San Francisco-based Doppel has acquired Y Combinator-backed PropRise. PropRise had reached high six figures in annual recurring revenue. Co-founders Jean-Michael Diei and Matthew Krager will join Doppel's engineering team.
Founder backgrounds
Diei and Krager founded PropRise in 2023. Both are former Stripe employees and Y Combinator alumni. The acquisition adds founder experience to Doppel's growing engineering team.
Company growth
In 2026, Doppel expanded its global presence in Japan and Toronto. The company also introduced new capabilities across its platform and surpassed 300 employees. CTO Rahul Madduluri said the engineering team is focused on hard technical problems.
How the platform works
Doppel's platform unifies digital risk protection, human risk management, and email security. It uses agentic AI to detect and connect threats across channels. Shared threat data helps disrupt attack infrastructure and strengthen employee resilience.
Doppel is hiring for open roles across the company. Interested candidates can visit its careers page. The company was also named to Fast Company's 2026 Best Workplaces for Innovators list and the 2026-2027 Fortune Cyber 60.