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 required, 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. |
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 5
$.binding_noteboilerplate$.per_object_cap.notesthe field may be stated in a source that was not read$.per_object_cap.statedthe field may be stated in a source that was not read$.retention.notesthe field may be stated in a source that was not read$.retention.statedthe field may be stated in a source that was not read