Bitcoin Core 2025 development activity rebounds, with the number of contributors and discussion enthusiasm increasing

WuSaidBlockchainW · 2026-01-04T23:55:10+00:00

In 2025, Bitcoin Core development activity rebounded, with email volume increasing by approximately 60% year-over-year, and the number of contributors reaching 135. For the first time, a third-party security audit was completed without discovering any serious vulnerabilities. VanEck allocated 5% of its ETF profits to support development funding.

WuSaidBlockchainW

2026-01-04 23:55:10

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Bitcoin Core’s development activity rebounded in 2025. Casa Chief Security Officer Jameson Lopp summarized that the number of emails on the Bitcoin developer mailing list increased by approximately 60% year-over-year, with a total of 135 different contributors submitting code to the Bitcoin Core repository, up from about 112 in 2024, ending a multi-year downward trend since the 2018 peak; in 2025, Bitcoin Core completed its first public third-party security audit, conducted by Quarkslab and funded by Brink, which found no serious vulnerabilities; in terms of funding support, VanEck continued to allocate 5% of its profit from its spot Bitcoin ETF to support Brink’s development funding. (The Block)

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