
Firebase
Google's app backend: Firestore database, Auth and Hosting on the no-cost Spark plan with no payment method. Cloud Storage and Functions need the pay-as-you-go Blaze plan.

Postmark
Transactional email service known for fast, reliable delivery: test free with 100 emails a month, no card needed.

Resend
Free email API for developers: send 3,000 transactional emails a month from your app, with SMTP, SDKs and React Email.

Supabase
Free Postgres backend with auth for 50,000 monthly users, 500 MB database and 1 GB storage.

Google for Startups Cloud Program
$2,000 Google Cloud credits plus 12 months of Workspace Business Plus for pre-funded startups.

AWS Activate
$1,000 in AWS credits for self-funded startups, with up to $5,000 for select participants.