head to head · open source
uBlock vs competitive-companion
uBlock has 69,033 GitHub stars, 4,427 forks, 15 open issues and last shipped yesterday. competitive-companion has 1,339 stars, 220 forks, 90 open issues and last shipped 3 days ago. uBlock leads on adoption by 5,056% (69,033 vs 1,339 stars). uBlock is written in JavaScript under GPL-3.0; competitive-companion is written in TypeScript under MIT. uBlock has attracted 6% as many forks as stars, competitive-companion 16%. uBlock was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (browser-extension), 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
| uBlock | competitive-companion | |
|---|---|---|
| GitHub stars | ★ 69K | ★ 1.3K |
| License | GPL-3.0 | MIT |
| Written in | JavaScript | TypeScript |
| Last push | 2026-11-02 | 2026-10-31 |
| Forks | ⑂ 4.4K | ⑂ 220 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick uBlock if
- You weight community size — 69K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick competitive-companion if
- You want the competitive-companion feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and competitive-companion fits your workflow better
About uBlock
[![Badge Commits]][Commit Rate] [![Badge Issues]][Issues] [![Badge Localization]][Crowdin] [![Badge License]][License] [![Badge NPM]][NPM] [![Badge Mozilla]][Mozilla] ![Badge Chrome] [![Badge Edge]][Edge] uBlock Origin (uBO) GitHub Releases Stable and development versions on Firefox, Chromium MV2, and Thunderbird. Must be placed manually into web browsers; the Chromium and Thunderbird versions usually won't auto update. Related: uBlock Origin Lite uBlock Origin (uBO) is a CPU and memory efficient [wide spectrum content blocker][Blocking] for Chromium and Firefox. It blocks ads, trackers, coin miners, popups…
read the full uBlock overview →
About competitive-companion
Competitive Companion [link cws]: [link amo]: [ ][link cws] [ ][link cws] [ ][link cws] [ ][link amo] [ ][link amo] [ ][link amo] A browser extension which parses competitive programming problems from various online judges (like AtCoder and Codeforces) and sends them to various tools (like CP Editor and CPH). Capable of parsing problems and contests and extracting data like the example testcases and the time and memory constraints. Install [ Chrome extension][link cws] [ ][link cws] [ Firefox add on][link amo] [ ][link amo] Tools that use Competitive Companion acmX AI Virtual Assistant Assistant.nvim AutoCp…
read the full competitive-companion overview →
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Frequently asked questions
Is uBlock or competitive-companion more popular?
uBlock has 69,033 GitHub stars and competitive-companion has 1,339. uBlock has the larger community by that measure.
Are uBlock and competitive-companion free?
Both are open source. uBlock is licensed under GPL-3.0 and competitive-companion under MIT. Neither carries a licence fee.
What is the difference between uBlock and competitive-companion?
uBlock is written in JavaScript and competitive-companion 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, uBlock or competitive-companion?
Choose uBlock if you want the larger community (69,033 stars) or its GPL-3.0 licence terms. Choose competitive-companion if its feature set, stack or MIT licence fits better. Both are self-hostable.