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Trishul Space is a deep-tech aerospace startup developing liquid rocket engines, with Harpy-1 as its flagship engine for small satellite launchers. The engines use staged combustion cycles and AI-driven failure detection. It sells ready-to-integrate propulsion systems to private and government launch vehicle makers. It raised ₹4 crore (about $480K) in a pre-seed round in November 2025, led by IAN Angel Fund with 8X Ventures and ITEL. The team operates from IIT Delhi's Research & Innovation Park.