# Backblaze B2

> Low-cost S3-compatible storage with free egress to 3x stored

Backblaze B2 is a managed S3-compatible object store priced well below the hyperscalers, with free monthly egress up to three times the stored volume and no minimum storage duration.

Website: https://www.backblaze.com/cloud-storage

## Use it when

- The bill must be small and predictable: storage priced well below the hyperscalers, egress free up to three times stored volume each month.
- Data may be deleted at any time; there is no minimum storage duration, the direct contrast with Wasabi.
- The workload is backup, archive, or media serving, often with a CDN in front.
- Existing S3 tooling should work unchanged against a compatible API.

## Think twice when

- Compute must sit next to the data; there is no colocated query engine or analytics ecosystem, so engines read across the network.
- Reads regularly exceed three times stored volume, where the free-egress advantage runs out.
- You need tiering or multi-region: there is deliberately one storage class, and an account is tied to a single region (Cloud Replication copies between buckets).
- Event-driven pipelines are central; notifications are webhooks only, capped at 25 rules per bucket.

## How it runs

Fully managed, with eleven-nines durability from Reed-Solomon 17+3 shards spread across twenty cabinets. Object Lock covers governance and compliance WORM with legal holds. A native B2 API sits alongside the S3-compatible one, and a standing free tier covers the first 10 GB.

## Details

### General

| Attribute | Value |
| --- | --- |
| License | Commercial |
| Deployment | Managed |
| Operational complexity | Low |
| Pricing | Free, Subscription |
| Documentation | https://www.backblaze.com/docs/cloud-storage |

### Object Storage

| Attribute | Value |
| --- | --- |
| S3 API | Compatible, alongside a native B2 API |
| Interfaces | Object only |
| Egress | Free to 3x average stored, then charged |
| Storage tiers | Deliberately one tier |
| Minimum duration | None: no minimum retention |
| Durability model | Eleven nines annual: Reed-Solomon 17+3 shards across 20 cabinets |
| Multi-region | Cloud Replication between buckets, but an account is tied to one region |
| Event notifications | Webhooks: HTTPS POST, up to 25 rules a bucket |
| Immutability | Object Lock WORM: governance or compliance, plus legal hold |
| Minimum deployment | None: fully managed |

## Capabilities

- [Object Storage](https://matca.io/capabilities/object-storage)

---

Source: https://matca.io/backblaze-b2
Last updated: 2026-08-31T11:40:47.868Z