Backblaze B2
A low-cost S3-compatible cloud storage service with free egress to CDN partners through the Bandwidth Alliance, designed for cost-effective bulk storage.
Summary
A low-cost S3-compatible cloud storage service with free egress to CDN partners through the Bandwidth Alliance, designed for cost-effective bulk storage.
B2 occupies the budget tier of S3-compatible cloud storage. Its low per-GB pricing and free egress to partners (Cloudflare, Fastly) make it attractive for backup, archive, and media delivery workloads where cost dominates.
- B2 is not AWS S3. Some S3 features are missing or behave differently. Performance characteristics, request rate limits, and consistency guarantees differ from AWS.
- Free egress only applies to Bandwidth Alliance partners. Direct internet egress has standard charges.
implementsS3 API — S3-compatible interfacesolvesEgress Cost — free egress to CDN partnerssolvesVendor Lock-In — S3-compatible alternative to AWS
Definition
Low-cost S3-compatible cloud object storage with transparent pricing and zero egress to Cloudflare, Fastly, and other CDN partners via the Bandwidth Alliance.
S3 storage and egress pricing is opaque and expensive at scale. B2 offers dramatically lower per-GB storage costs and free egress to partner networks, making it attractive for archival and media-heavy workloads.
Low-cost archival storage, media asset management, S3-compatible backup target, budget-friendly data lakes.
Connections 6
Outbound 5
Inbound 1
constrained_by1Resources 3
Official B2 Cloud Storage documentation covering APIs, integrations, and storage management.
B2 S3-compatible API documentation enabling drop-in replacement for S3 workloads at lower cost.
S3 compatibility announcement explaining how B2 supports the S3 API for seamless migration from AWS.