head to head · open source
Odoo vs rebuild
Odoo has 54,424 GitHub stars, 33,741 forks, 10,282 open issues and last shipped yesterday. rebuild has 1,069 stars, 257 forks, 10 open issues and last shipped yesterday. Odoo leads on adoption by 4,991% (54,424 vs 1,069 stars). Odoo is written in Python under a custom or non-standard licence; rebuild is written in Java under GPL-3.0. Odoo has attracted 62% as many forks as stars, rebuild 24%. Odoo was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (erp), 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
| Odoo | rebuild | |
|---|---|---|
| GitHub stars | ★ 54K | ★ 1.1K |
| License | Custom / other | GPL-3.0 |
| Written in | Python | Java |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 34K | ⑂ 257 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Odoo if
- You weight community size — 54K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick rebuild if
- You want the rebuild feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Java
- You evaluated both and rebuild fits your workflow better
About Odoo
Odoo is an open source suite of business applications built as modular web apps, forming a full featured ERP when combined. It lives in the Python based ecosystem and provides pre built modules for core business functions including CRM, accounting, inventory, e commerce, and HR, all sharing a unified data model and interface.
About rebuild
REBUILD is a highly configurable, open source enterprise management system written in Java and licensed under GPL 3.0, built for enterprise IT teams, small and medium businesses, business managers and developers who need to assemble systems such as CRM, WMS, MES, HRM, TMS or ERP through zero code and low code configuration.
read the full rebuild overview →
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Frequently asked questions
Is Odoo or rebuild more popular?
Odoo has 54,424 GitHub stars and rebuild has 1,069. Odoo has the larger community by that measure.
Are Odoo and rebuild free?
Both are open source. Odoo has no licence declared in this registry, and rebuild is licensed under GPL-3.0. Both are free to self-host.
What is the difference between Odoo and rebuild?
Odoo is written in Python and rebuild in Java. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Odoo or rebuild?
Choose Odoo if you want the larger community (54,424 stars) or its Custom / other licence terms. Choose rebuild if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.