Sardine, a fraud detection service for crypto and fintech clients, raised a $51.5M Series B led by a16z, after a $19.5M Series A in February 2022
As fintechs become more efficient, so too do fraudsters. — “Faster instant payments mean faster fraud,” Sardine CEO and co-founder Soups Ranjan told TechCrunch.
Context & Ripple Effects
Sardine is on a fast cadence: the company raised a $19.5M Series A from a16z, NYCA, and Experian just seven months before this round, and the same lead investor is doubling down at Series B. The pitch has stayed consistent — real-time fraud scores built from users' identities, devices, and behavior — but CEO Soups Ranjan frames the urgency around payment speed itself: faster instant payments mean faster fraud.
The round sits inside a funding lane that keeps widening. Sift crossed a $1B valuation with its 2021 raise after a 2018 Series D, Simility took a Series B with PayPal back in 2017, and Seon later pulled in an $80M Series C led by Sixth Street Growth. Sardine's own arc confirms the lane: it went on to raise a $70M Series C at a $660M valuation in early 2025.
First-order effects
- Sardine gets roughly 2.6x its Series A war chest within seven months, letting it scale device-and-behavior scoring for crypto and fintech clients while a16z deepens its position rather than diversifying away.
- Fintech and crypto customers gain a vendor whose underwriting signal set (identity, device, behavior) is built for real-time decisions, not post-transaction review.
Second-order effects
- Incumbents like Sift — already past a $1B valuation — and fast followers like Seon are forced to compete on the same real-time behavioral-scoring ground, pushing pricing toward per-transaction models tied to instant-payment volume.
- As instant-payment rails spread, banks and fintechs that lack in-house risk teams become dependent buyers, shifting leverage toward whichever vendor scores transactions fastest.
Third-order effects
- If the pattern holds, fraud detection consolidates into a small set of well-capitalized platform vendors whose scores function as infrastructure for instant payments — with Sardine's later move into enterprise AI agents suggesting the endpoint is automated risk response, not just scoring.
- Regulators and payment networks face a structural question as fraud velocity tracks payment velocity: whether real-time scoring becomes a de facto compliance layer for instant-payment schemes.
The trend: Fraud detection is becoming a capital-intensive arms race where each generation of faster payment rails drives larger venture rounds for vendors selling real-time behavioral scoring.