---
title: Query Layers
description: Extend TiKV using stateless query layers
menu:
    "5.1":
        parent: Reference
        weight: 2
---

TiKV works as storage engines for the following projects:

* [TiDB](https://github.com/pingcap/tidb) (MySQL)
* [Zetta](https://github.com/zhihu/zetta) (Table Store & HBase)
* [Tidis](https://github.com/yongman/tidis) (Redis)
* [Titan](https://github.com/distributedio/titan) (Redis)
* [Titea](https://github.com/gengmei-tech/titea) (Redis)
* [TiPrometheus](https://github.com/bragfoo/TiPrometheus) (Prometheus)