How Modal powered 250,000 Lovable app creations in a weekend

Lovable, a no-code application-generation startup that reached $75 million in annual recurring revenue within seven months, uses AI to create, run, and visually edit applications from user prompts. Ahead of a June 2025 promotional event expected to sharply increase traffic, the company sought an alternative to its existing sandbox provider because of concerns about scalability, reliability, and dependence on a single vendor. After considering an in-house AWS and Kubernetes solution, Lovable adopted Modal Sandboxes, reducing its sandbox orchestration code from roughly 15,000 lines to 700 and using encrypted networking tunnels for application communication. During the event, concurrent usage increased 2.5 to threefold, with Modal operating more than one million sandboxes and reaching 20,000 concurrent sandboxes while supporting an estimated 250,000 app creations in 48 hours without requiring platform-team intervention. Lovable now relies on Modal for every application-generation session and plans to explore features such as snapshotting to further improve performance.

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