head to head · open source
Ollama vs llama_index
Ollama has 181,161 GitHub stars, 17,917 forks, 3,957 open issues and last shipped yesterday. llama_index has 52,202 stars, 8,162 forks, 770 open issues and last shipped yesterday. Ollama leads on adoption by 247% (181,161 vs 52,202 stars). Ollama is written in Go under MIT; llama_index is written in Python under MIT. Ollama has attracted 10% as many forks as stars, llama_index 16%. llama_index was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (llm), so they are genuine substitutes rather than adjacent tools.
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
| Ollama | llama_index | |
|---|---|---|
| GitHub stars | ★ 181K | ★ 52K |
| License | MIT | MIT |
| Written in | Go | Python |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 18K | ⑂ 8.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Ollama if
- You weight community size — 181K stars and counting
- You want the MIT license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick llama_index if
- You want the llama_index feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and llama_index fits your workflow better
About Ollama
Ollama is a Go based, MIT licensed runtime that downloads and runs open source large language models such as DeepSeek, Qwen, Gemma, GLM, MiniMax and gpt oss locally on a user's own machine, and it is aimed at developers and teams that want model inference without routing prompts through a hosted API.
read the full Ollama overview →
About llama_index
LlamaIndex is an MIT licensed, open source Python framework for building agentic applications — retrieval augmented generation systems, agents and multi agent workflows — on top of private documents and data, and it is aimed at AI engineers and teams who need to connect large language models to their own sources of context.
read the full llama_index overview →
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Frequently asked questions
Is Ollama or llama_index more popular?
Ollama has 181,161 GitHub stars and llama_index has 52,202. Ollama has the larger community by that measure.
Are Ollama and llama_index free?
Both are open source. Ollama is licensed under MIT and llama_index under MIT. Neither carries a licence fee.
What is the difference between Ollama and llama_index?
Ollama is written in Go and llama_index 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, Ollama or llama_index?
Choose Ollama if you want the larger community (181,161 stars) or its MIT licence terms. Choose llama_index if its feature set, stack or MIT licence fits better. Both are self-hostable.