Hey Product Hunt 👋
We’re excited to share OpenSigner — a self-hostable, open-source, non-custodial key management layer for modern apps.
With OpenSigner, developers can create and manage wallets for their users (starting with Ethereum & Solana support, more chains coming) without ever taking custody of their keys. That means you can ship wallets inside:
fintech & banking apps
consumer products & platforms
games, agents, and new crypto-native experiences
…without becoming a custodian.
Why it matters:
Non-custodial by design – Users control their keys; you avoid heavy custodial licensing and compliance burdens.
Flexible & self-hostable – Start in the cloud, move pieces on-prem as you scale or your legal team requires it. No vendor lock-in.
Built for builders – Plug into your existing auth stack, keep full control over infra, and stay standards-aligned.
We’d love your feedback, questions, and brutal technical reviews in the comments 💚