Wasabi Cloud Storage API
S3-compatible cloud object storage with flat-rate pricing designed for cost-effective backup, archival, and active storage — marketed as 80% cheaper than Amazon S3.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
S3-compatible cloud storage. AWS-compatible credentials (access key + secret). IAM policies for fine-grained access. No egress fees — good for backups. Immutable storage available.
⚡ Reliability
Best When
You need S3-compatible cloud storage at significantly lower cost and your workloads are not compute-adjacent to AWS.
Avoid When
Your storage is on AWS where S3 data transfer fees are free, or you need sub-millisecond latency with CDN integration.
Use Cases
- • Cost-effective backup and archival storage replacing S3 or Glacier
- • Large file and media asset storage for applications
- • Offsite backup destination for servers and databases
- • Video and podcast media storage for streaming applications
- • AI/ML training data and model artifact storage
Not For
- • Low-latency edge delivery (use CDN in front of Wasabi)
- • Very small files at high frequency (minimum 4KB charge per file)
- • Compute-adjacent storage where AWS S3 data transfer is free
- • Teams needing serverless compute tightly coupled with storage
Interface
Authentication
AWS Signature V4 (SigV4) compatible — any S3 SDK works by changing the endpoint URL to us-east-1.wasabisys.com (or region-specific). Access key and secret key model identical to S3.
Pricing
Flat $6.99/TB/month with no egress charges. Minimum storage charge: 1TB/month or $6.99 minimum. Small objects charged at 4KB minimum. No API call charges.
Agent Metadata
Known Gotchas
- ⚠ Minimum 90-day retention policy — deleting objects before 90 days still charges for 90 days
- ⚠ Minimum object size billing of 4KB — many small files get expensive quickly
- ⚠ $6.99/month minimum charge regardless of usage
- ⚠ No native CDN — must use CloudFront or other CDN in front for performance-critical delivery
- ⚠ Bucket region selection is permanent — can't move buckets between regions
- ⚠ Not cost-effective for workloads with very high DELETE frequency due to retention policy
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Wasabi Cloud Storage API.
Scores are editorial opinions as of 2026-03-06.