head to head · open source
Unleash vs ALTCHA
Unleash has 13,924 GitHub stars, 919 forks, 39 open issues and last shipped yesterday. ALTCHA has 2,870 stars, 143 forks, 0 open issues and last shipped 12 days ago. Unleash leads on adoption by 385% (13,924 vs 2,870 stars). Unleash is written in TypeScript under AGPL-3.0; ALTCHA is written in TypeScript under MIT. Unleash has attracted 7% as many forks as stars, ALTCHA 5%. Unleash 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
| Unleash | ALTCHA | |
|---|---|---|
| GitHub stars | ★ 14K | ★ 2.9K |
| License | AGPL-3.0 | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-02 | 2026-10-22 |
| Forks | ⑂ 919 | ⑂ 143 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Unleash if
- You weight community size — 14K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick ALTCHA if
- You want the ALTCHA feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and ALTCHA fits your workflow better
About Unleash
Launch the live demo Try Unleash Enterprise for free What is Unleash? Unleash is a powerful open source solution for feature management. It streamlines your development workflow, accelerates software delivery, and empowers teams to control how and when they roll out new features to end users. With Unleash, you can deploy code to production in smaller, more manageable releases at your own pace. Feature flags in Unleash let you test your code with real production data, reducing the risk of negatively impacting your users' experience. It also enables your team to work on multiple features simultaneously without the…
read the full Unleash overview →
About ALTCHA
ALTCHA ALTCHA is a self hosted, privacy first security solution that protects your websites, APIs, and online services from spam and abuse through an innovative proof of work mechanism. Unlike traditional CAPTCHAs that depend on intrusive methods like cookies or fingerprinting, ALTCHA delivers robust protection while respecting user privacy. ALTCHA is fully compliant with: Global privacy regulations : GDPR, HIPAA, CCPA, PIPEDA/CPPA, LGPD, DPDPA, and PIPL Accessibility standards : WCAG 2.2 AA level and the European Accessibility Act For more details, visit altcha.org. Playground Want to see it in action? Visit…
read the full ALTCHA overview →
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Frequently asked questions
Is Unleash or ALTCHA more popular?
Unleash has 13,924 GitHub stars and ALTCHA has 2,870. Unleash has the larger community by that measure.
Are Unleash and ALTCHA free?
Both are open source. Unleash is licensed under AGPL-3.0 and ALTCHA under MIT. Neither carries a licence fee.
What is the difference between Unleash and ALTCHA?
Unleash is written in TypeScript and ALTCHA 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, Unleash or ALTCHA?
Choose Unleash if you want the larger community (13,924 stars) or its AGPL-3.0 licence terms. Choose ALTCHA if its feature set, stack or MIT licence fits better. Both are self-hostable.