{"rid":"databases-kv/mongodb-atlas-m0","card":{"rid":"databases-kv/mongodb-atlas-m0","eid":"mongodb","topic":"databases-kv","slug":"mongodb-atlas-m0","provider":"MongoDB Atlas (free cluster, formerly M0)","url":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/","domain":"mongodb.com","category":"document database","tier":null,"verdict":"qualifies-with-caveat","vorder":1,"grp":"usable","confidence":"documented","binding":"per-ip-shaping","identity_kind":"email","identity_basis":"stated","needs_card":0,"needs_phone":0,"needs_id":0,"needs_institution":0,"country":null,"crypto":null,"interfaces":"rest,cli","egress_metered":1,"per_object_bytes":16777216,"retention_days":30,"verified_at":"2026-10-22T03:05:00.000Z","verified_basis":"live","checked_on":"2026-10-23","stale_on":"2026-11-22","n_evidence":2,"usd_month":null,"usd_per_tb_month":null,"summary":"0.5 GB of data storage on a shared cluster with three-node replication, one free cluster per project, free forever","duplicate_of":null,"n_unknown":1},"record":{"topic":"databases-kv","slug":"mongodb-atlas-m0","provider":"MongoDB Atlas (free cluster, formerly M0)","url":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/","category":"document database","free_tier":{"stated":"0.5 GB of data storage on a shared cluster with three-node replication, one free cluster per project, free forever","unit":"GB","source_url":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/","read_on":"2026-10-22","metered_on":"stored-bytes"},"per_object_cap":{"stated":"16 mebibytes per BSON document, which is the MongoDB engine limit and not a tier limit","bytes":16777216,"source_url":"https://www.mongodb.com/docs/manual/reference/limits/"},"retention":{"stated":"paused automatically after 30 days with zero connections; resumable unless the cluster ran a version Atlas can no longer restore to","days":30,"source_url":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/"},"egress":{"terms":"10 GB in and 10 GB out per rolling seven-day period; exceeding it throttles the cluster and adds a one-second cooldown per connection","metered":true,"free_allowance":"10 GB out per 7 days","price_per_tb":null,"source_url":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/"},"interface":["rest","cli"],"interface_detail":"the MongoDB wire protocol; a Data API for HTTPS access; the Atlas Administration API and the atlas CLI","tooling":"mongosh, any MongoDB driver, the atlas CLI","chaining":"a free document store that survives inactivity for a month, which is the longest idle clock in this class short of Aiven","limits":[{"kind":"per-ip-shaping","value":"100 operations per second, enforced by throttling with a one-second cooldown","source":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/"},{"kind":"per-object-cap","value":"0.5 GB of data storage; storage size is not configurable on a free cluster","source":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/"},{"kind":"request-rate","value":"10 GB in and 10 GB out per rolling 7-day period","source":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/"},{"kind":"retention-clamped","value":"paused after 30 days with zero connections","source":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/"}],"limits_note":"500 connections maximum; replication factor 3; no sharding, no network peering, and only a subset of regions","binding":"per-ip-shaping","identity_cost":{"kind":"email","detail":"an Atlas account; no card on Free","country":null},"reliability_note":"the page is explicit that Atlas may deactivate idle free clusters under its terms, and recommends exporting a copy before a long pause","confidence":"documented","confidence_note":"both pages were read today: the Atlas free-tier limits page for the 0.5 GB, the pause and the throttles, and the server limits page for the 16 mebibyte document cap. the page states 0.5 GB.","evidence":[{"url":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/","date":"2026-10-22","proved":"'Free clusters: 0.5 GB' for Data Storage; 'Atlas automatically pauses Free clusters after 30 days of inactivity where there are zero connections'; 10 GB in and out per rolling seven-day period; 100 operations per second; 500 connections; 'You can't configure storage size for Free clusters'"},{"url":"https://www.mongodb.com/docs/manual/reference/limits/","date":"2026-10-22","proved":"'The maximum BSON document size is 16 mebibytes', which is an engine limit and not an Atlas tier limit"}],"verdict":"qualifies-with-caveat","verified_at":"2026-10-22T03:05:00.000Z","price_per_tb_month":null,"notes":"0.5 GB is a hard wall rather than an overage, and 100 ops/s is a throughput cap that no storage allowance can exceed. The 30-day idle clock is the most forgiving in this class and it is still a clock."},"claims":[{"path":"$.free_tier.stated","kind":"free-quota","num":0.5,"unit":"GB","per":null,"currency":null,"usd":null,"fx_date":null,"parse":"ok"},{"path":"$.limits[0].value","kind":"limit:per-ip-shaping","num":null,"unit":null,"per":null,"currency":null,"usd":null,"fx_date":null,"parse":"unparsed"},{"path":"$.limits[1].value","kind":"limit:per-object-cap","num":0.5,"unit":"GB","per":null,"currency":null,"usd":null,"fx_date":null,"parse":"ok"},{"path":"$.limits[2].value","kind":"limit:request-rate","num":10,"unit":"GB","per":null,"currency":null,"usd":null,"fx_date":null,"parse":"ok"},{"path":"$.limits[3].value","kind":"limit:retention-clamped","num":null,"unit":null,"per":null,"currency":null,"usd":null,"fx_date":null,"parse":"unparsed"}],"unknown":[["$.confidence_note","partly-held"]],"history":[],"drift":[]}