S3 object storage: what Backblaze B2, Wasabi, OVHcloud and Bunny really cost

Anyone storing backups or website images on S3-compatible object storage looks at the price per TB per month, but the line item that really changes the bill is egress—the outbound traffic. We've reviewed the official price lists for Backblaze B2, Wasabi, OVHcloud and Bunny Storage as of 21 October 2026.

The price list, line by line

Provider	Storage per TB/month	Egress	Minimum billing	S3 API
Backblaze B2	$6.95	Free up to 3× average monthly storage, then $0.01/GB	No minimum duration, first 10 GB free	Yes, native
Wasabi (Pay as You Go)	$7.99	Free within 1:1 ratio with active storage (hard cap 100 TB/month)	1 TB billed regardless, minimum 90-day object retention	Yes
OVHcloud Object Storage Standard Multi-Zone	Check public price list in local currency	No charge for inbound or outbound traffic	Minimum billing at 1 hour	Yes, S3-compatible
Bunny Storage (Edge Tier SSD)	$20.48 ($0.02/GB) per single region	Free to Bunny CDN, no API call charges	$1/month	HTTP/FTP API, not native S3

On Backblaze B2, pay-as-you-go pricing starts at $6.95 per TB every 30 days, calculated byte-hour, with the first 10 GB free, standard API calls free, free uploads and downloads up to three times average monthly storage; beyond that threshold direct egress costs $0.01/GB. The price hasn't always been this: the product update in March 2026 raised storage from $6 to $6.95/TB and removed standard API call charges.

On Wasabi, the picture is different. Wasabi moved its pay-as-you-go pricing to $7.99/TB per month from 1 July 2026, across all regions, citing higher storage hardware, energy and data centre costs—an increase from the previous $6.99 that represents roughly 14%. The constraint to keep in mind is minimum retention: if an object is deleted before spending 90 days on Wasabi under the Pay as You Go model, a Timed Deleted Storage charge kicks in equal to the storage cost for the remaining days. On top of this is the monthly minimum: anyone storing less than 1 TB of active storage is still billed for 1 TB, with an official example from Wasabi's knowledge base showing how 750 GB actual becomes padded with an additional charge up to the threshold.

OVHcloud publishes a model different from the other three: it's designed to pay only for capacity actually stored and data restored, with no hidden charges for inbound or outbound traffic or API calls, with an Amazon S3-compatible solution. The Standard Multi-Zone class, the most comparable to the other three for general use, has a minimum storage billing of 1 hour and no data retrieval charge. The public price list in dollars or euros per GB didn't emerge from the product page checked: anyone needing exact figures will find it in OVHcloud's official pricing calculator.

Bunny Storage, the only one of the four without native S3 API (it uses FTP, SFTP and proprietary HTTP API), plays its hand on the CDN: the Standard HDD class costs $0.01/GB per storage region up to two regions, $0.005/GB per additional region, with a $1/month pay-as-you-go minimum, free traffic to Bunny CDN, no API call or egress charges via API. The Edge Tier SSD class, which is faster, costs $0.02/GB per region—that's $20 per TB per month: pricier than B2 and Wasabi on raw storage, but without the minimum retention constraint that penalises Wasabi on frequently-rotating data.

What changes for those paying the bill

For an archive that sits idle for months, Wasabi and B2 remain cheapest on raw storage, but the final bill depends on traffic: B2 gives away up to 3× storage in downloads, Wasabi only up to parity with active storage. Those who delete and rewrite objects on Wasabi often before 90 days still pay for the missing days—a detail that rarely makes it into initial quotes. OVHcloud is the only one of the four with no barriers on inbound, outbound or API calls, at the cost of lower adoption in backup tools versus B2 and Wasabi. Bunny remains the choice when object storage is merely the origin for a CDN already in use: egress to your own distribution network is included, direct egress is not.

Bunny Storage is not a Prime Software product.