Migrate from Firebase to AWS

Outgrow Firebase's limitations with AWS infrastructure that scales predictably and gives you full control over your backend.

Migration: Firebase to AWS

From Firebase to AWS

Why Migrate

  • Predictable Costs at Scale: Firebase costs can spike unpredictably with usage. AWS offers reserved capacity, savings plans, and granular cost controls for predictable budgets.
  • Relational Database Support: Move beyond Firestore's NoSQL limitations to RDS/Aurora with full SQL support, joins, transactions, and mature indexing strategies.
  • Enterprise Services: Access VPC networking, IAM policies, compliance certifications, and 200+ managed services that Firebase simply does not offer.

Migration Roadmap

  1. Firebase Audit (1–2 weeks): Catalog all Firebase services in use — Firestore, Auth, Cloud Functions, Storage, Hosting — and map each to AWS equivalents.
    • Firebase service inventory
    • AWS service mapping document
    • Cost comparison analysis
  2. Backend Migration (3–6 weeks): Migrate Cloud Functions to Lambda, Firestore to DynamoDB or RDS, Firebase Auth to Cognito, and Storage to S3.
    • Lambda functions with API Gateway
    • Database migration with data validation
    • Cognito user pool with migrated users
  3. Frontend Update & Cutover (1–2 weeks): Update frontend SDKs from Firebase to AWS Amplify or custom clients, test end-to-end, and switch production traffic.
    • Updated frontend with AWS SDK integration
    • End-to-end test results
    • Production cutover with rollback plan

Risks & Mitigation

  • Firebase Auth user passwords cannot be exported: We use Cognito's custom migration Lambda to transparently migrate users on their next login, requiring no password resets.
  • Firestore's real-time sync is hard to replicate: We implement WebSocket connections via API Gateway or AppSync to provide real-time data sync comparable to Firestore's listener model.

Estimated Scope

Hours: 120–240 | Cost: $240–$480 | Timeline: 5–10 weeks

Frequently Asked Questions

Will users need to reset their passwords?
No. We use Cognito's migration trigger to seamlessly verify credentials against Firebase Auth on first login, then store the user in Cognito going forward.
Can we keep Firebase for some features?
Yes. A phased migration is common. You might keep Firebase push notifications while migrating the database and auth first.
How do we replace Firestore real-time listeners?
We use AWS AppSync with GraphQL subscriptions or API Gateway WebSockets to deliver real-time data updates with the same developer experience.