Keyspace

Zero-knowledge password manager where the client signs auth challenges, not password hashes.

Mobile appfreemiumglobal

Keyspace is a password manager where users hold their own keys, storing logins, 2FA codes, secure notes, and payment cards under end-to-end encryption derived from a 12-word recovery phrase. Unlike most password managers, it uses a challenge-response signature scheme for authentication so master-password-derived data never crosses the wire, and includes a QR-code Keyroute feature for instant desktop login.

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Behind the summary, Matchbox keeps a richer profile of Keyspace - 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

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