transaction-monitoring
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The Tiny Clues SEON Uses to Catch a $300 Billion Problem
Fraud rarely arrives wearing a name tag. SEON turns more than 900 digital, device and behavioral signals into decisions that risk teams can inspect, tune and act on in real time.
The Software That Turns Financial Crime Investigators Into Case-Closing Machines
Anti-money-laundering work is where good design goes to die. Hummingbird bet the opposite - that compliance investigators deserve tools as sharp as the criminals they chase.
Didit
Didit is a San Francisco-based identity and fraud infrastructure company building one API for KYC, KYB, AML, biometrics, liveness and transaction monitoring across 220+ countries and 14,000+ document types. Founded by identical-twin brothers Alberto and Alejandro Rosas, it offers 500 free verifications per month forever and pay-as-you-go pricing from $0.33 per KYC check, aiming to become the identity layer for an internet where telling humans from bots is getting harder.
Dojah
Dojah is a Lagos-based identity verification and anti-fraud infrastructure company that helps digital businesses onboard users, verify identities, and stay compliant through a single API and no-code tools. It aggregates KYC, KYB, AML, biometric, document and address checks across Africa and beyond, letting fintechs, banks, and marketplaces confirm who they are dealing with in seconds. A Y Combinator W22 company, Dojah serves customers including OPay, FCMB, Cowrywise and Fincra.
Fenrock AI
Fenrock AI is a San Francisco startup from Y Combinator's Winter 2026 batch building AI agents for the banking back office, starting with financial crime compliance. Its AI workspace helps compliance analysts investigate AML and fraud alerts at roughly 20x their normal volume while keeping bullet-proof audit logs and human oversight. Founded by repeat entrepreneur Charu Sharma and ex-Apple/Google machine-learning engineer Michael M, the company overlays on a bank's existing stack to automate investigations, loan processing, and complaint resolution.
Pomelo
Pomelo (Pomelo Group) is a London- and Singapore-based payments technology company that provides a unified, API-based Payment Platform-as-a-Service. It gives financial institutions, fintechs and enterprises ready-to-use payment rails, merchant onboarding and management, transaction monitoring, and a range of acceptance methods - from QR codes and tap-to-pay to payment links and card issuing - under a single white-label platform. Founded in 2017 as Pomelo Pay, the company has grown into a regulated e-money issuer serving 2,000+ businesses across the UK and Southeast Asia.
Elementus
Elementus is a New York-based blockchain intelligence company that adds an identity layer to raw on-chain data, letting banks, regulators, government agencies and investigators trace crypto transactions, score risk, detect sanctions exposure and follow the money across multiple chains. Founded in 2018 by data scientist Max Galka, the company pairs proprietary attribution data with forensic algorithms and became widely known for mapping the flow of funds in the Celsius and BlockFi bankruptcies.
Merkle Science
Merkle Science is a blockchain analytics and predictive risk intelligence company that helps crypto exchanges, financial institutions, government agencies and Web3 businesses detect, investigate and prevent illicit cryptocurrency activity. Founded in Singapore in 2018 by Mriganka Pattnaik and Nirmal Ak, it uses behavior-based machine learning rather than static blacklists to power its two core products - Compass for real-time transaction monitoring and compliance (AML/KYC/CFT), and Tracker for cross-chain forensic investigations across 10,000+ assets and 200+ bridges.
NICE Actimize
NICE Actimize is the financial-crime, risk and compliance division of NICE Ltd. and one of the largest providers of anti-money laundering, fraud prevention and trading-surveillance software to banks, regulators and financial institutions worldwide. Its AI-driven X-Sight platform, ActOne case management and SURVEIL-X surveillance suite help more than a thousand institutions detect suspicious activity, screen against sanctions lists, manage regulatory reporting and investigate financial crime - increasingly using agentic AI to cut investigation time.
Silent Eight
Silent Eight is a Singapore-headquartered regtech company that builds purpose-built artificial intelligence for financial crime compliance. Its Iris platform automates name screening, transaction screening, transaction monitoring, investigation and case documentation for banks, producing decisions with written, auditable narratives instead of black-box scores. The company is used by Tier 1 institutions including HSBC and Standard Chartered, and has raised roughly $55 million to date, including a $40 million Series B in 2022.
Solidus Labs
Solidus Labs is a New York-based crypto-native risk monitoring and market surveillance company founded in 2018 by former Goldman Sachs engineers. Its flagship HALO platform combines trade surveillance, transaction monitoring and threat intelligence to help crypto exchanges, brokers, custodians, stablecoin issuers and regulators detect market manipulation, fraud and money laundering across onchain and offchain markets. HALO monitors over one trillion events daily, deploys 50+ crypto-native abuse typologies, and in 2025 was selected by the EU's ESMA as a trade surveillance provider under MiCA.
Taktile
Taktile is an AI decision platform for banks, insurers and fintechs. Its Agentic Decision Platform lets risk and engineering teams combine AI agents, business rules, third-party data and human oversight to automate high-stakes decisions - approving customers, underwriting credit, flagging fraud and processing claims - using low-code building blocks, 200+ data integrations, and built-in testing and monitoring. Founded in 2020 by Maik Taro Wehmeyer and Maximilian Eber, the company operates across New York, Berlin, London, Sao Paulo and Iasi, and raised a $110M Series C led by Goldman Sachs Alternatives in June 2026.
Feedzai
Feedzai is an AI-native platform that helps banks and financial institutions detect and prevent fraud and financial crime in real time. Founded in Portugal in 2011, its RiskOps platform unifies fraud detection, anti-money laundering, transaction monitoring, identity verification and scam prevention across the customer lifecycle. Feedzai screens transactions for institutions such as Citi and Lloyds Banking Group, and in 2025 was selected by the European Central Bank to help safeguard the forthcoming digital euro. The company reached a $2 billion valuation in October 2025.
Bretton AI
Bretton AI, formerly Greenlite AI, builds an AI-native platform for the financial back office - deploying audit-ready AI agents that run compliance, risk and fraud operations for OCC-, FDIC- and Federal Reserve-regulated banks and fintechs. The agents ingest alerts and policies, consolidate evidence across systems, auto-resolve low-risk cases and escalate complex matters with cited, traceable narratives. Founded in 2023 by Will Lawrence and Alex Jin, the company rebranded from Greenlite to Bretton in February 2026 alongside a $75M Series B led by Sapphire Ventures.
Flagright
Flagright is an AI-native financial crime compliance platform that gives fintechs, banks, and crypto firms a single system for transaction monitoring, sanctions and watchlist screening, dynamic risk scoring, case management, and regulatory filing. Founded in 2022 by Baran Ozkan and Madhu G. Nadig after Baran spent roughly 18 months failing to find a real-time monitoring vendor he liked, the company sells what it calls an 'AI operating system for compliance' - including an agentic investigation engine, AI Forensics, that runs alert investigations end to end. It serves 100+ financial institutions across 35+ countries and raised a $12.5M Series A in June 2026.
StandardC
StandardC is a San Francisco fintech that builds compliance and risk-management software for banks, credit unions and other financial institutions serving high-risk, cash-intensive industries - most notably cannabis-related businesses. Its AI-assisted platform bundles onboarding (ApplyC), KYC/KYB screening and continuous monitoring (MonitorC), GPS-verified virtual site inspections (VerifyC) and examiner-ready audit logging so smaller institutions can bank regulated sectors without drowning in manual BSA/AML work.
Variance
Variance builds investigative AI agents that automate risk and compliance work for banks, fintechs, and Fortune 500 platforms - handling KYC, KYB, AML, transaction monitoring, and fraud investigations that would otherwise take teams of analysts days to complete. Founded in 2023 by ex-Apple fraud engineers Karine Mellata and Michael Lin (originally as the trust-and-safety startup Intrinsic), the company raised a $21.5M Series A in March 2026 led by Ten Eleven Ventures.
Arva AI
Arva AI builds enterprise-grade AI agents that do the manual grunt work of financial crime compliance - screening, KYB/KYC onboarding, and transaction monitoring - for regulated banks and fintechs. Its agents autonomously resolve the majority of alerts and reviews (roughly 91% of screening alerts, 87% of KYB/KYC assessments, and 86% of transaction-monitoring alerts), cutting onboarding times from days to seconds and compliance operations spend by up to 80%. Founded in 2024 by Rhim Shah and Oli Wales and part of Y Combinator's Summer 2024 batch, the New York-based company raised a $3M seed round led by Google's Gradient Ventures in January 2025.
Castle
Castle is a New York-based fintech building payments infrastructure for the roughly $3 trillion Americans spend on their homes each year. Its consumer app turns the chaotic paperwork of homeownership - utility bills, property and school taxes, insurance, renovations and maintenance - into a single digital filing cabinet with automated bill pay, transaction monitoring that surfaces tax credits, rebates and overcharges, and fraud protection. Founded by Madeline Hung after a gut-renovation of a historic Hudson Valley photo studio revealed how little data homeowners have on their biggest asset, Castle says its average customer saves over $10,000.
Consilient
Consilient is a New York- and Washington, D.C.-based financial technology company that applies federated machine learning to anti-money laundering and financial crime detection. Its models learn from behavioral patterns across multiple banks and share the algorithms - not the underlying customer data - so institutions can collaborate on catching illicit activity while preserving privacy. Founded in 2020 as a joint venture between K2 Integrity and Giant Oak, the company's Dozer platform has demonstrated in bank trials that it can sharply cut false positives while improving true-positive detection.
Sphinx
Sphinx builds browser-native AI agents that do the work of a human compliance analyst - running AML, KYC, KYB and enhanced due diligence reviews inside the case-management tools banks and fintechs already use. Every decision is logged and explainable, producing a regulator-ready audit trail. Founded in 2024 by Alexandre Berkovic and Chrisjan Wust and backed by Y Combinator, Sphinx raised a $7.1M seed round in early 2026 and now runs in production across banks, fintechs, crypto platforms and public companies in eight countries.
ComplyAdvantage
ComplyAdvantage is a London-founded RegTech company that uses AI and machine learning to help banks, fintechs and other regulated businesses detect and prevent financial crime. Its flagship Mesh platform combines a proprietary, real-time database of sanctions, watchlists, politically exposed persons (PEPs) and adverse media with customer screening, transaction monitoring, payment screening and fraud detection - automating the heavy, error-prone work of anti-money-laundering (AML) and know-your-customer (KYC) compliance for more than 3,000 enterprises across roughly 75 countries.
Castellum.AI
Castellum.AI is a New York-based regulatory technology company that automates anti-money-laundering and know-your-customer compliance for banks, credit unions, fintechs and crypto firms. Its platform pairs in-house risk data drawn from 200,000+ global sources with explainable AI agents that screen for sanctions, politically exposed persons and adverse media, cutting alert volume by 94% and review time by 83% out of the box. Founded by a former U.S. Treasury sanctions officer, the company raised an $8.5M Series A in July 2025 led by Curql.
Unit21
Unit21 is a San Francisco-based risk and compliance platform that uses agentic AI to detect, investigate, and report financial crime. Its no-code rules engine, transaction monitoring, case management, and AI investigation agents serve banks, credit unions, fintechs, and crypto firms including Chime, Brex, Intuit, Crypto.com, and Jack Henry. The company is responsible for roughly 5% of all SARs filed in the US.
TRM Labs
TRM Labs is a blockchain intelligence company that helps financial institutions, crypto businesses, and government agencies investigate fraud, money laundering, and other financial crimes on-chain. Its platform blends blockchain data, AI agents, and threat intelligence to trace illicit funds across hundreds of blockchains, screen wallets, and support criminal investigations from suspicious-activity alerts to courtroom-ready evidence.