head to head · open source
duckdb vs ua-parser-js
duckdb has 42,733 GitHub stars, 4,168 forks, 858 open issues and last shipped 4 days ago. ua-parser-js has 10,213 stars, 1,211 forks, 14 open issues and last shipped 1 months ago. duckdb leads on adoption by 318% (42,733 vs 10,213 stars). duckdb is written in C++ under MIT; ua-parser-js is written in JavaScript under AGPL-3.0. duckdb has attracted 10% 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 | ★ 43K | ★ 10K |
| License | MIT | AGPL-3.0 |
| Written in | C++ | JavaScript |
| Last push | 2026-10-30 | 2026-09-29 |
| Forks | ⑂ 4.2K | ⑂ 1.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick duckdb if
- You weight community size — 43K 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 DuckDB is a high performance analytical database system. It is designed to be fast, reliable, portable, and easy to use. DuckDB provides a rich SQL dialect with support far beyond basic SQL. DuckDB supports arbitrary and nested correlated subqueries, window functions, collations, complex types (arrays, structs, maps), and several extensions designed to make SQL easier to use. DuckDB is available as a standalone CLI application and has clients for Python, R, Java, Wasm, etc., with deep integrations with packages such as pandas and dplyr. For more information on using DuckDB, please refer to the DuckDB…
read the full duckdb overview →
About ua-parser-js
UAParser.js Powerful User Agent detection in a compact, ES5 friendly, dependency free JavaScript library. ✅ Comprehensive detection : Identify various kind of browsers, OS, devices, bots, apps, AI crawlers, and more ✅ Battle tested at scale : Backed by an actively maintained, extensive detection database, trusted by leading tech companies ✅ Runs everywhere : Use seamlessly in browsers, Node.js, and modern JavaScript runtimes Demo Live demo: Documentation version 1.x : version 2.x : Before upgrading from v0.7 / v1.0 , please read CHANGELOG to see what's new & breaking. Package Options Open Source Editions PRO /…
read the full ua-parser-js overview →
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Frequently asked questions
Is duckdb or ua-parser-js more popular?
duckdb has 42,733 GitHub stars and ua-parser-js has 10,213. 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 (42,733 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.