head to head · open source
excelize vs Sendune
excelize has 20,918 GitHub stars, 1,949 forks, 131 open issues and last shipped 2 days ago. Sendune has 2,308 stars, 143 forks, 2 open issues and last shipped 3 months ago. excelize leads on adoption by 806% (20,918 vs 2,308 stars). excelize is written in Go under BSD-3-Clause; Sendune is written in TypeScript under MIT. excelize has attracted 9% as many forks as stars, Sendune 6%. excelize was the more recently maintained of the two, and both are self-hostable with no licence fee.
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 | Sendune | |
|---|---|---|
| GitHub stars | ★ 21K | ★ 2.3K |
| License | BSD-3-Clause | MIT |
| Written in | Go | TypeScript |
| Last push | 2026-09-16 | 2026-06-08 |
| Forks | ⑂ 1.9K | ⑂ 143 |
| 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 Sendune if
- You want the Sendune feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and Sendune fits your workflow better
About excelize
Excelize is a pure Go library for reading and writing XLAM, XLSM, XLSX, XLTM and XLTX spreadsheets, built for Go developers who need to generate or parse Microsoft Excel 2007 and later workbooks directly from their own code.
read the full excelize overview →
About Sendune
Sendune is an open source HTML email template editor and no code designer written in TypeScript and packaged as an Angular library. It was originally built for use within Sendune, formerly Send With SES, and it offers a public live demo at designer.sendune.com. The project sits in the Angular and AWS SES email template ecosystem, where teams need to create and export email HTML without a full marketing platform.
read the full Sendune overview →
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Frequently asked questions
Is excelize or Sendune more popular?
excelize has 20,918 GitHub stars and Sendune has 2,308. excelize has the larger community by that measure.
Are excelize and Sendune free?
Both are open source. excelize is licensed under BSD-3-Clause and Sendune under MIT. Neither carries a licence fee.
What is the difference between excelize and Sendune?
excelize is written in Go and Sendune 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, excelize or Sendune?
Choose excelize if you want the larger community (20,918 stars) or its BSD-3-Clause licence terms. Choose Sendune if its feature set, stack or MIT licence fits better. Both are self-hostable.