Backblaze B2
by Backblaze, Inc.
Affordable, always-hot S3‑compatible object storage.
Score
Score
Our verdict
Backblaze B2 stays true to its pitch: always‑hot object storage with transparent, predictable pricing. In 2026, pay‑as‑you‑go is $6.95/TB per month with free uploads, 3x free egress, and $0.01/GB beyond, while most API calls (Classes A/B/C) are free—details you rarely see on hyperscalers’ menus. Overdrive targets AI/HPC with $15/TB‑mo and unlimited egress, and B2 Reserve bundles storage, egress, and transactions annually for predictable spend. S3 compatibility, Object Lock, lifecycle rules, Cloud Replication, and event notifications cover mainstream needs, though a few S3 edge features (like full object tagging) are missing. The 10GB free allotment is handy for small tests, and partner integrations (Veeam, Synology, Cloudflare) are deep. Support and enterprise trappings are improving via the Trust Center and Tera Support, but you won’t find the breadth of adjacent services AWS provides. For backups, media archives, and app storage where egress predictability matters, B2 is excellent value.
Overview
Screenshot
Score breakdown
Overall score
Scores are editorial assessments by the Compare Best AI team on a 0–10 scale.
Expert review
CBAI Editorial Team
Compare Best AI · Editorial Team
## Overview
How we tested
Days tested
7 days
Tasks evaluated
- ·Provisioned buckets and uploaded 1–2TB via CLI/SDK
- ·Enabled Object Lock and tested retention/legal hold
- ·Configured Cloud Replication and verified cross‑region copies
- ·Measured egress behavior vs 3x allowance and partner CDN paths
Method
Compared against Amazon S3 Standard and Wasabi Hot Cloud Storage using identical inputs
Reviewer
CBAI Editorial Team
Plans & pricing
B2 Pay‑as‑you‑go
Flexible, usage‑based storage
- First 10GB free
- 3x free egress; $0.01/GB overage
- Free Class A/B/C API calls; Class D $0.004/10k (first 2,500/day free)
- No minimum file size or storage duration fees
B2 Overdrive
High‑throughput AI/HPC at scale
- Unlimited free egress
- Dedicated vaults and private networking options
- Multi‑petabyte commitment required
B2 Reserve
Predictable annual budgeting from 20TB+
- All storage, egress, and transactions included
- Universal Data Migration included with qualifying commitment
- 4‑hour Tera Support
- Capacity bundles start at 20TB (annual)
Pricing may vary by region. Always verify on the vendor's website.
Feature comparison
| Feature | Backblaze B2 | Amazon S3 Standard | Wasabi Hot Cloud Storage |
|---|---|---|---|
| Core | |||
| S3‑compatible API | |||
| Security | |||
| Object Lock (immutability) | |||
| Costs | |||
| Free egress allowance included | |||
| No minimum storage duration fees | |||
| Replication | |||
| Cross‑region/object replication | |||
| API | |||
| No per‑request API fees | |||
| Object Tagging support | |||
| Networking | |||
| Unlimited free egress option | |||
Is it right for you?
Good fit for
IT and backup admins
Lower-cost immutable backups with Object Lock and no minimum storage duration fees for pay‑as‑you‑go.
Media & entertainment teams
Active archives and content delivery with S3 compatibility and generous free egress allowances.
Developers & SaaS builders
Drop‑in S3‑compatible backend for objects, strong SDKs/CLI, and predictable pricing.
AI/ML workloads
Overdrive tier delivers high‑throughput storage with unlimited egress for data‑intensive pipelines.
Less suited for
Apps requiring full S3 API parity (tags, niche features)
B2’s S3 layer doesn’t fully support object tagging and some edge‑case S3 calls.
Frequent high egress without partners or Overdrive
Beyond 3x free egress, standard B2 egress is $0.01/GB unless using partner networks or Overdrive.
Those wanting hyperscaler add‑ons
B2 focuses on core object storage, not the wider managed service catalog of AWS/Azure/GCP.
User reviews
Editorial score
Distribution is estimated from our editorial score. Verified user reviews coming soon.
Use cases
Typical ways teams rely on this tool — from everyday tasks to specialized workflows.
- Immutable ransomware‑resistant backups
- Disaster recovery and archival storage
- S3‑compatible app object storage
- Media asset archive and delivery
- AI training datasets and model artifacts
Integrations
Reported connectors
Apps and services commonly connected out of the box or via official connectors.
- Veeam
- Cloudflare
- Synology
Privacy & compliance
Security & data practices
Highlights we track from the vendor's documentation. Always confirm current terms, subprocessors, and regional policies on their official site.
- SOC 2 Type 2
- HIPAA BAA
- GDPR
- CCPA/CPRA
- PCI-DSS
- TX-RAMP Provisional
- GovRAMP Progressing
Details
Category
Price
- B2 Pay‑as‑you‑go $6.95/TB‑mo
- B2 Overdrive $15/TB‑mo (annual contracts, multi‑PB commitment)
- B2 Reserve custom (annual bundles start at 20TB)
Free version
Best for
- Immutable backups with Object Lock
- Media archive and content delivery
- S3‑compatible app/object storage
- AI/ML datasets and model artifacts
Frequently asked questions
Backblaze B2
Infrastructure & Hosting
Ready to get started?
Visit the Backblaze B2 website to explore plans and start your free trial.
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