MongoDB Atlas
Free M0 cluster.
Database
What you get
Free forever cluster with 512 MB storage, shared RAM and vCPU.
How to get it
Sign up at mongodb.com/atlas.
What it requires
Not stated by vendor
The catch
Meant for learning and exploring; 512 MB cap.
From the official page ยท checked 2026-10-14
Other Database tools (6)
| Firebase | Daily quotas | |
| Neon | Compute and storage caps | Card: none |
| Pinecone | Storage caps | |
| Supabase | 500 MB database, 5 GB egress, 2 active projects; paused after 1 week inactive | |
| Turso | Storage/row-read caps | Card: none |
| Upstash | Command limits |