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Bruno vs FieldFlow
Short answer: Pick Bruno if you want Git-native API client; pick FieldFlow if you want selective field fetching for LLM agents. Bruno has a free plan; FieldFlow is free.
BrunoOffline-first, Git-friendly open-source API client
FieldFlowTurn your REST API into an optimized MCP ServerWhich to pick
Pick Bruno if you want…
- Git-native API client
- Integrations with Vault or Azure Key Vault (on Bruno's list, not FieldFlow's)
Pick FieldFlow if you want…
- Selective field fetching for LLM agents
- Integrations with FastAPI, httpx or Pydantic (on FieldFlow's list, not Bruno's)
Side by side
- What it is
- Bruno:Bruno is an open-source, offline-first API client that stores collections as plain-text files in Git.
- FieldFlow:FieldFlow converts any OpenAPI-described REST API into a filtered MCP server with FastAPI routes.
- Best for
- Bruno:Git-native API client
- FieldFlow:Selective field fetching for LLM agents
- Who it’s for
- Bruno:Developers and teams who need a secure, local-first API testing tool.
- FieldFlow:Developers building LLM agents or apps that need field-level API responses.
- Pricing
- Bruno:Freemium
- FieldFlow:Free
- Free plan or trial
- Bruno:Free plan (Open Source) · Free trial
- FieldFlow:—
- Plans
- Bruno:Open Source $0 · Pro $6user/month per month, billed annually · Ultimate $11user/month per month, billed annually
- FieldFlow:—
- Open source
- Bruno:Yes, 47,301 GitHub stars
- FieldFlow:Yes, 111 GitHub stars
- Works with
- Bruno:Vault, Azure Key Vault
- FieldFlow:FastAPI, httpx, Pydantic, OpenAPI 3.x, Model Context Protocol, Claude Desktop
Bruno features
- Git-native collections. Store API requests as YAML files in your repo, enabling diff, branch, and merge workflows.
- No cloud sync. All data stays on the local machine; no account or login required.
- Multi-protocol support. Send HTTP, REST, GraphQL, gRPC and WebSocket requests.
- Secret manager integration. Connect to Vault, Azure Key Vault and AWS Secrets Manager for credentials.
- Built-in terminal & scripting. Run JavaScript scripts and use an integrated terminal for automation.
- Workspace & collection runner. Organize requests in workspaces and run entire folders of requests at once.
FieldFlow features
- OpenAPI native. Point FieldFlow at an OpenAPI 3.x spec and it auto-discovers endpoints and schemas.
- Typed Pydantic models. Generates request/response models with full validation, aliases and nested refs.
- Selective responses. Each route accepts a fields list so callers receive only the data they request.
- FastAPI gateway. Proxies calls via httpx and serves filtered results through FastAPI routes.
- Spec-first fidelity. Handles recursive schema resolution to stay aligned with the upstream API.
- Optional MCP layer. Exposes the same filtered endpoints to Model Context Protocol clients like Claude Desktop.
Bruno vs FieldFlow FAQ
What is the difference between Bruno and FieldFlow?+
Bruno is an offline-first API client focused on request management, not on automatic field filtering.
Should I use Bruno or FieldFlow?+
Pick Bruno if you want Git-native API client or integrations with Vault or Azure Key Vault (on Bruno's list, not FieldFlow's). Pick FieldFlow if you want selective field fetching for LLM agents or integrations with FastAPI, httpx or Pydantic (on FieldFlow's list, not Bruno's).
Is Bruno or FieldFlow free?+
Bruno has a free plan (Open Source) and paid plans. FieldFlow is listed as free on DevHunt.
Is Bruno or FieldFlow open source?+
Yes, both are open source: Bruno (usebruno/bruno on GitHub, MIT license) and FieldFlow (guillaumegay13/fieldflow on GitHub, MIT license).
Do Bruno and FieldFlow integrate with the same tools?+
Their integration lists don't overlap: Bruno lists Vault and Azure Key Vault; FieldFlow lists FastAPI, httpx, Pydantic, OpenAPI 3.x and 2 more.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.