Question: Can you suggest a solution that provides a simple JavaScript API and supports GraphQL for real-time data subscriptions and notifications?

If you're looking for a solution that offers a simple JavaScript API and supports GraphQL for real-time data subscriptions and notifications, Supabase could be a great option. It's an open-source Firebase alternative that lets developers build production apps with a Postgres database, user authentication and real-time subscriptions. Supabase supports frameworks like Next.js and Svelte, and it offers a free tier with unlimited API requests, so it's good for projects of any size.

Another contender is Grafbase, a unified graph platform that lets developers assemble multiple data sources into a single graph. It's designed to publish GraphQL APIs and comes with a variety of tools to build and deploy modern apps. Grafbase supports frameworks like React and Vue, and it's priced on usage, starting with a free tier.

For a solution that focuses on real-time data synchronization, check out SingleStore. The platform lets you read, write and reason on petabyte-scale data sets in milliseconds. It supports multiple data models and features high-throughput streaming data ingestion and millisecond query performance, making it good for intelligent applications. SingleStore's pricing is based on usage, with a free tier and scalable plans for bigger projects.