Crystil (formerly Payloop, trypayloop.com) is an Austin, Texas-based startup building AI cost-observability software: a one-line SDK that tracks LLM spend in real time by task, agent, and customer so teams can compare model providers and protect margins as usage scales. It also ships prompt-injection and jailbreak defenses under a product called Sentinel. The company was co-founded through Struck Capital's startup studio and disclosed a $4.5M raise via SEC Form D in August 2026.
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Aug 24, 2026
Latest raise
Funding activity · 1 round
Aug 24, 2026
$4.5M
Seed
Led by Struck Capital
Crystil Announces $4.5M Seed Round Crystil, an Austin, Texas based startup formerly known as Payloop, has raised $4.5 million in Seed funding. The round was le…
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