head to head · open source
mall vs GreptimeDB
mall has 84,789 GitHub stars, 29,826 forks, 15 open issues and last shipped 3 days ago. GreptimeDB has 6,680 stars, 543 forks, 264 open issues and last shipped yesterday. mall leads on adoption by 1,169% (84,789 vs 6,680 stars). mall is written in Java under Apache-2.0; GreptimeDB is written in Rust under Apache-2.0. mall has attracted 35% as many forks as stars, GreptimeDB 8%. GreptimeDB 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
| mall | GreptimeDB | |
|---|---|---|
| GitHub stars | ★ 85K | ★ 6.7K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Java | Rust |
| Last push | 2026-09-15 | 2026-09-17 |
| Forks | ⑂ 30K | ⑂ 543 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick mall if
- You weight community size — 85K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Java
- You value the larger contributor base for long-term maintenance
pick GreptimeDB if
- You want the GreptimeDB feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and GreptimeDB fits your workflow better
About mall
mall is a complete e commerce system built on Spring Boot and MyBatis, distributed as a Java project under the Apache 2.0 license. It ships two applications in one repository: a storefront system for shoppers and an administrative back office for operators. The storefront covers the home portal, product recommendation, product search, product display, shopping cart, order flow, member center, customer service, and help center. The back office covers product management, order management, member management, promotion management, operations management, content management, statistics reports, finance management, perm…
About GreptimeDB
GreptimeDB is an open source observability database built on a single columnar engine that stores metrics, logs, and traces together. It lives in the cloud native infrastructure and operations ecosystem, written in Rust and licensed under Apache 2.0. All three signal types share one table model composed of tags, a timestamp, and fields, so when signals carry common identifiers such as service, host, or trace ID, they can be correlated in SQL without moving data between separate databases. Compute and storage are disaggregated: object storage holds the data while memory and local disk caches keep recent and freque…
read the full GreptimeDB overview →
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Frequently asked questions
Is mall or GreptimeDB more popular?
mall has 84,789 GitHub stars and GreptimeDB has 6,680. mall has the larger community by that measure.
Are mall and GreptimeDB free?
Both are open source. mall is licensed under Apache-2.0 and GreptimeDB under Apache-2.0. Neither carries a licence fee.
What is the difference between mall and GreptimeDB?
mall is written in Java and GreptimeDB in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, mall or GreptimeDB?
Choose mall if you want the larger community (84,789 stars) or its Apache-2.0 licence terms. Choose GreptimeDB if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.