state-management
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Temporal Technologies
Temporal Technologies builds a durable execution platform that lets developers write reliable, long-running applications as if failures never happen. Born from the open-source Temporal engine created by ex-Uber and AWS engineers, it automatically persists application state, retries failed steps, and resumes workflows after crashes. Offered as open source and as the managed Temporal Cloud, it is used by more than 3,000 paying customers including Netflix, Snap, Stripe, and Nvidia, and is increasingly the backbone for reliable, stateful AI agents.
Reflex
Reflex is an open-source, full-stack Python framework and cloud platform that lets developers build and deploy production-grade web apps entirely in Python - no JavaScript required. Founded by ex-Apple and Ancestry engineers Nikhil Rao and Alek Petuskey, the company (originally Pynecone, a Y Combinator W23 startup) wraps React components in Python so data scientists, analysts, and engineers can ship UI, backend, and deployment from a single codebase. It has grown to over a million apps built, 25k+ GitHub stars, and adoption inside Fortune 500 companies.