Amazon DynamoDB (Storage)

Free allowance: 25 GB of storage, always free (does not expire), plus 25 WCU and 25 RCU provisioned capacity and ~200M requests/month
Verdict: fails: egressdata cannot be read back out at a usable rate or price
Cost: free tier
Identity: card?placeholder, not evidence; card unknown, phone unknown
Binding limit: noneno named constraint binds
Evidence: reported6 sources; a third party said so
Freshness: stale on 2026-11-05checked 2026-10-21 (inherited); stale on 2026-11-05

Free tier	25 GB of storage, always free (does not expire), plus 25 WCU and 25 RCU provisioned capacity and ~200M requests/month unit GB; metered on stored-bytes
Price	none stated
Identity	card (placeholder) inferred from the category 'iaas'; the source record states no identity cost, so this is a class assumption, not evidence
Egress	Metered — AWS gives 100 GB/month of data transfer out free, aggregated across all AWS services. 100 GB/month = ~3.3 GB/day vs 500 GB/day: 150x short. Beyond that, standard internet DTO rates. free allowance: 100 GB per month
Per-object cap	not stated
Retention	not stated
Interface	rest, cli rest
Tooling	AWS SDKs (boto3 etc.), `aws dynamodb` CLI, PartiQL; native `Binary` attribute type (raw bytes, base64 on the wire only); DynamoDB Streams + Lambda for processing
Composes with	25 GB per account per region, and the docs confirm 'the first 25 GB of storage are included in the AWS Free Tier in each AWS Region' — so N regions x 25 GB. 20 regions = 500 GB in principle, all under one account. This is the single largest structured-store byte allowance found. But the 25 RCU cap is region-global per table, so serving is throttled regardless.
Reliability	The catch is throughput: 25 RCU is 25 strongly-consistent 4 KB reads/sec, which is a hard ceiling no amount of sharding within the free tier escapes.
Parsed numbers	has-free-tier 1

Evidence 6

date	source	what it proved
2026-10-21	docs.aws.amazon.com/whitepapers/latest/how-aws-pricing-works	'Always Free ... Amazon DynamoDB: Up to 200 million requests per month (25 write capacity units (WCUs) and 25 read capacity units (RCUs)); 25 GB of storage.'
2026-10-21	aws.amazon.com/dynamodb/pricing/	'the first 25 GB of storage are included in the AWS Free Tier'; 'The first 25 GB of storage are included in the AWS Free Tier in each AWS Region'; 'The AWS Free Tier includes 25 WCUs and 25 RCUs'
2026-10-21	docs.aws.amazon.com/amazondynamodb/latest/developerguide/Con	'The maximum item size in DynamoDB is 400 KB, which includes both attribute name binary length (UTF-8 length) and attribute value lengths'
2026-10-21	docs.aws.amazon.com/amazondynamodb/latest/developerguide/Cap	'A binary value must be encoded in base64 format before it can be sent to DynamoDB, but the value's raw byte length is used for calculating size'; 'All items in DynamoDB require 100 bytes of storage overhead per item'
2026-10-21	aws.amazon.com/ec2/pricing/on-demand/	'AWS customers receive 100 GB of free data transfer out to the internet free each month, aggregated across all AWS Services and Regions'
2026-10-21	source not published	arithmetic: 25 RCU x 4 KB = 100 KB/s = 8.64 GB/day of reads — 58x short of 500 GB/day, and this is the BEST op-to-byte ratio among the metered-capacity stores

More fields 1

dead end	`{"failure_class": "retention","why": "25 GB of storage, always free (does not expire), plus 25 WCU and 25 RCU provisioned capacity and ~200M requests/month","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