Backblaze B2 Cloud Storage vs SeaweedFS

Backblaze B2 Cloud Storage8.8Visit SeaweedFS8.6Visit

Higher score Backblaze B2 Cloud Storage #6 in Object Storage Services 8.8/10 Free plan Free plan✓ 4 of 4 features Visit Backblaze

vs

SeaweedFS #8 in Object Storage Services 8.6/10 Free plan Free plan✓ 4 of 4 features Visit SeaweedFS

• Backblaze B2 Cloud Storage fits best

  Low-cost storage and backup integrations

• SeaweedFS fits best

  Open-source storage with file and data-lake access

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Side by side

Feature	Backblaze B2 Cloud Storage 8.8/10 Visit ↗	SeaweedFS 8.6/10 Visit ↗
At a glance
Editor score	8.8	8.6
Ranking	#6 in Object Storage Services	#8 in Object Storage Services
Best for	Low-cost storage and backup integrations	Open-source storage with file and data-lake access
Pricing model	Free plan + paid	Free plan + paid
Starting price	—	$20/GB/yr
Free plan	✓	✓
Free trial	—	—
Deployment	Cloud	Desktop, Self-hosted
Platforms	Web	Linux, macOS, Windows
Integrations	8 integrations	14 integrations
Features Backblaze B2 Cloud Storage 4/4 · SeaweedFS 4/4
S3 compatibility	✓	✓
Object versioning	✓	✓
Lifecycle rules	✓	✓
Object immutability	✓	✓
Specs
Max object size	10000 GB	Not checked yet
Replication scope	Cross-region	Cross-region
Our review
Pros	First 10GB of storage is always free S3 and native B2 APIs support application and backup workflows Object Lock, version retention, and cross-region replication included	S3-compatible API plus POSIX and FUSE file access Versioning, lifecycle rules, Object Lock, and replication Kubernetes support with Helm and CSI integration
Cons	Feature breadth is narrower than the highest-ranked cloud platforms Free egress is limited to 3x average monthly storage The listed plan uses pay-as-you-go monthly billing	Free use is limited to development and testing under 25 TB Production deployments require a paid license Enterprise pricing is custom for 5 PB and above
Our verdict	Backblaze B2 Cloud Storage is an always-hot object storage service for businesses, developers, IT teams, and individuals. It stores files in buckets accessible through a web interface, command-line tools, and APIs. The service is… Read the review →	SeaweedFS is a self-hosted distributed storage system for teams that need object, file, and data-lake access in one deployment. It provides an S3-compatible object storage API, POSIX and FUSE access, HDFS compatibility, WebDAV, and Iceberg… Read the review →

Strengths and trade-offs

• Backblaze B2 Cloud Storage — where it wins

  • First 10GB of storage is always free
  • S3 and native B2 APIs support application and backup workflows
  • Object Lock, version retention, and cross-region replication included

  Where it doesn't

  • Feature breadth is narrower than the highest-ranked cloud platforms
  • Free egress is limited to 3x average monthly storage
  • The listed plan uses pay-as-you-go monthly billing

• SeaweedFS — where it wins

  • S3-compatible API plus POSIX and FUSE file access
  • Versioning, lifecycle rules, Object Lock, and replication
  • Kubernetes support with Helm and CSI integration

  Where it doesn't

  • Free use is limited to development and testing under 25 TB
  • Production deployments require a paid license
  • Enterprise pricing is custom for 5 PB and above

• Backblaze B2 Cloud Storage8.8/10 · Free plan

  A low-cost object storage option with strong backup, retention, and replication features.

  Visit BackblazeFull verdict →
• SeaweedFS8.6/10 · Free plan

  A flexible open-source storage system for teams that need S3 and file access.

  Visit SeaweedFSFull verdict →