Open-source alternatives to Leonardo.AI
Looking to replace Leonardo.AI with something free and open-source? These 3 tools are the best open alternatives in 2026 — most are self-hostable, so you keep full control of your data and pay no subscription.
At a glance: how they compare
| Alternative | License | Self-hostable | In one line |
|---|---|---|---|
| aidea | MIT | ✓ Yes | An APP that integrates mainstream large language models and image generation models, built with Flutter, with fully open-source code. |
| ODS | Apache-2.0 | ✓ Yes | Turn your PC, Mac, or Linux box into an AI server. LLM inference, chat UI, voice, agents, workflows, RAG, and image generation. |
| AI-Horde | AGPL-3.0 | ✓ Yes | A crowdsourced distributed cluster for AI art and text generation |
Which one should you pick?
aidea
An APP that integrates mainstream large language models and image generation models, built with Flutter, with fully open-source code. Its MIT license is permissive — free to use commercially, embed and modify. Because it is self-hostable, your data can stay entirely on your own infrastructure.
ODS
Turn your PC, Mac, or Linux box into an AI server. LLM inference, chat UI, voice, agents, workflows, RAG, and image generation. Its Apache-2.0 license is permissive — free to use commercially, embed and modify. Because it is self-hostable, your data can stay entirely on your own infrastructure.
AI-Horde
A crowdsourced distributed cluster for AI art and text generation Its AGPL-3.0 license keeps the project and its forks open-source forever, and commercial use is allowed. Because it is self-hostable, your data can stay entirely on your own infrastructure.
Switching from Leonardo.AI without the drama
- Export your data from Leonardo.AI first — most tools above can import standard formats.
- Run your top pick in parallel for a week or two before committing; self-hosted options can be tried locally in minutes.
- Migrate one team or one project at a time, keeping the old account read-only until everything checks out.
FAQ
What is the best open-source alternative to Leonardo.AI?
The top open-source alternative is aidea — An APP that integrates mainstream large language models and image generation models, built with Flutter, with fully open-source code. The full ranked list is above.
Are these Leonardo.AI alternatives free?
Yes. Every tool listed is open-source and free to use; most can be self-hosted so you keep full control of your data.
Can I self-host an alternative to Leonardo.AI?
Most of these tools are designed to run on your own server or machine, giving you privacy and no subscription fees.
More open-source alternatives
Browse open-source replacements for dozens of popular tools — design, productivity, dev, analytics and more.
See all alternatives →