Best free Gamma alternatives (open source, 2026)
Updated · 20 repos compared · data refreshed nightly from GitHub
The best free Gamma alternative for most people is presenton (11k GitHub stars, Apache-2.0 license). presentation-ai describes itself as a Gamma alternative; REINVENT4 works on a Mac according to its README. All 20 options below are open source and run on your own computer or server, so there's no subscription.
Gamma (AI slide decks and presentations) is a paid, closed-source product. The open-source projects below do the same job and run on your own computer or server. Stars and activity come straight from GitHub.
Top picks
Open-Source AI Presentation Generator and API (Gamma, Canva, Beautiful AI, Decktopus, Presentations AI Alternative)
- Needs:
- Hardware not stated in its README
- Trade-off
- Better than Gamma: the biggest community (11k stars), a permissive Apache-2.0 license. Worse: you install and run it yourself instead of Gamma's hosted app.
ALLWEONE® Open source AI presentation generator Gamma Alternative. Create professional slides with customizable themes and AI-generated content in minutes.
- Needs:
- Hardware not stated in its README
- Trade-off
- Better than Gamma: a permissive MIT license. Worse: you install and run it yourself instead of Gamma's hosted app.
AI molecular design tool for de novo design, scaffold hopping, R-group replacement, linker design and molecule optimization.
- Needs:
- works on Mac (per README)
- Trade-off
- Better than Gamma: a permissive Apache-2.0 license, very active development. Worse: a small community, so fewer guides and fixes.
Comparison
✓ yes · ✗ no · – not stated in the README. Hardware details are read from each README and may be incomplete.
Gamma vs open source: what you give up
- Setup. Gamma is ready as soon as you sign up. These projects need installing, usually with Python, Node or Docker.
- Hardware. Most READMEs don't state hardware needs; heavier models run much faster with a GPU. 6 mention Mac support.
- Polish and support. Paid products usually have a smoother interface, managed updates and customer support. Open source gives you privacy, no usage limits and no monthly bill.
- Maintenance. 9 of 20 were updated in the last 30 days.
- License. 15 of 20 use a standard open-source license (MIT, Apache, GPL and similar). Check the license before commercial use.
How we picked
Projects that describe themselves as a Gamma alternative come first, then projects that do the same job, ranked by how well they match and by GitHub stars. Projects that need a paid API key, and projects from Gamma's own company, are left out. Stars and activity are verified with the GitHub API every night; hardware details come from each README. Full method.
FAQ
Is there a free alternative to Gamma?
Yes. We list 20 free, open-source GitHub projects that do the same job as Gamma. The most popular are presenton, modly and presentation-ai.
What is the best open-source Gamma alternative?
It depends on your setup. Best overall: presenton. Closest Gamma replacement: presentation-ai. Mac users: REINVENT4. Compare GitHub stars, license and hardware needs in the table on this page.
Can I run a Gamma alternative on a Mac?
Yes. According to their READMEs, REINVENT4, OpenLoaf and PaperForge run on macOS.
Do I need a GPU to replace Gamma?
Most READMEs don't state hardware needs. Expect heavier models to run much faster with a GPU.
Are these Gamma alternatives really free?
Yes. All 20 are open source on GitHub, and projects that need a paid API key are left out. 15 use a standard open-source license such as MIT, Apache or GPL; check the license before commercial use.