head to head · open source
excelize vs preswald
excelize has 21,036 GitHub stars, 1,984 forks, 131 open issues and last shipped yesterday. preswald has 4,272 stars, 647 forks, 330 open issues and last shipped 5 months ago. excelize leads on adoption by 392% (21,036 vs 4,272 stars). excelize is written in Go under BSD-3-Clause; preswald is written in Python under Apache-2.0. excelize has attracted 9% as many forks as stars, preswald 15%. excelize was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai, 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
| excelize | preswald | |
|---|---|---|
| GitHub stars | ★ 21K | ★ 4.3K |
| License | BSD-3-Clause | Apache-2.0 |
| Written in | Go | Python |
| Last push | 2026-11-02 | 2026-06-11 |
| Forks | ⑂ 2.0K | ⑂ 647 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick excelize if
- You weight community size — 21K stars and counting
- You want the BSD-3-Clause license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick preswald if
- You want the preswald feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and preswald fits your workflow better
About excelize
Excelize Introduction Excelize is a library written in pure Go providing a set of functions that allow you to write to and read from XLAM / XLSM / XLSX / XLTM / XLTX files. Supports reading and writing spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports complex components by high compatibility, and provided streaming API for generating or reading data from a worksheet with huge amounts of data. This library needs Go version 1.25.0 or later. The full docs can be seen using go's built in documentation tool, or online at go.dev and docs reference. Basic Usage Installation If your…
read the full excelize overview →
About preswald
Create interactive data apps with a full data stack that runs in the browser (no local dependencies!),runs offline, and is shareable in a single file. What is Preswald? Preswald is a static site generator for building interactive data apps in Python. It packages compute, data access, and UI into self contained data apps that run locally in the browser. Built on a WASM runtime with Pyodide and DuckDB, Preswald enables portable, file based apps that are fast, reactive, and shareable. You can think of Preswald as a lightweight alternative to heavier web app platforms. It provides built in UI components and reactive…
read the full preswald overview →
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Frequently asked questions
Is excelize or preswald more popular?
excelize has 21,036 GitHub stars and preswald has 4,272. excelize has the larger community by that measure.
Are excelize and preswald free?
Both are open source. excelize is licensed under BSD-3-Clause and preswald under Apache-2.0. Neither carries a licence fee.
What is the difference between excelize and preswald?
excelize is written in Go and preswald in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, excelize or preswald?
Choose excelize if you want the larger community (21,036 stars) or its BSD-3-Clause licence terms. Choose preswald if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.