head to head · open source
Tailcall vs aimock
Tailcall has 7,633 GitHub stars, 1,456 forks, 45 open issues and last shipped 2 days ago. aimock has 1,003 stars, 82 forks, 1 open issues and last shipped yesterday. Tailcall leads on adoption by 661% (7,633 vs 1,003 stars). Tailcall is written in Rust under Apache-2.0; aimock is written in TypeScript under MIT. Tailcall has attracted 19% as many forks as stars, aimock 8%. aimock 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 | aimock | |
|---|---|---|
| GitHub stars | ★ 7.6K | ★ 1.0K |
| License | Apache-2.0 | MIT |
| Written in | Rust | TypeScript |
| Last push | 2026-11-03 | 2026-11-04 |
| Forks | ⑂ 1.5K | ⑂ 82 |
| 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 aimock if
- You want the aimock feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and aimock 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 aimock
aimock Mock infrastructure for AI application testing — point your SDK at one local port and every provider, protocol, and service answers deterministically. Quick start · The suite · Record & replay · Docs One package, one port, zero dependencies. LLM APIs, image generation and editing, text to speech, transcription, audio translation and generation, video generation, embeddings, MCP tools, A2A agents, AG UI event streams, vector databases, search, rerank, and moderation — no keys, no network, no surprise bills. Quick Start The aimock Suite aimock mocks everything your AI app talks to: Run them all on one port…
read the full aimock overview →
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Frequently asked questions
Is Tailcall or aimock more popular?
Tailcall has 7,633 GitHub stars and aimock has 1,003. Tailcall has the larger community by that measure.
Are Tailcall and aimock free?
Both are open source. Tailcall is licensed under Apache-2.0 and aimock under MIT. Neither carries a licence fee.
What is the difference between Tailcall and aimock?
Tailcall is written in Rust and aimock in TypeScript. 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 aimock?
Choose Tailcall if you want the larger community (7,633 stars) or its Apache-2.0 licence terms. Choose aimock if its feature set, stack or MIT licence fits better. Both are self-hostable.