No approved customer reviews of Substr have been published yet. Read reviews of other Bitcoin financial services in the 21Rates review directory.
A Reddit-style community platform built on Nostr for decentralized and censorship-resistant discussion. While not exclusively financial services, Substr is relevant to the broader Bitcoin and Nostr application ecosystem that supports Bitcoin-native identity and social coordination.
Last updated: June 16, 2026
Compare Substr with other Bitcoin financial services on 21Rates:
407 Bitcoin companies tracked · 23 custodians · 33 Bitcoin ETFs · 21 lenders · 22 exchanges · $106B+ tracked ETF AUM · Rates verified daily