Empress Embedded Database vs redb
| Empress Embedded Database | redb | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Linux, Windows | — |
| Supported platforms | Linux, UNIX, FreeBSD, Windows, and real-time platforms (platform availability varies). | Rust crate; no_std targets with atomic compare-and-swap, including Cortex-M3 and above but excluding Cortex-M0 |
| Database model | relational | key-value |
| Query interface | sql | api |
| Encryption | Yes | — |
| Data synchronization | Yes | — |
| Free plan | — | Yes |
Both are listed in Best Embedded Databases. On Freedom251, Empress Embedded Database scores higher on our published basis.