Free database, vector & storage APIs (2026)

Free tier: Free plan: unlimited API requests, 50,000 MAU (auth), 500 MB database, shared CPU/500 MB RAM, 5 GB egress, 5 GB cached egress, 1 GB file storage; paused after 1 week inactivity; 2 active projects.

• Auth: anon/publishable key + service key; JWT
• Serving public users: Yes.
• Note: Also covers Auth, Storage, Edge Functions.
• Source: supabase.com

Free tier: Free plan, no time limit, no card: 100 projects, 100 CU-hours/month per project, 1 GB storage per project, autoscaling up to 2 CU (8 GB RAM); Neon Auth up to 60k MAU.

• Auth: Postgres connection string / API key
• Serving public users: Yes.
• Source: neon.com

Free tier: Free $0/month: 100 databases, 5 GB storage, 500 million monthly rows read, 10 million monthly rows written, 3 GB monthly syncs, 1 day point-in-time restore.

• Auth: Database auth token
• Serving public users: Yes.
• Source: turso.tech

Free tier: Free: 250 MB data, 10 GB monthly bandwidth, 500K monthly commands.

• Auth: REST token (Bearer) / Redis password
• Serving public users: Yes.
• Note: Good for per-IP rate limiting of an AI proxy.
• Source: upstash.com

Free tier: M0 cluster "Free forever": 512 MB storage, shared RAM/vCPU.

• Auth: Connection string; Atlas Data/Admin API keys
• Serving public users: Yes (learning/exploration positioning).
• Source: www.mongodb.com

Free tier: Starter plan free: up to 2 GB storage, up to 2M write units/month, up to 1M read units/month (plus inference allowances).

• Auth: API key (Api-Key header)
• Serving public users: Yes (small apps).
• Source: www.pinecone.io

Free tier: Free tier "free forever": single-node cluster 0.5 vCPU / 1 GB RAM / 4 GB disk; free cloud inference with selected models.

• Auth: API key (api-key header)
• Serving public users: Yes (testing/prototypes positioning).
• Source: qdrant.tech

Free tier: No-cost Spark plan, no payment method: Firestore 1 GiB stored, 50K document reads/day (more quotas on page); Authentication up to 50K MAU (SAML/OIDC 50 MAU).

• Auth: Firebase config + service account
• Serving public users: Yes.
• Source: firebase.google.com

Free tier: Free & Starter: $0/month (then pay as you go), 1-6 developers; 1M function calls included, 0.5 GB database storage, 20 GB-hours action compute; file storage, text + vector search, crons, auth.

• Auth: Deploy key / client URL
• Serving public users: Yes.
• Source: www.convex.dev

Free tier: Workers Free: 5 million rows read/day, 100,000 rows written/day, 5 GB total storage.

• Auth: Workers binding / API token
• Serving public users: Yes.
• Source: developers.cloudflare.com

Free tier: Free each month: 10 GB-month storage, 1 million Class A ops, 10 million Class B ops; egress free. Standard storage only.

• Auth: S3 access keys / API token
• Serving public users: Yes.
• Source: developers.cloudflare.com

Free tier: $0/month app: 2 GB storage (shared across apps), unlimited uploads and downloads, 7 days audit log retention.

• Auth: API key / token
• Serving public users: Yes.
• Source: uploadthing.com