Fully managed PostgreSQL database with a free tier including 500MB storage.

Railway is a cloud platform offering a variety of services including databases, with a focus on usage-based pricing to optimize costs. It provides flexible plans for developers and teams, allowing them to pay only for the resources they use.

EdgeDB is a next-generation database that combines the best of SQL and GraphQL, offering a strictly typed, declarative schema with built-in migrations and based on PostgreSQL.

Fully managed, cost-effective relational database service for PostgreSQL, MySQL, and SQL Server with a free plan for personal projects and small-scale deployments.

Xata is a serverless data platform built on top of Postgres, offering a fully managed, high-availability database service with features like auto-scaling, zero-downtime branching, and data anonymization. It provides a simple, transparent pricing model with pay-as-you-go options for compute and storage, and offers a free tier with 15 GB of storage.

Distributed SQL database designed for resilience and scalability, offers a free tier suitable for smaller projects.

FaunaDB is a transactional and developer-friendly database delivered to users as a secure web-native API. It offers freedom from issues related to database provisioning, sharing, replication, maintenance, scaling, or correctness. FaunaDB supports relations, documents, and graphs for unmatched modeling flexibility, and features real-time streaming and GraphQL support. It is configuration-free, provisioning-free, and available instantly as a serverless utility.

PlanetScale offers serverless MySQL and Postgres databases with a free tier up to 10GB storage. It provides high-availability clusters, autoscaling storage, and unlimited IOPS. Ideal for developers and enterprises needing scalable database solutions.

Globally Distributed Database

TiDB Cloud is a unified distributed SQL database that combines HTAP (Hybrid Transactional/Analytical Processing), vector search, and ACID transactions. It is designed for production AI agents and multi-agent systems, offering horizontal scalability and strong multi-tenant isolation.

Managed TursoSQL database with a free tier for lightweight use.

TiDB Cloud Starter is a fully managed, multi-tenant TiDB offering. It delivers an instant, autoscaling MySQL-compatible database and offers a generous free quota and consumption based billing once free limits are exceeded. The free plan is ideal for those who are getting started with TiDB Cloud Starter. It provides developers and small teams with the following essential features: No cost: This plan is free when usage is within the free quota. No credit card is required to get started. Storage: Provides an initial 5 GiB of row-based storage and 5 GiB of columnar storage. Request Units: Includes 50 million Request Units (RUs) for database operations.

InfluxDB Cloud offers a range of plans from free to dedicated, providing scalable and secure time series data storage and analytics.

Aiven provides an all-inclusive and transparent platform to stream, store, and serve data on any cloud. It offers a variety of services including Apache Kafka, PostgreSQL, MySQL, and more, with seamless integration and high availability.

Managed PostgreSQL, offers a hobby tier suitable for experimentation.

Parse open-source BaaS on the Cloud, offers a free tier.

The easiest, most advanced managed Memcache with free tier and reasonable pricing.

Real-time Data Platform

Serverless PostgreSQL with a free tier up to 3GB storage.

Managed document database based on Apache CouchDB

Microsoft's globally distributed, multi-model database service with a free tier.

Managed serverless Redis with global low latency and multi-region replication. Offers generous free plans and flexible pricing options.

NoSQL document database with a free tier for limited usage.

Fully managed Redis database service with a free plan for personal projects and small-scale deployments.

Astra DB is a fully managed, cloud-native vector database service built on Apache Cassandra®. It offers vector search capabilities essential for AI applications with 20% higher relevance and 74x faster responses. The service provides a serverless experience with flexible scaling and pay-as-you-go pricing. Free tier available.

Managed NoSQL database with a free tier up to 512MB.

Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. It offers both on-demand and provisioned capacity modes, allowing users to choose the best pricing option for their workload.

Managed PostgreSQL integrated with Vercel, free tier for small projects.

Offers managed databases like PostgreSQL, MySQL, and Redis. Relatively affordable options.