head to head · open source
duckdb vs ua-parser-js
duckdb has 41,440 GitHub stars, 3,798 forks, 858 open issues and last shipped yesterday. ua-parser-js has 10,189 stars, 1,217 forks, 14 open issues and last shipped 17 days ago. duckdb leads on adoption by 307% (41,440 vs 10,189 stars). duckdb is written in C++ under MIT; ua-parser-js is written in JavaScript under AGPL-3.0. duckdb has attracted 9% as many forks as stars, ua-parser-js 12%. duckdb 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
| duckdb | ua-parser-js | |
|---|---|---|
| GitHub stars | ★ 41K | ★ 10K |
| License | MIT | AGPL-3.0 |
| Written in | C++ | JavaScript |
| Last push | 2026-09-17 | 2026-09-01 |
| Forks | ⑂ 3.8K | ⑂ 1.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick duckdb if
- You weight community size — 41K stars and counting
- You want the MIT license terms
- Your stack matches C++
- You value the larger contributor base for long-term maintenance
pick ua-parser-js if
- You want the ua-parser-js feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches JavaScript
- You evaluated both and ua-parser-js fits your workflow better
About duckdb
DuckDB is an analytical, in process SQL database management system written in C++ and released under the MIT license. It runs inside the application process rather than as a separate server, and it is distributed as a standalone command line application as well as through clients for Python, R, Java, and WebAssembly. The project lives in the analytical SQL ecosystem, where the topics listed for it are analytics, database, embedded database, OLAP, and SQL. It has been developed for about eight years, with the last push recorded on 15 September 2026.
read the full duckdb overview →
About ua-parser-js
UAParser.js is a dependency free JavaScript library for user agent detection that identifies browsers, operating systems, devices, bots, apps, and AI crawlers, running both in the browser (client side) and in Node.js (server side), and it is aimed at web developers, analytics teams, and product engineers who need to classify the traffic reaching their applications.
read the full ua-parser-js overview →
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Frequently asked questions
Is duckdb or ua-parser-js more popular?
duckdb has 41,440 GitHub stars and ua-parser-js has 10,189. duckdb has the larger community by that measure.
Are duckdb and ua-parser-js free?
Both are open source. duckdb is licensed under MIT and ua-parser-js under AGPL-3.0. Neither carries a licence fee.
What is the difference between duckdb and ua-parser-js?
duckdb is written in C++ and ua-parser-js in JavaScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, duckdb or ua-parser-js?
Choose duckdb if you want the larger community (41,440 stars) or its MIT licence terms. Choose ua-parser-js if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.