head to head · open source
CocoIndex vs sling-cli
CocoIndex has 11,572 GitHub stars, 900 forks, 83 open issues and last shipped yesterday. sling-cli has 904 stars, 81 forks, 38 open issues and last shipped today. CocoIndex leads on adoption by 1,180% (11,572 vs 904 stars). CocoIndex is written in Rust under Apache-2.0; sling-cli is written in Go under GPL-3.0. CocoIndex has attracted 8% as many forks as stars, sling-cli 9%. sling-cli 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 | sling-cli | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 904 |
| License | Apache-2.0 | GPL-3.0 |
| Written in | Rust | Go |
| Last push | 2026-09-17 | 2026-09-18 |
| Forks | ⑂ 900 | ⑂ 81 |
| 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 sling-cli if
- You want the sling-cli feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Go
- You evaluated both and sling-cli 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 sling-cli
Slings from a data source to a data target. See docs.slingdata.io for more details. Sling is a passion project turned into a free CLI Product which offers an easy solution to create and maintain small to medium volume data pipelines using the Extract & Load (EL) approach. It focuses on data movement between: Database to Database File System to Database Database to File System API to Database API to File System Some key features: Single Binary deployment (built with Go). See installation page. Use Custom SQL as a stream: src stream='select from my table where col1 10' Manage / View / Test / Discover your connectio…
read the full sling-cli overview →
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Frequently asked questions
Is CocoIndex or sling-cli more popular?
CocoIndex has 11,572 GitHub stars and sling-cli has 904. CocoIndex has the larger community by that measure.
Are CocoIndex and sling-cli free?
Both are open source. CocoIndex is licensed under Apache-2.0 and sling-cli under GPL-3.0. Neither carries a licence fee.
What is the difference between CocoIndex and sling-cli?
CocoIndex is written in Rust and sling-cli in Go. 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 sling-cli?
Choose CocoIndex if you want the larger community (11,572 stars) or its Apache-2.0 licence terms. Choose sling-cli if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.