head to head · open source
Tailcall vs dev-proxy
Tailcall has 7,637 GitHub stars, 1,456 forks, 45 open issues and last shipped 2 days ago. dev-proxy has 838 stars, 90 forks, 36 open issues and last shipped yesterday. Tailcall leads on adoption by 811% (7,637 vs 838 stars). Tailcall is written in Rust under Apache-2.0; dev-proxy is written in C# under MIT. Tailcall has attracted 19% as many forks as stars, dev-proxy 11%. dev-proxy was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (llm), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Tailcall | dev-proxy | |
|---|---|---|
| GitHub stars | ★ 7.6K | ★ 838 |
| License | Apache-2.0 | MIT |
| Written in | Rust | C# |
| Last push | 2026-11-01 | 2026-11-02 |
| Forks | ⑂ 1.5K | ⑂ 90 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Tailcall if
- You weight community size — 7.6K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick dev-proxy if
- You want the dev-proxy feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and dev-proxy fits your workflow better
About Tailcall
⚒️ Forge: AI Enhanced Terminal Development Environment A comprehensive coding agent that integrates AI capabilities with your development environment curl fsSL sh Table of Contents Quickstart Usage Examples Why Forge? How Forge Works: Three Modes Interactive Mode (TUI) One Shot CLI Mode ZSH Plugin Mode ( : prefix) ZSH Plugin: The : Prefix System Agents Sending Prompts Attaching Files Conversation Management Git Integration Shell Command Tools Session & Configuration Skills Customizing Agent Behavior Semantic Search (Workspace) Quick Reference: All : Commands Command Line Options Advanced Configuration Provider…
read the full Tailcall overview →
About dev-proxy
Dev Proxy Test the untestable Documentation What is Dev Proxy? Dev Proxy is an API simulator that helps you effortlessly test your app beyond the happy path. Dev Proxy is a command line tool that works on any platform. Because it intercepts network requests, it works with any type of app and tech stack. Dev Proxy is open source and free to use . You test your app to make sure it works as intended. But what if the APIs you use fail? Will your app lose your customer's data? How do you test for this? Simulating API failures is hard. You end up writing code that you won't be shipping or worse: not testing at all…
read the full dev-proxy overview →
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Frequently asked questions
Is Tailcall or dev-proxy more popular?
Tailcall has 7,637 GitHub stars and dev-proxy has 838. Tailcall has the larger community by that measure.
Are Tailcall and dev-proxy free?
Both are open source. Tailcall is licensed under Apache-2.0 and dev-proxy under MIT. Neither carries a licence fee.
What is the difference between Tailcall and dev-proxy?
Tailcall is written in Rust and dev-proxy in C#. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Tailcall or dev-proxy?
Choose Tailcall if you want the larger community (7,637 stars) or its Apache-2.0 licence terms. Choose dev-proxy if its feature set, stack or MIT licence fits better. Both are self-hostable.