Directus vs Firebase
Pricing
Directus: Free self-hosted, cloud from $15/mo
Firebase: Free Spark plan, pay as you go on Blaze
Description
Directus: Open-source headless CMS and backend-as-a-service that wraps any SQL database with a REST and GraphQL API
Firebase: Google's app platform with a NoSQL database, authentication, hosting, cloud functions, storage and push messaging, plus SDKs for web and mobile
Pros
- Works with existing SQL databases without migration
- Visual admin panel for non-technical content management
- Self-hostable for free under MIT license
- The Spark plan needs no payment method and includes 1 GiB of Firestore storage and 50,000 document reads a day
- SDKs for Apple platforms, Android, the web, Flutter, Unity and C++
- Authentication is free up to 50,000 monthly active users
Cons
- Revenue threshold requires a paid license for self-hosted (over $5M/yr)
- More CMS-oriented, less suited for complex application logic
- Cloud Functions and Cloud Storage need the pay-as-you-go Blaze plan
- Firestore is a NoSQL document database, not a relational SQL database like the Postgres behind Supabase
- Budget alerts only send email; a hard spending cap exists for just a few services, such as Cloud Functions and App Hosting
Details
Directus is an open-source data platform that layers a real-time API and intuitive admin app on top of any SQL database. It supports REST and GraphQL out of the box, with granular role-based access control and built-in file storage. Ideal for solo founders who need a content backend with a visual dashboard, or who want to expose an existing database as an API without rewriting anything.
Firebase bundles the backend pieces an app needs: Cloud Firestore and the Realtime Database, Authentication, Hosting, Cloud Functions, Cloud Storage, Cloud Messaging for push notifications and Crashlytics. The client SDKs talk to these services directly, guarded by security rules, so many apps need no server of their own.
It suits founders building mobile apps or prototypes on Google’s infrastructure. Firebase Authentication, its sign-in service, can also be used without the rest of Firebase.
Spark is free and covers a side project. Once you need functions or file storage you move to Blaze, which keeps the same free allowances and bills the usage beyond them. Set a budget when you upgrade, and know that it only warns you by email: services keep running unless you add a spend cap where one is available.
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