Payments · company signal
Castle @savewithcastle
a bitcoin-powered financial stack for businesses
frontrun watches the follow graphs of 2,000+ venture investors on X. Castle was first flagged on 2026-04-23 - the moment tracked investors began converging on it. 9 of them follow today. that count is public; which investors they are, when each followed, and the daily change is what the product shows.
see who's behind the 9 follows on Castle, plus every company they follow next. start a 7-day free trial →
more payments companies on the signal
Proxy (9 tracked) · Basis Theory (9 tracked) · DashX | Payments (9 tracked) · FactMachine (9 tracked) · brale (9 tracked) · dualmint (9 tracked) · Yellow (9 tracked) · Zoth (9 tracked)
data updated 2026-10-05 · trending payments startups · trending this week · startups by sector