MongoDB Atlas

mongodb.com · 4 records in Compute, Databases and KV, Storage · JSON

Records 4

caveatMongoDB Atlas (free cluster, formerly M0)
Databases and KVfree tieridentity emailno cardlimit per-ip-shapingevidence documentedstale on 2026-11-22
fails: identityMongoDB
Computefree tieridentity institutionno cardlimit write-gatedevidence documentedstale on 2026-11-22
fails: quotaMongoDB Atlas (M0 / Free cluster)
Storagefree tieridentity email?card?evidence reportedstale on 2026-11-05
fails: quotamongodb atlas free cluster (m0)
Storageidentity email?card?evidence reportedstale on 2026-11-05

MongoDB Atlas (free cluster, formerly M0)

Databases and KV

www.mongodb.com/docs/atlas/reference/free-shared-limitationsDocument databasedatabases-kv/mongodb-atlas-m0JSON compare report an error

Free allowance: 0.5 GB of data storage on a shared cluster with three-node replication, one free cluster per project, free forever
Verdict: caveatusable, with a named limit or an unprobed read path
Cost: free tier
Identity: emailno card, no phone
Binding limit: per-ip-shaping100 operations per second, enforced by throttling with a one-second cooldown
Evidence: documented2 sources; a first-party page was read and the sentence quoted
Freshness: stale on 2026-11-22checked 2026-10-22 (live); stale on 2026-11-22

Free tier	0.5 GB of data storage on a shared cluster with three-node replication, one free cluster per project, free forever unit GB; metered on stored-bytes
Price	none stated
Limits	per-ip-shaping (binding) 100 operations per second, enforced by throttling with a one-second cooldown source per-object-cap 0.5 GB of data storage; storage size is not configurable on a free cluster source request-rate 10 GB in and 10 GB out per rolling 7-day period source retention-clamped paused after 30 days with zero connections source 500 connections maximum; replication factor 3; no sharding, no network peering, and only a subset of regions
Identity	email an Atlas account; no card on Free
Egress	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 free allowance: 10 GB out per 7 days
Per-object cap	16 mebibytes per BSON document, which is the MongoDB engine limit and not a tier limit (16777216 bytes)
Retention	paused automatically after 30 days with zero connections; resumable unless the cluster ran a version Atlas can no longer restore to (30 days)
Interface	rest, cli 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
Composes with	a free document store that survives inactivity for a month, which is the longest idle clock in this class short of Aiven
Reliability	the page is explicit that Atlas may deactivate idle free clusters under its terms, and recommends exporting a copy before a long pause
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.
Evidence note	documented both pages were read: 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.
Parsed numbers	has-free-tier 1 per-object-cap 0.5 GB request-rate 10 GB

Evidence 2

date	source	what it proved
2026-10-22	www.mongodb.com/docs/atlas/reference/free-shared-limitations	'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'
2026-10-22	www.mongodb.com/docs/manual/reference/limits/	'The maximum BSON document size is 16 mebibytes', which is an engine limit and not an Atlas tier limit

MongoDB

Compute

www.mongodb.com/solutions/startupsManaged databasecompute/mongodbJSON compare report an error

Free allowance: Free MongoDB Atlas credits and Voyage AI tokens across four tiers: Inspire for bootstrapped startups, Grow for early-funded, Innovate for rising VC-backed, and Scale for rapidly scaling.
Verdict: fails: identitythe identity required is not reachable without it
Cost: free tier
Identity: institutionno card, no phone
Binding limit: write-gatedThe company-shaped application fails first, and the amount is undisclosed, so even a successful applicant cannot size the benefit before committing to the platform.
Evidence: documented2 sources; a first-party page was read and the sentence quoted
Freshness: stale on 2026-11-22checked 2026-10-22 (live); stale on 2026-11-22

Free tier	Free MongoDB Atlas credits and Voyage AI tokens across four tiers: Inspire for bootstrapped startups, Grow for early-funded, Innovate for rising VC-backed, and Scale for rapidly scaling. Base-tier eligibility: less than 7 years old, Series A or earlier, building a single software-based product, not previously accepted, with an active company website and LinkedIn profile. unit none; metered on wall-clock; one-shot-credit
Price	none stated
Limits	write-gated (binding) The company-shaped application fails first, and the amount is undisclosed, so even a successful applicant cannot size the benefit before committing to the platform. source
Identity	institution The base tier asks for a company less than seven years old at Series A or earlier with an active website and a LinkedIn profile, and refuses development shops and agencies. The credit value per tier is not published.
Egress	not stated
Interface	rest inferred from the tooling the provider documents; not probed
Tooling	not stated
Composes with	Atlas credits at the small-cluster scale are worth tens of dollars a month, so even the top tier is a small absolute benefit beside the compute credits in this class. It composes with a Databricks application, since the two programs overlap on Neon.
Reliability	no reliability event recorded
Notes	One partner landing page, cloud.google.com/mongodb/startups, states up to USD 5,000 in Atlas credits, which contradicts the program page's silence and may be a stale Google-specific co-offer. Recording null rather than either number; the vendor program page is the authority and it publishes none.
Parsed numbers	has-free-tier 1

Evidence 2

date	source	what it proved
2026-10-22	www.mongodb.com/solutions/startups	four tiers named Inspire, Grow, Innovate and Scale, each described by funding stage, with no dollar amount published, quoted
2026-10-22	www.mongodb.com/solutions/startups	base tier is 'Less than 7 years old and Series A or earlier', a single software product, an active company website and LinkedIn profile, quoted

More fields 1

facets	`{"class": "startup-credit","free_tier_kind": "one-shot-credit","shape": null}`

Unknown values 6

egress metered: egress metering was not published
egress terms: a source was read and is silent on this field
per object cap stated: the field does not apply to this kind of offer
reliability note: nothing of this kind was observed
retention stated: the field does not apply to this kind of offer
tooling: a source was read and is silent on this field

MongoDB Atlas (M0 / Free cluster)

Storage

www.mongodb.com/atlasPaaSstorage/mongodb-atlasJSON compare report an error

Free allowance: 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
Verdict: fails: quotathe free allowance is too small to matter
Cost: free tier
Identity: email?placeholder, not evidence; card unknown, phone unknown
Binding limit: noneno named constraint binds
Evidence: reported3 sources; a third party said so
Freshness: stale on 2026-11-05checked 2026-10-21 (inherited); stale on 2026-11-05

Free tier	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
Price	none stated
Identity	email (placeholder) not published
Egress	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.
Per-object cap	not stated
Retention	not stated
Interface	rest rest
Tooling	Standard MongoDB drivers (pymongo, motor), `mongosh`, Atlas Data API (HTTPS), `mongodump`/`mongorestore`; GridFS for files >16 MB via pymongo's gridfs
Composes with	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.
Reliability	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.
Parsed numbers	has-free-tier 1

Evidence 3

date	source	what it proved
2026-10-21	www.mongodb.com/pricing	'M0 \| 512 MB \| Shared \| Shared \| Free forever'
2026-10-21	www.mongodb.com/docs/atlas/reference/free-shared-limitations	'Free clusters: 0.5 GB ... all uncompressed BSON documents ... plus the bytes stored in their associated indexes'; 'only one Free cluster per project'
2026-10-21	www.mongodb.com/docs/atlas/reference/atlas-limits/	'Projects per Atlas User \| 250', 'Projects per Atlas Organization \| 250'

More fields 1

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"}`

Unknown values 4

per object cap notes: the field may be stated in a source that was not read
per object cap stated: the field may be stated in a source that was not read
retention notes: the field may be stated in a source that was not read
retention stated: the field may be stated in a source that was not read

mongodb atlas free cluster (m0)

Storage

www.mongodb.com/docs/atlas/reference/faq/storage/storage/mongodb-atlas-free-clusterJSON compare report an error

Free allowance: Hard 512 MB, not configurable: 'you are over your space quota, using 513 MB of 512 MB'..
Verdict: fails: quotathe free allowance is too small to matter
Cost: not stated
Identity: email?placeholder, not evidence; card unknown, phone unknown
Binding limit: noneno named constraint binds
Evidence: reported1 source; a third party said so
Freshness: stale on 2026-11-05checked 2026-10-21 (inherited); stale on 2026-11-05

Free tier	Hard 512 MB, not configurable: 'you are over your space quota, using 513 MB of 512 MB'.. unit none; metered on none
Price	none stated
Identity	email (placeholder) not published
Egress	not recorded
Interface	unknown
Tooling	not recorded

Evidence 1

date	source	what it proved
2026-10-21	www.mongodb.com/docs/atlas/reference/faq/storage/	the text of Free tier, above

More fields 1

dead end	`{"failure_class": "quota","why": "Hard 512 MB, not configurable: 'you are over your space quota, using 513 MB of 512 MB'..","retry_when": null,"first_recorded": "2026-10-21"}`

Unknown values 7

chaining: no value was recorded for this field
egress terms: no value was recorded for this field
interface: the access interface was not established
per object cap notes: no value was recorded for this field
per object cap stated: no value was recorded for this field
retention stated: no value was recorded for this field
tooling: no value was recorded for this field