Replace / Gamma
Best free Gamma alternatives (open source, self-hosted) 2026
The best open-source alternative to Gamma is Slidev (or reveal.js) with Marp, self-hosted on Railway. A deck you build. Slidev is MIT; reveal.js is MIT — Pitch or Gamma without the hosted slide seat.
Estimated save $1,200 a year.
Open the stackStart on Railway
How Gamma compares
| Gamma | Slidev / reveal.js | |
|---|---|---|
| Pricing model | Hosted subscription | Open-source or fair-code license; you pay the host |
| Hosting | Vendor cloud | Self-hosted on Railway or any VPS |
| Rough monthly cost | Public list price not verified this run | Hosting only — no SaaS seat meter in this repo |
- Slidev
MIT Markdown decks — the published Pitch / Gamma path
- reveal.js
MIT HTML presentation framework
- Marp
MIT Markdown presentation ecosystem
FAQ
- What is the best free open-source Gamma alternative?
- The best open-source alternative to Gamma is Slidev (or reveal.js) with Marp, self-hosted on Railway. A deck you build. Slidev is MIT; reveal.js is MIT — Pitch or Gamma without the hosted slide seat.
- Is it free?
- The Slidev / reveal.js licenses are open source or fair-code. You still pay hosting (Railway or any VPS) and any APIs the stack calls. There is no Gamma seat or task bill on this path.
- Can I migrate from Gamma?
- Yes. Start with the workflows or data you actually use, then cut over. The Slidev / reveal.js stack page has the agent prompt and the cost table; most teams rebuild the slice that matters and leave old Gamma links until they expire.
- How do I deploy it?
- Open the Slidev / reveal.js stack, copy the agent prompt, and deploy on Railway (one service, PORT, and a volume when the app needs disk). Placeholder: a Slidev or reveal.js static build served by Caddy (or any static host). Bind HTTP to 0.0.0.0:$PORT. No one-click template in this repo yet — Start on Railway. A .pptx stays on /stacks/onlyoffice-collabora.
- What does this replace?
- Pitch / Gamma. The published small-team estimate on this stack is $1,200 a year.
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