head to head · open source
azerothcore-wotlk vs zfoo
azerothcore-wotlk has 8,966 GitHub stars, 3,818 forks, 2,445 open issues and last shipped today. zfoo has 2,015 stars, 415 forks, 19 open issues and last shipped 4 months ago. azerothcore-wotlk leads on adoption by 345% (8,966 vs 2,015 stars). azerothcore-wotlk is written in C++ under GPL-2.0; zfoo is written in Java under Apache-2.0. azerothcore-wotlk has attracted 43% as many forks as stars, zfoo 21%. azerothcore-wotlk was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (game-server), 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
| azerothcore-wotlk | zfoo | |
|---|---|---|
| GitHub stars | ★ 9.0K | ★ 2.0K |
| License | GPL-2.0 | Apache-2.0 |
| Written in | C++ | Java |
| Last push | 2026-09-25 | 2026-05-29 |
| Forks | ⑂ 3.8K | ⑂ 415 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick azerothcore-wotlk if
- You weight community size — 9.0K stars and counting
- You want the GPL-2.0 license terms
- Your stack matches C++
- You value the larger contributor base for long-term maintenance
pick zfoo if
- You want the zfoo feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and zfoo fits your workflow better
About azerothcore-wotlk
AzerothCore (azerothcore wotlk) is an open source, modular C++ game server and framework that recreates the World of Warcraft patch 3.3.5a experience, built for people who want to run and extend their own MMORPG server rather than pay for one.
read the full azerothcore-wotlk overview →
About zfoo
zfoo is an Apache 2.0 licensed Java server framework for RPC, game servers and web servers, aimed at teams that need very high throughput and want to keep server configuration small and simple.
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Frequently asked questions
Is azerothcore-wotlk or zfoo more popular?
azerothcore-wotlk has 8,966 GitHub stars and zfoo has 2,015. azerothcore-wotlk has the larger community by that measure.
Are azerothcore-wotlk and zfoo free?
Both are open source. azerothcore-wotlk is licensed under GPL-2.0 and zfoo under Apache-2.0. Neither carries a licence fee.
What is the difference between azerothcore-wotlk and zfoo?
azerothcore-wotlk is written in C++ and zfoo 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, azerothcore-wotlk or zfoo?
Choose azerothcore-wotlk if you want the larger community (8,966 stars) or its GPL-2.0 licence terms. Choose zfoo if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.