head to head · open source
Onlook vs cpeditor
Onlook has 26,773 GitHub stars, 2,106 forks, 380 open issues and last shipped 28 days ago. cpeditor has 2,179 stars, 162 forks, 79 open issues and last shipped 2 days ago. Onlook leads on adoption by 1,129% (26,773 vs 2,179 stars). Onlook is written in TypeScript under Apache-2.0; cpeditor is written in C++ under GPL-3.0. Onlook has attracted 8% as many forks as stars, cpeditor 7%. cpeditor was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ide), 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
| Onlook | cpeditor | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 2.2K |
| License | Apache-2.0 | GPL-3.0 |
| Written in | TypeScript | C++ |
| Last push | 2026-08-25 | 2026-09-20 |
| Forks | ⑂ 2.1K | ⑂ 162 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Onlook if
- You weight community size — 27K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick cpeditor if
- You want the cpeditor feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches C++
- You evaluated both and cpeditor fits your workflow better
About Onlook
Onlook is an open source, Apache 2.0 visual editor for Next.js and TailwindCSS projects that lets designers and developers edit a running React app in the browser while the underlying code changes in real time.
read the full Onlook overview →
About cpeditor
CP Editor is a free, open source, cross platform integrated development environment built specifically for competitive programming, licensed under GPL 3.0 and aimed at contestants in ACM ICPC, Codeforces and OI style competitions who want to fetch, code, compile, run, check and submit a solution without leaving one window.
read the full cpeditor overview →
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Frequently asked questions
Is Onlook or cpeditor more popular?
Onlook has 26,773 GitHub stars and cpeditor has 2,179. Onlook has the larger community by that measure.
Are Onlook and cpeditor free?
Both are open source. Onlook is licensed under Apache-2.0 and cpeditor under GPL-3.0. Neither carries a licence fee.
What is the difference between Onlook and cpeditor?
Onlook is written in TypeScript and cpeditor in C++. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Onlook or cpeditor?
Choose Onlook if you want the larger community (26,773 stars) or its Apache-2.0 licence terms. Choose cpeditor if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.