head to head · open source
Ollama vs langtest
Ollama has 185,702 GitHub stars, 18,873 forks, 3,957 open issues and last shipped yesterday. langtest has 561 stars, 53 forks, 6 open issues and last shipped 2 months ago. Ollama leads on adoption by 33,002% (185,702 vs 561 stars). Ollama is written in Go under MIT; langtest is written in Python under Apache-2.0. Ollama has attracted 10% as many forks as stars, langtest 9%. Ollama 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 | langtest | |
|---|---|---|
| GitHub stars | ★ 186K | ★ 561 |
| License | MIT | Apache-2.0 |
| Written in | Go | Python |
| Last push | 2026-11-02 | 2026-08-28 |
| Forks | ⑂ 19K | ⑂ 53 |
| 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 langtest if
- You want the langtest 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 langtest 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 langtest
LangTest: Deliver Safe & Effective Language Models Project's Website • Key Features • How To Use • Benchmark Datasets • Community Support • Contributing • Mission • License Project's Website Take a look at our official page for user documentation and examples: langtest.org Key Features Generate and execute more than 60 distinct types of tests only with 1 line of code Test all aspects of model quality: robustness, bias, representation, fairness and accuracy. Automatically augment training data based on test results (for select models) Support for popular NLP frameworks for NER, Translation and Text…
read the full langtest overview →
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Frequently asked questions
Is Ollama or langtest more popular?
Ollama has 185,702 GitHub stars and langtest has 561. Ollama has the larger community by that measure.
Are Ollama and langtest free?
Both are open source. Ollama is licensed under MIT and langtest under Apache-2.0. Neither carries a licence fee.
What is the difference between Ollama and langtest?
Ollama is written in Go and langtest 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 langtest?
Choose Ollama if you want the larger community (185,702 stars) or its MIT licence terms. Choose langtest if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.