head to head · open source
CocoIndex vs realtime
CocoIndex has 11,566 GitHub stars, 899 forks, 83 open issues and last shipped 2 days ago. realtime has 7,634 stars, 467 forks, 78 open issues and last shipped yesterday. CocoIndex leads on adoption by 52% (11,566 vs 7,634 stars). CocoIndex is written in Rust under Apache-2.0; realtime is written in Elixir under Apache-2.0. CocoIndex has attracted 8% as many forks as stars, realtime 6%. realtime was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (change-data-capture), 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 | realtime | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 7.6K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Rust | Elixir |
| Last push | 2026-09-16 | 2026-09-17 |
| Forks | ⑂ 899 | ⑂ 467 |
| 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 realtime if
- You want the realtime feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Elixir
- You evaluated both and realtime 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 realtime
Supabase Realtime is a server built with Elixir on the Phoenix Framework that pushes three kinds of realtime functionality to browser and server clients over WebSockets. It lives in the Supabase ecosystem, where it acts as the realtime layer alongside Postgres, and it is distributed as open source under the Apache 2.0 license. The project has been public for roughly seven years, carries 7,632 stars and 463 forks, and its topic list places it in the company of change data capture, CRDT, distributed systems, pubsub, and PostgreSQL tooling.
read the full realtime overview →
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Frequently asked questions
Is CocoIndex or realtime more popular?
CocoIndex has 11,566 GitHub stars and realtime has 7,634. CocoIndex has the larger community by that measure.
Are CocoIndex and realtime free?
Both are open source. CocoIndex is licensed under Apache-2.0 and realtime under Apache-2.0. Neither carries a licence fee.
What is the difference between CocoIndex and realtime?
CocoIndex is written in Rust and realtime in Elixir. 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 realtime?
Choose CocoIndex if you want the larger community (11,566 stars) or its Apache-2.0 licence terms. Choose realtime if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.