Postman vs Whiteboard
Postman and Whiteboard are both developer tools tools. Postman is aimed at developers and small businesses, while Whiteboard is aimed at developers and enterprise. Both have a free plan.
API platform for testing, mocking, documenting and sharing APIs
Open-source desktop canvas for reviewing coding agent work
| Pricing | Freemium · $9 | Open source |
| Starting price | $9/mo | Not published |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Built for | Developers, Small businesses, Enterprise | Developers, Enterprise, Small businesses |
| Platforms | web, macos, windows, linux | macos, windows, linux |
| Country | US · 2014 | — |
| Rating | — | — |
Choose Postman if
Development teams that want a shared, full-featured workspace for testing, mocking and documenting APIs.
- Industry standard; many API vendors ship ready Postman collections
- Testing, mocking, docs and monitoring in a single tool
- Capable Free plan for solo developers
Look elsewhere if: Developers who want a lightweight Git-native client or just a docs portal (Bruno, Insomnia, ReadMe, Scalar).
Choose Whiteboard if
Developers who let coding agents write large changes and want a visual, architecture-level way to review them.
- Free and MIT-licensed, runs against local checkouts
- Works with the coding agents teams already use
- Reviews structure and decisions, not only changed lines
Look elsewhere if: Teams that need an editor or a full review workflow with approvals and comments (GitHub, Cursor).
Postman vs Whiteboard pricing
Postman
- Free$01 user; collections, mock servers, up to 5 integrations
- Solo$9/moBilled annually; 1 user, 400 AI credits/mo
- Team$19/user/moBilled annually; unlimited users, 400 AI credits/user
- EnterpriseCustomGovernance, 800 pooled AI credits/user, 100 integrations
Whiteboard
- Open source$0MIT-licensed desktop app for macOS, Windows and Linux
Postman · Key features
- Collections with pre-request scripts, tests and environment variables
- Requests for REST, GraphQL, gRPC, WebSocket and MQTT APIs
- Mock servers that simulate endpoints before the backend exists
- Scheduled monitors for uptime and response checks
- Collection runner and Postman CLI for CI/CD pipelines
- Spec Hub and native Git sync for API definitions
Cons
- Free plan no longer allows team collaboration
- Heavy desktop app and a cloud account needed for most features
- Collections live in a proprietary format, not plain files in your repo
Whiteboard · Key features
- Agent-drawn sequence and entity relationship diagrams linked to code
- AST-aware semantic diff viewer written in Rust
- Pseudocode summaries of long functions and collapsed test changes
- Decision log of agent traces for auditing autonomous choices
- Code OSS base with VS Code keybindings and LSP support
- Automatic MCP setup for Claude Code, Codex, Cursor and OpenCode
Cons
- Beta software; files cannot be edited inside the app
- Reviews spanning several repositories are poorly supported
- Shared reviews do not update and must be re-shared
Postman vs Whiteboard: FAQ
Do Postman and Whiteboard have a free plan?
Yes, both Postman and Whiteboard have a free plan; paid plans add more usage and features.