Cloudflare D1

Cloudflare D1 is a serverless SQL database built on SQLite and native to the Cloudflare Workers platform. It gives edge applications a real relational database that lives on Cloudflare's global network, so a Worker can query structured data close to the user without managing a database server. Queries use standard SQLite SQL, and the database is accessed through a Workers binding rather than a connection string, which means D1 is used from within the Cloudflare developer ecosystem rather than as a standalone endpoint.

It is designed for globally distributed reads. Read replication places copies near users for low-latency reads while writes go to a primary, and the Sessions API helps maintain read-your-writes consistency across requests. Individual databases are capped at 10 GB, which nudges architectures toward many smaller databases, a natural fit for per-tenant designs where each customer or project gets its own database.

D1 pairs well with edge-friendly ORMs such as Drizzle and Prisma and complements the rest of Cloudflare's storage lineup (KV, R2, Durable Objects). Pricing follows a usage model based on rows read and written plus storage, with a generous free tier included on the Workers Free plan and higher limits on Workers Paid. Because it is tied to Workers, D1 is most compelling for teams already building on Cloudflare.