Duplicati vs Backblaze B2
A detailed comparison to help you choose between Duplicati and Backblaze B2.
Quick Verdict
4.0/5
Duplicati
0 reviews
4.2/5
Backblaze B2
0 reviews
Backblaze B2 is rated higher (4.2 vs 4.0). Duplicati is a free, open source backup client that stores encrypted, compressed backups to local drives or cloud storage (S3, B2, Google Drive, OneDrive, and more). Web-based UI. 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.
Duplicati Free open source backup to any cloud storage | Backblaze B2 S3-compatible object storage at $6.95/TB/month with 3x free egress | |
|---|---|---|
| Overview | ||
| Rating | 4.0 (0 reviews) | 4.2 (0 reviews)✓ |
| Pricing model | freemium | usage-based |
| Starting price | Free tier available✓ | From $6.95/mo |
| Best for | Home users and small businesses wanting free, encrypted, bring-your-own-storage backups with a GUI and a scriptable CLI | 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 tieropen source | free tiers3 compatibleus datacenterapi access |
| Visit Duplicati → | Visit Backblaze B2 → | |
Duplicati
Pros
- + Client is completely free (MIT core) — you only pay your storage provider
- + Client-side AES-256/GPG encryption with keys that never leave your machine
- + Wide backend coverage: S3, B2, Azure, Google Drive, OneDrive, MEGA, Storj, WebDAV, SFTP, FTP and more
- + Incremental backups, deduplication, compression and scheduling keep storage costs low
- + Cheap tenant backup for Microsoft 365 and Google Workspace at $0.50 per user per month
Cons
- - Local metadata database can desync after interrupted runs; repair on large sets is slow
- - Years of 2.x beta left a mixed reliability reputation that newer releases have had to overcome
- - Free-tier support is community-only (forum, GitHub issues); priority support is a paid console feature
- - Open-core split: parts of the repository (console stack) are under the company's license, not MIT
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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