
21st.dev
Github + Pinterest to make your AI websites look beautiful

Open-source non-custodial wallet solution
OpenSigner is an open-source, self-hostable key management stack for non-custodial wallets. Create Ethereum & Solana wallets without custody, plug into any auth, run in our cloud or self-host, avoid vendor lock-in.
OpenSigner first appeared on November 10, 2025, 7 months ago. Its focus lies in the Crypto tools, Open Source, GitHub, and Developer Tools sectors. The startup has built up 103 votes and 6 comments, marking it as an up-and-coming startup.
Browse all startups in Crypto tools, Open Source, GitHub, Developer Tools.
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