Rental Screening Startup 100 Acquires Fraud Detection Firm Cobblestone Labs

Why It Matters

The acquisition equips 100 with advanced AI underwriting, addressing a surge in rental fraud that Deloitte forecasts could cost $40 billion by 2027, and positions the company as a leading proptech provider for large‑scale landlords.

Key Takeaways

• 100 acquires Cobblestone Labs, adding AI underwriting to rental screening
• Cobblestone’s AI platform targets identity, income, and synthetic‑fraud in leasing
• Rental fraud in US projected to hit $40 billion by 2027
• 100 reports 67% faster applications and 35% lower delinquency post‑integration
• Cobblestone co‑founders become strategic advisers at 100

Pulse Analysis

The U.S. rental market is grappling with an unprecedented wave of fraud, driven in part by generative AI tools that can fabricate convincing identities and documents. Federal investigators reported $275 million in real‑estate fraud losses in 2025, and industry surveys show that more than 90% of multifamily operators have encountered fraud incidents. As landlords seek to protect cash flow and tenant quality, the demand for sophisticated screening solutions that combine data analytics, AI verification, and human oversight has surged.

Against this backdrop, 100’s acquisition of Cobblestone Labs marks a strategic consolidation of AI‑centric underwriting capabilities. Cobblestone’s platform, built by engineers with fintech experience at Ramp, leverages large language models and cross‑checking algorithms to validate income and flag synthetic identities. By embedding this engine into its existing screening suite, 100 can offer a unified workflow that accelerates application processing while reducing false‑positive rejections. Early customer feedback highlights a 67% increase in application velocity and a 35% decline in delinquency, metrics that underscore the tangible financial upside of AI‑enhanced due‑diligence.

Looking forward, the move signals broader industry momentum toward AI‑driven risk management. Deloitte projects AI‑related fraud losses could reach $40 billion by 2027, prompting investors to back proptech firms that can demonstrably mitigate those risks. 100’s recent pre‑seed round of $5.2 million and its designation as a preferred partner by NMHC Top 50 operators suggest strong market validation. As AI models become more accessible, the competitive edge will belong to platforms that can seamlessly blend machine intelligence with human expertise, a niche that 100 now occupies more firmly after the Cobblestone integration.

Deal Summary

Rental screening startup 100 announced the acquisition of fraud detection platform Cobblestone Labs, integrating its AI-native underwriting engine into 100’s rental screening solution. Terms were undisclosed, and Cobblestone co‑founders Jason Scharff and Jack Mastrangelo will join 100 as strategic advisers. The deal aims to enhance fraud detection for institutional landlords.