Azure Blob Storage vs Backblaze B2
A detailed comparison to help you choose between Azure Blob Storage and Backblaze B2.
Quick Verdict
3.9/5
Azure Blob Storage
0 reviews
4.2/5
Backblaze B2
0 reviews
Backblaze B2 is rated higher (4.2 vs 3.9). Microsoft Azure's object storage service for storing massive amounts of unstructured data like documents, images, and backups. Built for enterprises needing reliable, cost-effective cloud storage with compliance options. Backblaze B2 offers S3-compatible object storage at $6.95/TB/month (raised from $6/TB in May). Free egress up to 3x stored data for all customers, unlimited free egress to partner CDNs/compute.
Azure Blob Storage Scalable cloud object storage for unstructured data at enterprise scale | Backblaze B2 S3-compatible object storage at $6.95/TB/month with 3x free egress | |
|---|---|---|
| Overview | ||
| Rating | 3.9 (0 reviews) | 4.2 (0 reviews)✓ |
| Pricing model | usage-based | usage-based |
| Starting price | From $0.0184/mo✓ | From $6.95/mo |
| Best for | Microsoft-centric enterprises and Azure-native analytics/backup workloads needing compliant, tiered object storage with global residency | Backup targets, snapshot archives, and asset storage where low, predictable cost beats global distribution |
| Features | ||
| IPv6 | ✓ | |
| DDoS protection | ✓ | |
| Automated backups | ||
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ||
| Free tier | ||
| Data-center locations | ||
| Regions | — | ["US West (Sacramento, Stockton, Phoenix)", "US East (Reston, VA)", "EU Central (Amsterdam, NL)", "CA East (Toronto, ON)"] |
| Tags | ||
| Tags | free tiers3 compatibleapi accesseu datacenterus datacenterapac datacenterterraform provider | free tiers3 compatibleus datacenterapi access |
| Visit Azure Blob Storage → | Visit Backblaze B2 → | |
Azure Blob Storage
Pros
- + Four cost-optimized access tiers with fully published per-GB and per-operation prices
- + Mature redundancy ladder (LRS through RA-GZRS) with 11 nines claimed durability on LRS
- + Deep Azure integration: Entra ID auth, Private Link, lifecycle management, immutable storage
- + Reserved capacity discounts up to roughly a third on committed storage
- + Global footprint with EU, US, and APAC data residency plus sovereign clouds
Cons
- - No native S3 API — S3-designed tooling needs a third-party proxy
- - Egress, retrieval, and early-deletion fees often dwarf the capacity cost
- - Portal, RBAC, and account-kind surface area is a real learning curve
- - Cool/Cold/Archive tiers carry lower availability targets (99%) and minimum retention periods
- - SLA is 99.9% with capped service credits, not an availability guarantee
Backblaze B2
Pros
- + $6.95/TB/month storage with no minimum file size or storage duration fees
- + Free egress up to 3x average monthly storage for all customers; unlimited free egress to partner CDNs/compute
- + Genuine S3-compatible API plus native API, with free Class A/B/C transactions
- + 11 nines claimed durability with published Vault math (20 shards across 20 pods)
- + EU data residency via the Amsterdam region; permanent 10 GB free tier
Cons
- - One region per account (fixed at creation); no cross-region buckets or read replicas
- - S3 compatibility is partial: no IAM roles, object tagging, or website hosting; bucket-level ACLs only
- - SLA is thin: 99.9% objective with 5–10% service credits
- - Storage price rose from $6 to $6.95/TB in May — value still strong, but the direction is upward
- - No compute, functions, or database services
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