapped or security-sensitive environments.

Postman is the right call if you want one tool that does everything and you’re comfortable with cloud sync.

Insomnia: The Designer’s API Client

Insomnia, now owned by Kong, built its reputation on a clean interface and excellent GraphQL support. It hit version 8 in 2023 and remains a popular alternative for developers who find Postman cluttered.

Strengths:

• Interface. The UI is arguably the cleanest of the three, with a focus on the request/response cycle rather than dashboards and workspaces.
• GraphQL and gRPC. First-class support for both, including schema introspection and query autocomplete.
• Plugin system. A Node.js-based plugin API lets you extend authentication, templating, and response handling.
• Design documents. You can define an API spec and generate requests from it, which suits spec-first teams.

Weaknesses:

• The 2023 changes. Insomnia 8 required users to create an account and introduced a new pricing model. The community reaction was loud enough that Kong later walked back some restrictions, but trust took a hit.
• Storage model. Collections sync to Insomnia’s cloud by default. Local storage and Git sync exist but are less central than in Bruno.
• Pricing. The free tier covers individual use; team plans start around $12/user/month for the Essentials tier, with higher tiers for enterprise features.

Insomnia is a solid middle ground—more polished than Bruno, less sprawling than Postman—but the account requirement and past pricing drama are worth weighing.

Bruno: The Offline-First Challenger

Bruno launched in 2023 as a direct response to the cloud-first trend. Its pitch is simple: your collections are plain .bru files stored in a folder you choose, and you can commit them to Git like any other code.

Strengths:

• Local-first storage. No account, no cloud, no sync service. Collections live on disk in a human-readable format.
• Git-native. Because collections are files, code review, branching, and merging work the way they do for source code. This is a genuine differentiator for teams that already review everything in pull requests.
• Open source. Bruno is licensed under MIT, with an active community contributing to the core and to plugins.
• Lightweight. The app is fast to launch and doesn’t require a login.
• Pricing. The core app is free. A paid “Golden Edition” adds features like team collaboration tooling, but you can use Bruno indefinitely without paying.

Weaknesses:

• Smaller ecosystem. Fewer integrations, fewer shared collections, and less documentation than Postman.
• Fewer advanced features. Mock servers, monitors, and API documentation generation are limited or absent compared to Postman.
• Younger project. Bruno is a few years old, so edge cases and platform quirks still surface more often than in mature tools.

Bruno is the best fit for developers who treat API collections as code and want to keep them under version control without a vendor in the middle.

Head-to-Head Comparison

Feature	Postman	Insomnia	Bruno
Storage	Cloud by default	Cloud by default	Local files
Git-friendly	Partial	Partial	Native
Open source	No	Partially	Yes (MIT)
Free tier	Generous	Generous	Full core app
Paid plans	~$14–29/user/mo	~$12+/user/mo	Optional
GraphQL	Good	Excellent	Good
gRPC	Good	Good	Basic
Account required	Yes	Yes	No
Scripting	JavaScript	JavaScript	JavaScript

Which Should You Pick?

The honest answer depends on what you value most.

Choose Postman if you need the widest feature set, enterprise-grade collaboration, and don’t mind cloud storage or paying for team seats. It’s the safest default for large organizations.

Choose Insomnia if you want a cleaner UI, strong GraphQL support, and a middle ground between Postman’s sprawl and Bruno’s minimalism. Just go in aware of the account requirement.

Choose Bruno if you want your API collections versioned alongside your code, you work in a security-sensitive or offline environment, or you simply don’t want another SaaS subscription.

Many developers end up using more than one. Postman for exploratory work and shared team collections, Bruno for the collections that live in a repo. There’s no rule that says you have to pick a single winner.

The Takeaway

Postman, Insomnia, and Bruno are converging on similar feature sets, but they diverge sharply on where your data lives. Postman bets on the cloud, Insomnia splits the difference, and Bruno bets on your filesystem and your Git history. If your team already reviews code in pull requests, Bruno’s model will feel natural. If you need monitors, mocks, and a public collection library, Postman still leads. Insomnia remains a reasonable compromise—provided the account requirement doesn’t conflict with how your team works.

Pick based on your storage and collaboration constraints first, features second. That’s the decision that’s hardest to reverse later.