Daytona announced a 1B valuation led by FirstMark Growth, total funding $91M. The company positions an Agent Execution Cloud with millisecond-start sandboxes across Linux, Windows, macOS, and GPU environments for short-lived stateful agent workloads. Reported metrics include ~25× revenue growth since January and ~135% average monthly net revenue retention. Customers cited include Meta, Cohere, Writer, Clay, n8n, Postman, and training-data vendors.