fshy / Compute / Databases and KV / Storage

MongoDB Atlas

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

MongoDB Atlas (free cluster, formerly M0) Databases and KVcaveatemailno cardDper-ip-shaping
MongoDB Computefails: identityinstitutionno cardDwrite-gated
MongoDB Atlas (M0 / Free cluster) Storagefails: quotaemail?card?R
mongodb atlas free cluster (m0) Storagefails: quotaemail?card?R

MongoDB Atlas (free cluster, formerly M0) Databases and KV

caveatemailno cardDper-ip-shaping

www.mongodb.com/docs/atlas/reference/free-shared-limitations · document database · databases-kv/mongodb-atlas-m0 · JSON · compare

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
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)
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
Identity	email an Atlas account; no card on Free
Limits	per-ip-shaping 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
Binding	per-ip-shaping
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 rung	documented 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.
Checked	2026-10-23 (live); stale on 2026-11-22
Parsed numbers	`$.limits[1].value` limit:per-object-cap 0.5 GB `$.limits[2].value` limit:request-rate 10.0 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

Unknown or withheld values (1)

$.confidence_note partly-held

MongoDB Compute

fails: identityinstitutionno cardDwrite-gated

www.mongodb.com/solutions/startups · managed database · compute/mongodb · JSON · compare

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
Per-object cap	not applicable
Retention	not applicable
Egress	not stated
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.
Limits	write-gated 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 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.
Binding	write-gated 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.
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.
Evidence rung	documented
Checked	2026-10-22 (live); stale on 2026-11-21

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)

{
 "wave2": {
  "class": "startup-credit",
  "free_tier_kind": "one-shot-credit",
  "shape": null
 }
}

Unknown or withheld values (8)

$.egress.metered egress-unknown
$.egress.terms not-stated
$.per_object_cap.notes process
$.per_object_cap.stated not-applicable
$.reliability_note none-observed
$.retention.notes process
$.retention.stated not-applicable
$.tooling not-stated

MongoDB Atlas (M0 / Free cluster) Storage

fails: quotaemail?card?R

www.mongodb.com/atlas · paas · storage/mongodb-atlas · JSON · compare

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
Per-object cap	not stated
Retention	not stated
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.
Identity	email (placeholder) not published
Binding	none no constraint of a named kind was recorded; the verdict rests on the quota sentence rather than on a named limit
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.
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
Evidence rung	reported One page read moves it to documented.
Checked	2026-10-21 (inherited); stale on 2026-11-04

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 or withheld values (8)

$.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

mongodb atlas free cluster (m0) Storage

fails: quotaemail?card?R

www.mongodb.com/docs/atlas/reference/faq/storage/ · rejected-provider · storage/mongodb-atlas-free-cluster · JSON · compare

Free tier	Hard 512 MB, not configurable: 'you are over your space quota, using 513 MB of 512 MB'. Three orders of magnitude short. unit none; metered on none
Price	none stated
Per-object cap	not recorded
Retention	not recorded
Egress	not recorded
Identity	email (placeholder) not published
Binding	none no constraint of a named kind was recorded; the verdict rests on the quota sentence rather than on a named limit
Interface	unknown
Tooling	not recorded
Composes with	not recorded
Reliability	Hard 512 MB, not configurable: 'you are over your space quota, using 513 MB of 512 MB'. Three orders of magnitude short.
Notes	Hard 512 MB, not configurable: 'you are over your space quota, using 513 MB of 512 MB'. Three orders of magnitude short.
Evidence rung	reported
Checked	2026-10-21 (inherited); stale on 2026-11-04

Evidence (1)

date	source	what it proved
2026-10-21	www.mongodb.com/docs/atlas/reference/faq/storage/	Hard 512 MB, not configurable: 'you are over your space quota, using 513 MB of 512 MB'. Three orders of magnitude short.

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'. Three orders of magnitude short.",
  "retry_when": null,
  "first_recorded": "2026-10-21"
 }
}

Unknown or withheld values (15)

$.chaining not-recorded
$.confidence_note withheld
$.egress.terms not-recorded
$.extras.dead_end.retry_when process
$.free_tier.notes process
$.identity_cost.detail defaulted
$.identity_cost.kind identity-defaulted
$.interface interface-unknown
$.interface_detail withheld
$.limits_note process
$.per_object_cap.notes not-recorded
$.per_object_cap.stated not-recorded
$.retention.notes process
$.retention.stated not-recorded
$.tooling not-recorded