head to head · open source
CocoIndex vs pudl
CocoIndex has 11,572 GitHub stars, 900 forks, 83 open issues and last shipped yesterday. pudl has 605 stars, 145 forks, 502 open issues and last shipped today. CocoIndex leads on adoption by 1,813% (11,572 vs 605 stars). CocoIndex is written in Rust under Apache-2.0; pudl is written in Python under MIT. CocoIndex has attracted 8% as many forks as stars, pudl 24%. pudl was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (etl), 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
| CocoIndex | pudl | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 605 |
| License | Apache-2.0 | MIT |
| Written in | Rust | Python |
| Last push | 2026-09-17 | 2026-09-18 |
| Forks | ⑂ 900 | ⑂ 145 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick CocoIndex if
- You weight community size — 12K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick pudl if
- You want the pudl feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and pudl fits your workflow better
About CocoIndex
CocoIndex is an open source incremental data transformation engine for AI workloads, built in Rust with a Python interface and positioned in the data engineering, ETL, indexing, and AI agent ecosystem. It turns codebases, meeting notes, inboxes, Slack, PDFs, and videos into continuously fresh context for AI agents and LLM applications.
read the full CocoIndex overview →
About pudl
=============================================================================== The Public Utility Data Liberation Project (PUDL) =============================================================================== .. readme intro .. repo status image:: :target: :alt: Project Status: Active .. pytest image:: :target: :alt: PyTest Status .. codecov image:: :target: :alt: Codecov Test Coverage .. docs image:: :target: :alt: Docs Build Status .. oc image:: :target: .. pre commit ci image:: :target: :alt: pre commit CI .. zenodo doi image:: :target: :alt: Zenodo DOI .. office hours image:: :target: :alt: Schedule a 1 on 1…
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Frequently asked questions
Is CocoIndex or pudl more popular?
CocoIndex has 11,572 GitHub stars and pudl has 605. CocoIndex has the larger community by that measure.
Are CocoIndex and pudl free?
Both are open source. CocoIndex is licensed under Apache-2.0 and pudl under MIT. Neither carries a licence fee.
What is the difference between CocoIndex and pudl?
CocoIndex is written in Rust and pudl 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, CocoIndex or pudl?
Choose CocoIndex if you want the larger community (11,572 stars) or its Apache-2.0 licence terms. Choose pudl if its feature set, stack or MIT licence fits better. Both are self-hostable.