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Simulithic

User simulations for production monitoring.

Simulithic continuously uses your production product like your real users do. We learn representative user journeys and run agents across different devices, browsers, account states, and environments to find failures that traditional automated tests miss. When something breaks, we reproduce it and alert engineering before they hear about it from a customer.
Active Founders
Ryan Ning
Ryan Ning
Founder/CEO
Founder at Simulithic (YC F26). Previously SWE @ Uber, Shopify, and AI research @ University of Toronto.
Satyam Singh
Satyam Singh
Founder/CTO
Founder at Simulithic (YC F26). Previously Software Engineer at Ramp and Bree (YC S21).
Simulithic
Founded:2026
Batch:Fall 2026
Team Size:2
Status:
Active
Location:San Francisco
Primary Partner:Aaron Epstein