Fraud Detection Startups funded by Y Combinator (YC) 2026

We are building a safer supply chain. Cargo Theft has been increasing yearly, and the supply chain industry is urgently looking for ways to solve this. Using experience fighting fraud at the largest delivery marketplaces and logistics tech companies, we are building solutions to stop Cargo Theft and improve profit margins and revenue for warehouses and freight brokers.

End-to-end suite of fraud detection and prevention solutions, including an analytics product to monitor and understand dispute + fraud metrics, an AI product which highlights transactions for merchants to follow up on, and an AI solution to recommend rules that can be implemented in payment provider platforms (Stripe, Shopify, Adyen) to proactively reduce dispute + fraud rates.

Finic helps fraud teams catch organized fraud earlier, act on it faster, and turn discoveries into lasting defenses. Our AI agent analyzes structured and unstructured data across your systems to proactively surface the fraud that rules and scoring models miss.

Ballerine is an AI-native risk intelligence platform built for financial institutions, acquirers, and payment providers that need to underwrite and monitor merchants at scale in real time. Instead of relying on fragmented point solutions, Ballerine unifies data from business registries, transaction patterns, sanctions lists, and web intelligence into one composable infrastructure. Its AI Agents continuously analyze these signals to deliver dynamic and explainable risk assessments across the merchant lifecycle. With a modular architecture, teams can automate underwriting, detect emerging risks, and monitor merchant behavior while aligning to their own policies and compliance frameworks. Unlike traditional systems with static models, Ballerine’s AI Agents learn and adapt from live data, uncovering changes in merchant behavior that indicate fraud, laundering, or non-compliance. Already deployed across multiple regions, Ballerine has enabled acquirers and fintechs to accelerate underwriting decisions, reduce manual reviews, and cut false positives, redefining how modern institutions manage merchant risk.

Overwatch Data offers real-time AI agents to scale fraud, cyber, and security teams. Our agents automate the threat intelligence and brand protection workflow, while also conducting risk reviews at scale to detect fraud and financial crime.

Accept and reconcile B2B payments seamlessly.

Inscribe is AI-powered document fraud detection software for banks, credit unions, and lenders. It detects forged, fabricated, and AI-generated financial documents (including deepfake bank statements, manipulated pay stubs, and synthetic tax forms) in seconds, giving risk teams the clarity they need to stop fraud without slowing approvals. Inscribe created the document fraud detection category and has been purpose-built for financial institutions since 2017. Our agentic AI is trained on millions of real-world applications and strengthened by in-house data scientists and fraud experts. According to Inscribe's 2026 State of Document Fraud Report, 1 in 16 documents show signs of fraud — with AI-generated document fraud growing 5x from April to December 2025. Customers include BCU ($5.6M in prevented fraud losses), Logix Federal Credit Union ($3M in losses prevented in 8 months), and Ramp (30-minute reduction in application processing). Inscribe is SOC 2 Type II and ISO 27001 certified, and is backed by Threshold Ventures, Uncork Capital, Y Combinator, Crosslink Capital, and Foundry.

Instantly stop automated and human-originated account takeovers, fake accounts, and any behavior that violates your platform policies.

Smyte stops spam, scams, harassment and credit card fraud for marketplaces and social networks. We automatically classify your website and mobile app's event data and stop bad actors at scale.