r/coldcard↗
COLDCARD — Bitcoin signing devices
SECURITY ADVISORY ⚠️ check blogpost. Official COLDCARD subreddit by Coinkite. Help with COLDCARD Q, Mk5 and Mk4; Bitcoin self-custody, air-gapped signing, PSBTs, multisig, NFC, Seed Vault, BIP-85, firmware, and security. Never share a seed phrase, private key, backup, PIN, passphrase, order details, or personal information. Staff will never contact you first or ask for secrets.
6.4k subscribers20 posts / mo in Sep 2026 (incl. ~5% by known bots)16 authors / mosince 2019
r/coldcard has 6.4k members (+24% over the last 12 months). It gets about 20 posts a month from 16 people. Top topics: Cold Wallets & Storage, Seed Phrase Storage & Security and Hardware Wallets.
When to post on r/coldcard
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How r/coldcard has grown
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Topics and brands on r/coldcard
Top topics
Share of the subreddit's posts
- Cold Wallets & Storage19%
- Seed Phrase Storage & Security7.9%
- Hardware Wallets5.4%
- Canadian Crypto Exchange News2.7%
- Trezor Wallets1.8%
Brands people mention
Most-mentioned brands and sites, last 12 months
Posting rules for r/coldcard
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Who posts on r/coldcard
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Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research