We built the easiest Bitcoin multisig self-custody solution for mass adoption. Set up in 5 minutes, no tech skills. Your first vault is free, forever.
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🟠 Introducing SignBit, the strongest way to hold Bitcoin.
Free multisig, built for mass adoption. Your coins sit behind several independent keys, so no single hack, lost device or company can take them.
Not even us. 🔐
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This month alone:
🚨 Tampered devices drained over $90M from hundreds of wallets
🚨 A wallet maker's site was breached and 18,000 devices were pulled
🚨 Owners of another device got fake recall emails built to steal their seed words
Self-custody is still the answer. But one device holding everything is one point of failure.
Multisig fixes that. Your coins sit behind several keys, so one lost, stolen or tampered device can't take them.
The problem is that multisig has been gated. Expensive, technical, built for experts.
So we built SignBit. Free multisig, set up in 5 minutes, no tech skills needed.
This isn't a shill. Try it, break it, tell us what's wrong. We're not the finish line, but we think we're a step in the right direction.
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Set up your first vault free at signbit.io
Want to try it with test coins first? testnet.signbit.io
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Multisig is too complex for most people, and one mistake can cost you. We agree.
That's why we built SignBit. Multisig so simple even your grandad could set up a vault.
Not for the majority of users, it’s too complex and risks them making mistakes. Unless you want to make Self Custody even more niche then it already is.
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SignBit retweeted
🟠 Introducing SignBit, the strongest way to hold Bitcoin.
Free multisig, built for mass adoption. Your coins sit behind several independent keys, so no single hack, lost device or company can take them.
Not even us. 🔐
1
5
539
5,590
Yes, self-custody is still the answer.
But what we need is multisig that's free and easy to set up. So easy your grandad can do it.
That's what we built at SignBit.
“Just self-custody your Bitcoin, bro.”
Self-custody in 2026:
• Coldcard: weak entropy, ~$116M stolen
• Ledger: customer data leak + hardware implants, $86M+ stolen
• Trezor: 80,689 customer records leaked
• Trezor again: 347,149 emails exposed
• Keystone: authentication key stolen, 18,835 wallets being destroyed
• Keystone again: USB exploit capable of seed extraction
• SafePal: 39,798 customer records exposed
• Foundation Passport: 23,000+ phishing attempts
• BitBox: email list stolen + phishing campaign
• BitBox again: multiple critical firmware bugs
• Tangem: physical password-reset exploit
Self-custody is still the answer.
But damn, HWW companies have had a YEAR.
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🟠 Introducing SignBit, the strongest way to hold Bitcoin.
Free multisig, built for mass adoption. Your coins sit behind several independent keys, so no single hack, lost device or company can take them.
Not even us. 🔐
1
5
539
5,590
Real people, when it matters. Open a ticket and you reach a person who can already see your vault's full picture, any day of the week.
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Your first vault is free, forever. A 2-of-3 vault, keyholders you invite, and Fountain for every key. Most people finish setting up in about 15 minutes.
Start at signbit.io, with step-by-step guides at signbit.io/guides
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