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@YosysHQ

Yosys Headquarters

Yosys Open SYnthesis Suite

YosysHQ - Open Source EDA

OSS CAD Suite: the one-stop shop for our tools

If you want to use our EDA tools, the easiest way is to install the binary release OSS CAD suite, which contains all required dependencies and related tools. Find the documentation here. We also have an OSS CAD Suite github action for using the tools in a github CI workflow.

Tabby CAD Suite is a commercial extension of OSS CAD Suite available from YosysHQ GmbH that additionally includes the Verific frontend for industry-grade SystemVerilog and VHDL support, formal verification with SVA, and formal apps.

Our Projects

Front-ends for applications built on top of Yosys:

  • sby: formal property checking
  • mcy: mutation coverage
  • eqy: equivalence checking

Other notable projects:

  • riscv-formal: formally check compliance with the RISC-V specification
  • picorv32: A Size-Optimized RISC-V CPU
  • nerv: A very simple educational RISC-V CPU for demonstrating riscv-formal

Community

Support us

Like what we do? Please consider either buying a license for the Tabby CAD Suite or becoming a sponsor.

Pinned Loading

  1. yosys Public

    Yosys Open SYnthesis Suite

    C++ 3.8k 933

  2. nextpnr Public

    nextpnr portable FPGA place and route tool

    C++ 1.4k 252

  3. sby Public

    SymbiYosys (sby) -- Front-end for Yosys-based formal verification flows

    Python 445 80

  4. oss-cad-suite-build Public

    Multi-platform nightly builds of open source digital design and verification tools

    Shell 1k 90

Repositories

Showing 10 of 41 repositories
  • yosys Public

    Yosys Open SYnthesis Suite

    C++ 3,766 ISC 933 480 120 Updated Apr 24, 2025
  • nextpnr Public

    nextpnr portable FPGA place and route tool

    C++ 1,421 ISC 252 105 (1 issue needs help) 9 Updated Apr 24, 2025
  • prjpeppercorn-test-cases Public

    Project Peppercorn GateMate Test Cases

    Verilog 7 ISC 1 0 0 Updated Apr 24, 2025
  • oss-cad-suite-build Public

    Multi-platform nightly builds of open source digital design and verification tools

    Shell 1,030 ISC 90 57 3 Updated Apr 24, 2025
  • mcy Public

    Mutation Cover with Yosys (MCY)

    C++ 80 ISC 10 2 0 Updated Apr 23, 2025
  • prjpeppercorn Public

    Project Peppercorn - GateMate FPGA Bitstream Documentation

    Python 18 ISC 2 0 0 Updated Apr 22, 2025
  • furo-ys Public Forked from pradyunsg/furo

    A clean customizable documentation theme for Sphinx

    Sass 1 MIT 347 0 0 Updated Apr 21, 2025
  • apicula Public

    Project Apicula 🐝: bitstream documentation for Gowin FPGAs

    Verilog 549 MIT 72 14 5 Updated Apr 17, 2025
  • rtlil-mlir Public

    Yosys RTLIL dialect for MLIR

    C++ 6 ISC 0 0 0 Updated Apr 16, 2025
  • sby Public

    SymbiYosys (sby) -- Front-end for Yosys-based formal verification flows

    Python 445 80 39 10 Updated Apr 15, 2025