head to head · open source
effect vs future-agi
effect has 16,138 GitHub stars, 752 forks, 253 open issues and last shipped today. future-agi has 2,041 stars, 631 forks, 889 open issues and last shipped 2 days ago. effect leads on adoption by 691% (16,138 vs 2,041 stars). effect is written in TypeScript under MIT; future-agi is written in Python under Apache-2.0. effect has attracted 5% as many forks as stars, future-agi 31%. effect was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| effect | future-agi | |
|---|---|---|
| GitHub stars | ★ 16K | ★ 2.0K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | Python |
| Last push | 2026-09-20 | 2026-09-18 |
| Forks | ⑂ 752 | ⑂ 631 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick effect if
- You weight community size — 16K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick future-agi if
- You want the future-agi feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and future-agi fits your workflow better
About effect
Effect is a TypeScript library for building robust, maintainable, type safe, and production grade applications. It lives in the TypeScript and JavaScript ecosystem, distributed as the core effect package alongside a monorepo of integration packages that extend it. The project is MIT licensed, has been developed for roughly seven years, and currently ships Effect V4 as a release candidate, with the main branch holding v4 development and the v3 branch retaining the previous line.
read the full effect overview →
About future-agi
Future AGI is an open source platform for evaluating, observing, and improving large language model and AI agent applications. It lives in the LLM operations ecosystem, where teams need tracing, evaluations, simulations, datasets, gateway routing, guardrails, and optimization in one Apache 2.0 project.
read the full future-agi overview →
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Frequently asked questions
Is effect or future-agi more popular?
effect has 16,138 GitHub stars and future-agi has 2,041. effect has the larger community by that measure.
Are effect and future-agi free?
Both are open source. effect is licensed under MIT and future-agi under Apache-2.0. Neither carries a licence fee.
What is the difference between effect and future-agi?
effect is written in TypeScript and future-agi in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, effect or future-agi?
Choose effect if you want the larger community (16,138 stars) or its MIT licence terms. Choose future-agi if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.