This is a comparison between notable database engines for the MySQL database management system (DBMS). A database engine (or "storage engine") is the underlying software component that a DBMS uses to create, read, update and delete (CRUD) data from a database.
| Name | Vendor | License | Under active development | MySQL versions | MariaDB versions[1] | ||
|---|---|---|---|---|---|---|---|
| Oracle | GPL | 5.0 - present | 5.1 - present | ||||
| GPL | None | 5.1 - present | |||||
| Oracle | - 5.0 | None | |||||
| Oracle | GPL | 5.0 - present | 5.1 - present | ||||
| GPL | None | 10.0 - present | |||||
| Oracle | GPL | 5.0 - present | 5.1 - present | ||||
| Oracle | GPL | None | |||||
| Oracle | GPL | 5.0 - present | 5.1 - | ||||
| GPL | None | - present | |||||
| Calpont | GPL | None | 10.5.4 - present | ||||
| Oracle | GPL | 3.23 - present | 5.1 - present | ||||
| Oracle | GPL | 3.23 - present | 5.1 - present | ||||
| Mroonga | Groonga Project | GPL | None | 10.0 - present | |||
| Oracle | GPL | 3.23 - present | 5.1 - present | ||||
| GPLv2 | None | 10.2 - present | |||||
| Oracle | GPLv2 | None | |||||
| Oracle | GPLv2 | None | 5.2 - present | ||||
| GPL | None | 10.5 - present | |||||
| SEQUENCE | MariaDB | GPL | None | 10.0 - present | |||
| Sphinx Technologies Inc. | GPL | None | 5.2 - present | ||||
| Kentoku Shiba | GPL | None | 10.0 - present | ||||
| Oracle | GPL | 8.0 - present | None | ||||
| Percona | Modified GPL | None | 5.5 - 10.6[2] | ||||
| Percona | GPL | None | 5.1 - 10.1[3] |