About
Who we are
Lilith Semiconductor, Lilith Semi for short, builds open source silicon and the tools around it.
We build Chock for running AI agents safely against your code, Aegis for fully open-source FPGAs from the silicon up, and Harbor for assembling hardware designs in Dart.
Each one sits at a different point in the same workflow: the agent that writes the code, the FPGA it runs on, and the libraries it pulls in. The thread running through them: building hardware should feel like building software.
- One team across agents, boards, and libraries
- Hardware development should feel like software development
- AI agents run inside a real sandbox, not a polite request to behave
- Tools we built because we wanted to use them
Founders
The two of us
Sebastian Kraus
Co-founder
Developer and entrepreneur focused on information security and infrastructure. Board member of the NixOS Foundation and organiser of NixCon 2024, 2025 and 2026. Leads strategy and partnerships at Chock.
@Ra33it0Tristan Ross
Co-founder
Low-level developer working on operating systems, Zig and Linux. Committer to Nixpkgs and LLVM, and contributor to Zig. Leads the development and operations at Lilith Semiconductor.
@RossComputerGuy
Building with agents, FPGAs, or Dart?
Tell us what you're working on and which of our tools you would reach for first. We will come back with questions and next steps.