Side by side
grpcui vs Posting
Both stand on api clients. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxMacSelf-hosted+2
grpcui offers a browser-based way to build and inspect gRPC requests, including support for several schema sources and transport options. Its all-at-once streaming constraint matters for developers working with bidirectional streams.
Visit grpcui Free plan LinuxMacWindows
Posting offers a scriptable, keyboard-focused API client with local, versionable request files. Missing WebSockets and automated test runs limit its coverage for some testing workflows.
Visit PostingThe facts
| grpcui | Posting | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Linux, Mac, Self-hosted, Web, Windows | Linux, Mac, Windows |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 1 |
| Maker | Not published | Not published |
| Website | github.com | posting.sh |
| On api clients | #24 of 38 | #28 of 38 |
grpcui: what it does well
- Free and released under the MIT license
- Discovers schemas through reflection or proto files
- Supports mutual TLS with client certificates
- Displays response headers, messages, errors, and trailers
- Provides Go packages for embedding its UI
What to know first
- Bidirectional streams cannot be handled interactively
- Streaming requests must be constructed all at once
- Designed for gRPC APIs, not REST APIs
Posting: what it does well
- Free and open source
- Runs on three desktop platforms
- Readable YAML request storage
- Python request scripting
- SSH and container use
What to know first
- No WebSocket support
- No automated test runs
- Homebrew installation unsupported
- Editing headers requires recreation
Alternatives to grpcui Alternatives to Posting The whole list