Payments · company signal
Castle @savewithcastle
a bitcoin-powered financial stack for businesses
first flagged
2026-04-23
followers
1,328
tracked investors following
7
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. 7 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 7 follows on Castle, plus every company they follow next. start a 7-day free trial →
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data updated 2026-09-09 · trending payments startups · trending this week · startups by sector