{"rid":"storage/mongodb-atlas","card":{"rid":"storage/mongodb-atlas","eid":"mongodb","topic":"storage","slug":"mongodb-atlas","provider":"MongoDB Atlas (M0 / Free cluster)","url":"https://www.mongodb.com/atlas","domain":"mongodb.com","category":"paas","tier":null,"verdict":"fails-quota","vorder":6,"grp":"rejected","confidence":"reported","binding":"none","identity_kind":"email","identity_basis":"defaulted","needs_card":null,"needs_phone":null,"needs_id":null,"needs_institution":null,"country":null,"crypto":null,"interfaces":"rest","egress_metered":0,"per_object_bytes":null,"retention_days":null,"verified_at":"2026-10-21T00:00:00.000Z","verified_basis":"inherited","checked_on":"2026-10-21","stale_on":"2026-11-04","n_evidence":3,"usd_month":null,"usd_per_tb_month":null,"summary":"512 MB data storage per free cluster (0.5 GB, uncompressed BSON + indexes); one free cluster per project; 250 projects per Atlas user and 250 per organization","duplicate_of":null,"n_unknown":8},"record":{"topic":"storage","slug":"mongodb-atlas","provider":"MongoDB Atlas (M0 / Free cluster)","url":"https://www.mongodb.com/atlas","category":"paas","free_tier":{"stated":"512 MB data storage per free cluster (0.5 GB, uncompressed BSON + indexes); one free cluster per project; 250 projects per Atlas user and 250 per organization","unit":"objects","metered_on":"stored-bytes","source_url":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/","read_on":"2026-10-21","notes":null},"per_object_cap":{"stated":"not stated","source_url":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/","notes":"not stated"},"retention":{"stated":"not stated","source_url":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/","notes":"not stated"},"egress":{"terms":"Data transfer out is not the metered axis on M0 — there is no published egress allowance or overage for Free clusters; the limits that bite are 500 connections and 100 ops/sec. Effectively unmetered for read volume, which makes M0 unusual in this class.","metered":false},"interface":["rest"],"interface_detail":"rest","tooling":"Standard MongoDB drivers (pymongo, motor), `mongosh`, Atlas Data API (HTTPS), `mongodump`/`mongorestore`; GridFS for files >16 MB via pymongo's gridfs","chaining":"250 projects per user x 1 free cluster each x 512 MB = ~128 GB per Atlas account, and 250 organizations per user gives another axis. GridFS chunks (255 KB default) mean no practical per-object cap beyond the 512 MB total.","limits":[],"limits_note":"512 MB total is tiny per unit — the whole value is the 250x multiplier. 100 ops/sec, 500 connections, no sharding, no configurable storage. Cluster creation is heavily rate-limited in practice (one free cluster per project, project creation itself throttled).","identity_cost":{"kind":"email","detail":null,"country":null},"reliability_note":"Free clusters are shared and throttle at 100 ops/sec; a bulk-write workload will be visibly slow rather than failing. Data is 3-node replicated, no vanishing.","confidence":"reported","confidence_note":"One page read moves it to documented.","evidence":[{"url":"https://www.mongodb.com/pricing","date":"2026-10-21","proved":"'M0 | 512 MB | Shared | Shared | Free forever'"},{"url":"https://www.mongodb.com/docs/atlas/reference/free-shared-limitations/","date":"2026-10-21","proved":"'Free clusters: 0.5 GB ... all uncompressed BSON documents ... plus the bytes stored in their associated indexes'; 'only one Free cluster per project'"},{"url":"https://www.mongodb.com/docs/atlas/reference/atlas-limits/","date":"2026-10-21","proved":"'Projects per Atlas User | 250', 'Projects per Atlas Organization | 250'"}],"verdict":"fails-quota","verified_at":"2026-10-21T00:00:00.000Z","notes":"512 MB data storage per free cluster (0.5 GB, uncompressed BSON + indexes); one free cluster per project; 250 projects per Atlas user and 250 per organization","extras":{"dead_end":{"failure_class":"quota","why":"512 MB data storage per free cluster (0.5 GB, uncompressed BSON + indexes); one free cluster per project; 250 projects per Atlas user and 250 per organization","retry_when":null,"first_recorded":"2026-10-21"}},"binding":"none","binding_note":"no constraint of a named kind was recorded; the verdict rests on the quota sentence rather than on a named limit"},"claims":[{"path":"$.free_tier.stated","kind":"free-quota","num":512,"unit":"MB","per":null,"currency":null,"usd":null,"fx_date":null,"parse":"ok"}],"unknown":[["$.extras.dead_end.retry_when","process"],["$.free_tier.notes","process"],["$.identity_cost.detail","defaulted"],["$.identity_cost.kind","identity-defaulted"],["$.per_object_cap.notes","not-extracted"],["$.per_object_cap.stated","not-extracted"],["$.retention.notes","not-extracted"],["$.retention.stated","not-extracted"]],"history":[],"drift":[]}