head to head · open source
Ollama vs datachain
Ollama has 185,702 GitHub stars, 18,873 forks, 3,957 open issues and last shipped yesterday. datachain has 2,830 stars, 178 forks, 101 open issues and last shipped yesterday. Ollama leads on adoption by 6,462% (185,702 vs 2,830 stars). Ollama is written in Go under MIT; datachain is written in Python under Apache-2.0. Ollama has attracted 10% as many forks as stars, datachain 6%. datachain 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
| Ollama | datachain | |
|---|---|---|
| GitHub stars | ★ 186K | ★ 2.8K |
| License | MIT | Apache-2.0 |
| Written in | Go | Python |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 19K | ⑂ 178 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Ollama if
- You weight community size — 186K stars and counting
- You want the MIT license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick datachain if
- You want the datachain feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and datachain fits your workflow better
About Ollama
Ollama Start building with open models. Download macOS or download manually Windows or download manually Linux Manual install instructions Docker The official Ollama Docker image ollama/ollama is available on Docker Hub. Libraries ollama python ollama js Community Discord 𝕏 (Twitter) Reddit Get started You'll be prompted to run a model or connect Ollama to your existing agents or applications such as Claude Code , OpenClaw , OpenCode , Codex , Copilot , and more. Coding To launch a specific integration: Supported integrations include Claude Code, Codex, Copilot CLI, DeepSeek Harness, Droid, and OpenCode. AI…
read the full Ollama overview →
About datachain
DataChain: The Context Layer for Unstructured Data A Python library that turns files in S3, GCS, and Azure into versioned, typed datasets, queryable at warehouse speed. Compute Engine : parallel Python over files, distributed on Studio. Async I/O, checkpoint recovery, incremental updates. Dataset DB : Pydantic schemas, versioning, file pointers, automatic lineage. Sub second filter, join, and group by over millions of typed records locally, hundreds of millions on Studio. Vector search over the same rows, no separate store. Optional, for agent workflows: Knowledge Base : markdown summaries derived from the…
read the full datachain overview →
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Frequently asked questions
Is Ollama or datachain more popular?
Ollama has 185,702 GitHub stars and datachain has 2,830. Ollama has the larger community by that measure.
Are Ollama and datachain free?
Both are open source. Ollama is licensed under MIT and datachain under Apache-2.0. Neither carries a licence fee.
What is the difference between Ollama and datachain?
Ollama is written in Go and datachain 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 datachain?
Choose Ollama if you want the larger community (185,702 stars) or its MIT licence terms. Choose datachain if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.