head to head · open source
PageIndex vs dagster
PageIndex has 35,678 GitHub stars, 3,148 forks, 103 open issues and last shipped yesterday. dagster has 16,169 stars, 2,294 forks, 2,589 open issues and last shipped yesterday. PageIndex leads on adoption by 121% (35,678 vs 16,169 stars). PageIndex is written in Python under MIT; dagster is written in Python under Apache-2.0. PageIndex has attracted 9% as many forks as stars, dagster 14%. dagster 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
| PageIndex | dagster | |
|---|---|---|
| GitHub stars | ★ 36K | ★ 16K |
| License | MIT | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 3.1K | ⑂ 2.3K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick PageIndex if
- You weight community size — 36K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick dagster if
- You want the dagster 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 dagster fits your workflow better
About PageIndex
PageIndex is a vectorless, reasoning based retrieval augmented generation engine written in Python and released under the MIT license. It lives in the AI and machine learning infrastructure ecosystem, with topics spanning RAG, information retrieval, LLM reasoning, context engineering, and agentic AI. Instead of building a vector index, PageIndex generates a hierarchical tree index for each document and then lets a large language model reason its way through that tree, in the same way a human expert turns to the right section of a long report. The project ships as a Python SDK, a hosted cloud service, and a docume…
read the full PageIndex overview →
About dagster
Dagster is a cloud native data pipeline orchestrator written in Python and released under the Apache 2.0 licence, built for data engineers, data scientists, and machine learning teams who declare the tables, data sets, models, and reports their pipelines should produce and need those assets tested, observable, and kept up to date from local development through production.
read the full dagster overview →
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Frequently asked questions
Is PageIndex or dagster more popular?
PageIndex has 35,678 GitHub stars and dagster has 16,169. PageIndex has the larger community by that measure.
Are PageIndex and dagster free?
Both are open source. PageIndex is licensed under MIT and dagster under Apache-2.0. Neither carries a licence fee.
What is the difference between PageIndex and dagster?
PageIndex is written in Python and dagster 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, PageIndex or dagster?
Choose PageIndex if you want the larger community (35,678 stars) or its MIT licence terms. Choose dagster if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.