lowRISC/opentitan

OpenTitan: Open source silicon root of trust

3,642

stars

27,368

commits

SystemVerilog

primary language

Sep 11, 2026

updated

www.opentitan.org

README

OpenTitan

OpenTitan logo

About the project

OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.

About this repository

This repository contains hardware, software and utilities written as part of the OpenTitan project. It is structured as monolithic repository, or "monorepo", where all components live in one repository. It exists to enable collaboration across partners participating in the OpenTitan project.

Documentation

The project contains comprehensive documentation of all IPs and tools. You can access it online at opentitan.org/book/.

How to contribute

Have a look at CONTRIBUTING and our documentation on project organization and processes for guidelines on how to contribute code to this repository.

Licensing

Unless otherwise noted, everything in this repository is covered by the Apache License, Version 2.0 (see LICENSE for full text).

Contributors

(top 30 of 224)

rswarbrick

2,801 commits

msfschaffner

1,879 commits

cindychip

1,420 commits

timothytrippel

1,360 commits

lowRISC/opentitan

OpenTitan: Open source silicon root of trust

3,642

stars

27,368

commits

SystemVerilog

primary language

Sep 11, 2026

updated

www.opentitan.org

README

OpenTitan

OpenTitan logo

About the project

OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.

About this repository

This repository contains hardware, software and utilities written as part of the OpenTitan project. It is structured as monolithic repository, or "monorepo", where all components live in one repository. It exists to enable collaboration across partners participating in the OpenTitan project.

Documentation

The project contains comprehensive documentation of all IPs and tools. You can access it online at opentitan.org/book/.

How to contribute

Have a look at CONTRIBUTING and our documentation on project organization and processes for guidelines on how to contribute code to this repository.

Licensing

Unless otherwise noted, everything in this repository is covered by the Apache License, Version 2.0 (see LICENSE for full text).

Contributors

(top 30 of 224)

rswarbrick

2,801 commits

msfschaffner

1,879 commits

cindychip

1,420 commits

timothytrippel

1,360 commits

Languages

SystemVerilog

46.6%

C

20.3%

Python

7.2%

Rust

6.2%

Starlark

4.0%

Emacs Lisp

3.8%

C++

3.5%

Smarty

3.4%

Assembly

2.8%