The free cluster runs on shared hardware and has no backups. MongoDB Atlas is the managed cloud version of MongoDB. The pricing page says the free tier includes 512 MB of storage, 32 MB of sort memory and up to 100 operations per second on shared RAM and vCPU, runs on AWS, Google Cloud or Azure, and has no backup service. Dedicated clusters are priced from $56.94 a month on the page text I read. Forum threads describe the practical limits of the free M0 cluster: a rolling seven-day data transfer cap, one M0 cluster per project, no way back to M0 once you upgrade, and shared-hardware slowness. G2 lists 906 reviews for Atlas, where one reviewer called the free tier enough for a small user base and others flagged cost and billing complexity.
Free tier quotas
Storage
512 MB
Throughput
Up to 100 operations per second
Sort memory
32 MB
Compute
Shared RAM and shared vCPU
Cloud providers
AWS, Google Cloud and Azure
Backups
Backup services are not available on the free tier
Data transfer
Reddit commenters report a rolling seven-day cap on data in and out of M0 clusters
Clusters
A commenter says you cannot have more than one M0 cluster, and cannot return to M0 after upgrading
Last sniffed Oct 9, 2026. Always confirm on the official pricing page.
👍 Good boy
+The free cluster runs on AWS, Google Cloud or Azure, so you can pick the provider you already use.
+A G2 reviewer said the free tier covered everything they needed for a small user base and that the schemaless model made it easy to change their data structure as the project evolved.
+G2 lists 906 reviews for Atlas, and across MongoDB's G2 reviews about 73% are five-star and 22% four-star.
+A commenter in an r/mongodb thread said an M0 cluster is a three-node replica set.
+Atlas runs on all three major clouds, so the data can sit next to the rest of your stack.
+A G2 discussion thread on pricing for small teams says reviewers find it cost-effective at small scale.
👎 Watch out
−The free tier has no backup service, per the pricing page.
−Compute is shared. An r/mongodb thread notes that the shared free tier can slow down, which fits the shared RAM and vCPU on the pricing page.
−Commenters describe a data transfer cap measured over a rolling seven days. A poster in an older thread hit a 10 GB seven-day limit within three days even though the database was only 2 MB.
−A commenter says you cannot hold more than one M0 cluster and cannot downgrade back to M0 once you move to a paid tier.
−Throughput is capped at 100 operations per second, and older threads cite connection limits (one said 100, another 500), so check the current limits page.
−G2's pros and cons summary lists cost as a complaint, citing high costs and complex billing. Dedicated clusters start at $56.94 a month on the pricing text I read.
The catch
The free cluster is for learning and prototypes. It has 512 MB of storage, shared compute, up to 100 operations per second and no backups. Reddit threads add practical limits: a rolling seven-day data transfer cap, one M0 cluster per project, and no way to downgrade to M0 after upgrading.
Performance varies because the hardware is shared. One thread says the shared free tier can slow down, while another says M0 is a three-node replica set. Both can be true.
Dedicated clusters start at $56.94 a month on the page text I read (tier name not captured), and G2's cons mention high costs and billing complexity. I could not confirm whether the free cluster needs a card or what commercial terms apply.
What’s included
✓Document database
✓Shared free cluster (M0)
✓AWS, Google Cloud and Azure
✓Dedicated clusters from $56.94 a month
✓32 MB of sort memory on the free tier
✓Hourly pricing on larger dedicated tiers
Free tier value
Generosity
B
Estimated value
A free 512 MB shared MongoDB cluster
Feature parity
Dedicated clusters start at $56.94 a month. Backups are not part of the free tier.
Screenshots
HomepagePricing page
Paid plans
Dedicated, from $56.94 a month
The pricing page shows dedicated clusters starting at $56.94 a month. The tier name was not captured, so check the page for the exact specs.
Larger dedicated tiers
Priced per hour. The page lists an S70 example at $2.50 an hour.
Common questions
How big is the MongoDB Atlas free cluster?
512 MB of storage with shared RAM and vCPU, 32 MB of sort memory and up to 100 operations per second.
Does the free tier include backups?
No. The pricing page says backup services are not available for the Free tier.
Can I use the free tier in production?
Threads split. One commenter said M0 is a three-node replica set, while another thread notes the shared service can slow down. Treat it as a prototype tier.
Is there a data transfer limit?
Reddit commenters report a rolling seven-day limit on data in and out of M0 clusters. Check the current limits page.
What do reviewers complain about?
G2's summary lists high costs and complex billing.
Change history
Checked October 22, 2026
Pricing page read. G2 review counts and themes from search excerpts. Reddit threads read as excerpts, several older. Card requirement and commercial terms not confirmed.
