head to head · open source
perspective vs ktx
perspective has 11,232 GitHub stars, 1,338 forks, 39 open issues and last shipped 2 days ago. ktx has 1,598 stars, 105 forks, 52 open issues and last shipped 9 days ago. perspective leads on adoption by 603% (11,232 vs 1,598 stars). perspective is written in Rust under Apache-2.0; ktx is written in TypeScript under Apache-2.0. perspective has attracted 12% as many forks as stars, ktx 7%. perspective was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (analytics), 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
| perspective | ktx | |
|---|---|---|
| GitHub stars | ★ 11K | ★ 1.6K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Rust | TypeScript |
| Last push | 2026-09-18 | 2026-09-11 |
| Forks | ⑂ 1.3K | ⑂ 105 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick perspective if
- You weight community size — 11K 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 ktx if
- You want the ktx feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and ktx fits your workflow better
About perspective
Perspective is an interactive analytics and data visualization component for large, real time and streaming datasets, built for developers and data teams who create user configurable reports, dashboards and notebook applications on top of a high performance streaming query engine.
read the full perspective overview →
About ktx
ktx is an open source, Apache 2.0 licensed executable context layer, built and maintained by Kaelio in TypeScript, that lets AI agents such as Claude Code, Codex, Cursor, and OpenCode query analytical warehouses accurately using approved metric definitions, detected joinable columns, and company knowledge.
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Frequently asked questions
Is perspective or ktx more popular?
perspective has 11,232 GitHub stars and ktx has 1,598. perspective has the larger community by that measure.
Are perspective and ktx free?
Both are open source. perspective is licensed under Apache-2.0 and ktx under Apache-2.0. Neither carries a licence fee.
What is the difference between perspective and ktx?
perspective is written in Rust and ktx in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, perspective or ktx?
Choose perspective if you want the larger community (11,232 stars) or its Apache-2.0 licence terms. Choose ktx if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.