# Cubist

> Cubist is a security-first Web3 infrastructure company that builds hardware-backed key management and confidential compute for digital assets. Its flagship platform, CubeSigner, keeps cryptographic keys sealed inside secure hardware (HSMs and AWS Nitro Enclaves) while giving developers low-latency signing through revocable sessions and a programmable policy engine - resolving the old tradeoff between cold-wallet security and hot-wallet speed. Founded by applied cryptographers and security researchers from Carnegie Mellon and UC San Diego who designed primitives underlying Ethereum and Avalanche, Cubist serves staking providers, DeFi protocols, bridges, and institutions building on internet capital markets.

- **Founded:** 2022
- **Headquarters:** San Diego, California, United States
- **Founders:** Riad Wahby (Co-Founder & CEO), Ann Stefan (Co-Founder & COO), Fraser Brown (Co-Founder & CTO), Deian Stefan (Co-Founder & Chief Scientist)
- **Team size:** ~21 employees
- **Products:** CubeSigner (Self-Custody), CubeSigner (End-User Custody), Programmable Policy Engine, Confidential Cloud Functions, Bitcoin & Babylon Workflows
- **Notable:** Raised $7M seed led by Polychain Capital (March 2023)., Launched CubeSigner, a hardware-backed key management platform, in April 2023., Launched millisecond-latency Wallet-as-a-Service in November 2023.

## Products & services

- **CubeSigner (Self-Custody)** — Hardware-backed, non-custodial key management for teams and protocols. Keys are generated and stored in HSM-sealed AWS Nitro Enclaves; apps request signatures via API through revocable sessions rather than accessing raw keys.
- **CubeSigner (End-User Custody)** — Wallet-as-a-Service and embedded wallet infrastructure with millisecond-latency remote signing inside secure hardware, plus account recovery SDK and encrypted key backups.
- **Programmable Policy Engine** — Policies-as-code execution engine that governs key access - spending limits, role-based access control, multi-party approvals, and anti-slashing rules enforced in hardware before signing.
- **Confidential Cloud Functions** — Private, verifiable off-chain smart contracts running in trusted execution environments (TEEs), enabling on-chain AI agents and hardware-enshrined contracts.
- **Bitcoin & Babylon Workflows** — Advanced Bitcoin signing and self-custodial staking support, including Babylon staking workflows.
- **Bascule Drawbridge** — Real-time bridge security layer providing cross-chain mint/withdrawal verification and on-chain attestation to catch collateral mismatches before funds move.

## Achievements

- Raised $7M seed led by Polychain Capital (March 2023).
- Launched CubeSigner, a hardware-backed key management platform, in April 2023.
- Launched millisecond-latency Wallet-as-a-Service in November 2023.
- Founders published 80+ peer-reviewed security papers and discovered 20+ high-severity CVEs in Chrome and Firefox.
- Founders designed cryptographic primitives underlying Ethereum and Avalanche and co-authored RFC 9380 and the BLS signatures standard.
- Shipped software sandboxing (RLBox) protecting millions of Firefox users.
- Appointed former Gemini executive Rohan Chauhan as President (January 2026) to lead institutional go-to-market.

## Latest updates

- **2026-01** — Named former Gemini executive Rohan Chauhan as President to scale infrastructure for internet capital markets and lead institutional go-to-market.
- **2023-11** — Launched Wallet-as-a-Service platform with millisecond-latency remote signing inside secure hardware.
- **2023-04** — Launched hardware-backed key management platform CubeSigner for Web3 infrastructure.
- **2023-03** — Raised $7M seed round led by Polychain Capital.

## Links

- Website: https://cubist.dev
- LinkedIn: https://www.linkedin.com/company/cubist-inc
- Twitter/X: https://x.com/cubistdev
- GitHub: https://github.com/cubist-labs

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Profile page: https://yespress.io/cubist
Published by YesPress — https://yespress.io
Last updated: 2026-07-06