OpenSigner

Open-source, self-hostable key management for non-custodial crypto wallets.

ServiceWebfree

OpenSigner is an open-source, self-hostable key management system for non-custodial Ethereum and Solana wallets. It issues, stores, and recovers keys using threshold cryptography, splitting private keys across device, hot, and cold shares that are only reconstructed ephemerally for signing, keeping full custody control with the operator rather than a closed SaaS vendor. It's aimed at developers building wallet or crypto-adjacent products who want to avoid single-vendor key custody, and the project is currently undergoing a Quantstamp audit.

Website

Full match profile

Behind the summary, Matchbox keeps a richer profile of OpenSigner - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

Claim OpenSigner to unlock →

Something wrong with this listing — dead link, not a real product, wrong info?

Try Matchbox with your own problem

Describe what is not working - we’ll show you whether OpenSigner (or something else) actually fits.

Try a problem