Postman vs Insomnia vs Bruno: Choosing an API Client
Basics4 minInnovialabs editorial team
In short
Postman is the richest cloud platform for mixed teams with QA and managers, Bruno is an offline client that stores collections as files right in your Git repo, and Insomnia sits in between with a choice of local, cloud or Git storage.
The short answer
- Postman — a full API platform: requests, tests, documentation, mocks, monitoring. Everything syncs through the Postman cloud and requires an account. The best fit when people other than developers work with the API.
- Insomnia (by Kong) — a clean client with REST, GraphQL, gRPC and WebSocket support. It lets you choose where data lives: local only, cloud or Git.
- Bruno — an open-source offline client with no cloud. Collections are plain text files in your project folder, and collaboration happens through Git.
Side-by-side comparison
| Criterion | Postman | Insomnia | Bruno |
|---|---|---|---|
| Where collections live | Postman cloud | Local, cloud or Git — your choice | Files on disk, usually in Git |
| Works without internet or account | Limited | Has a local mode | Yes, that is the default |
| Collaboration | Shared workspaces, comments, roles | Cloud sync or Git | Via Git: branches and pull requests |
| Docs and mocks | Built in and mature | OpenAPI design, mocks | Minimal |
| Automated tests and CLI | Scripts, Newman, Postman CLI | Scripts, Inso CLI | Scripts, Bruno CLI |
| Open source | No | Core is open | Yes |
| Ease for non-developers | Easiest | Medium | Requires Git knowledge |
All three evolve quickly, so check the current list of protocols and features on the official sites before you commit.
Offline use and Git storage
This is where the philosophies differ most.
- Bruno saves each request as a separate text file. The collection sits in the repository next to the API code, changes show up in diffs, get reviewed with the code and never leave your infrastructure.
- Insomnia gives a choice: a local vault with no cloud, cloud sync, or Git Sync. Useful when part of the team wants the cloud and part does not.
- Postman is cloud-first. You can export collections to JSON and keep them in Git, but that is an extra step rather than the main workflow.
Collaboration
- Postman shines when QA, analysts, managers or external partners work with the API: shared workspaces, instant updates for everyone, comments, permissions and published documentation.
- Bruno suits teams that already live in Git: collection changes ride in the same pull request as the API changes.
- Insomnia handles both scenarios, though it is not the strongest at either.
Pricing: what drives the cost
Specific prices change, so understand the model instead:
- Postman — a free plan with limits on collaboration and cloud features; paid plans are per user, so cost grows with the team.
- Insomnia — free for basic use; team features and cloud sync sit in paid plans.
- Bruno — the core client is free and open source; some advanced features are in a paid edition.
When estimating, consider how many people truly need access, whether you need SSO, roles and audit logs, and how many runs, mocks and monitors you will use.
Privacy and security
For an API client the question is where tokens, keys and sample responses with real data end up.
- If collections sync to a cloud, they are stored on the vendor's servers. Confirm that this is acceptable under your company policy and data storage requirements.
- Bruno and Insomnia's local mode do not send collections to a cloud.
- In any tool, keep secrets in environment variables or a dedicated secrets store, not in request bodies.
What to pick by team size
| Situation | Recommendation |
|---|---|
| Solo developer or freelancer | Any; Bruno if you want requests in the repo |
| Small developer team, everything in Git | Bruno |
| Mixed team: developers, QA, managers, partners | Postman |
| Strict data rules, cloud not allowed | Bruno or Insomnia in local mode |
| Heavy gRPC use, OpenAPI design-first, Kong infrastructure | Insomnia |
| Large company needing SSO and roles | Postman on an enterprise plan, or Bruno with your own Git server, depending on security requirements |
Common mistakes
- Picking whatever one person is used to without asking who else will use the collections.
- Keeping production tokens in synced collections.
- Maintaining two copies of a collection in different tools — they drift apart fast.
FAQ
Yes. Both import Postman collections. The part to check after migrating is usually scripts, since syntax and available functions differ between clients.