Polymarket, the world’s largest prediction market, has enabled instant bitcoin deposits over the Lightning Network, with new rails powered by the Spark protocol crediting funds in under one second.
Key Takeaways
Polymarket now credits bitcoin Lightning deposits in under 1 second via Spark, versus 10–60 minutes onchain.Spark validates BTC transfers at broadcast, replacing the 3–6 confirmations Polymarket required since October 2025.Kalshi’s $5.42 billion April volume lead over Polymarket raises the stakes for faster funding rails in 2026.
