Celest

Celest, previously named Teo, is a B2B company located in San Francisco, CA, specializing in infrastructure services for Flutter and Dart developers. Launched in 2023 and part of the Y Combinator W24 batch, Celest operates primarily in the United States and Canada, serving the B2B infrastructure industry. With a team size of one, Celest is an early-stage company that empowers Flutter developers to become full-stack developers by providing a suite of tools that simplify backend integration. These tools include ‘Cloud Widgets’, which allow for the declarative definition of backend and infrastructure in Dart, and a CLI that facilitates the creation, building, and deployment of Celest projects. The company also offers a type-safe API layer to bridge business logic in the cloud with the UI of Flutter apps and supports a hot-reload mechanism for instant updates during development. Future plans include handling the deployment and management of functions’ underlying infrastructure, with a public roadmap and requests for comments (RFCs) on Authorization and Real-Time Patterns. Celest also maintains a GitHub repository for feature requests and support, provides comprehensive documentation for its CLI and functions, and hosts a Discord server for community interaction and feedback.