Firebase
Still the fastest way to bolt authentication and a real-time database onto a mobile or web app, but the newer requirement to link a billing account even on the free tier is a real friction point for a small team just testing an idea.
What it does
Firebase is Google's app development platform: authentication, a real-time NoSQL database (Firestore), file storage, hosting, analytics, and serverless functions, all designed to work together and to scale automatically. It's especially common in mobile app development, where its SDKs handle a lot of the plumbing for iOS and Android apps. For marketing-adjacent use, Firebase shows up most often behind mobile apps, waitlists, or interactive tools a technical team builds for a campaign or product launch.
Who this helps
You build mobile or web apps and want a ready-made backend.
You want authentication, a real-time database, storage, and hosting that work together.
You want a backend that scales automatically.
You build for iOS and Android and want SDKs that handle the plumbing.
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