Best Databases & Backend APIs in 2026

Open-source Firebase alternative with PostgreSQL, auth, and storage.

Reactive backend with real-time queries and serverless functions.

Access MongoDB data via HTTPS endpoints without drivers.

Distributed document-relational database with native GraphQL.

NoSQL cloud database with real-time sync across clients.

Serverless Redis, Kafka, and QStash for edge applications.

Serverless PostgreSQL with branching, autoscaling, and instant provisioning.

Serverless MySQL platform with branching and non-blocking schema changes.

Managed vector database for AI similarity search and RAG.

Open-source vector database for semantic search and AI apps.