Guide
Rehydration makes archived data readable; it is not delivery
Prices checked · Vendor details further down checked
Rehydrating 10 TB from Azure Blob Storage's Archive tier in East US costs $700.00 at standard priority, up to 15 hours for objects under 10 GB, or $6,000.00 at high priority, which may complete in less than 1 hour for objects under 10 GB. Those times are for one blob, not the whole job: Azure Blob Storage rehydrates at most 10 GiB an hour per storage account at high priority, so 10 TB in one account takes at least 931 hours (39 days) at high priority, and Microsoft publishes no time for a bulk job at standard priority. The rehydrated copy is then billed as Hot or Cool storage until you delete it.
| Class and priority | Ready | Per GB | Per 1,000 files | 10 TB in 1 million files |
|---|---|---|---|---|
| Archive LRS: Standard rehydration Azure Blob Storage · United States (East US) | Up to 15 hours for objects under 10 GB | $0.02 per GB | $0.50 | $700.00 |
| Archive LRS: High-priority rehydration Azure Blob Storage · United States (East US) | May complete in less than 1 hour for objects under 10 GB | $0.10 per GB | $5.00 | $6,000.00 |
| Archive LRS: Standard rehydration Azure Blob Storage · Netherlands (West Europe) | Up to 15 hours for objects under 10 GB | $0.024 per GB | $0.60 | $840.00 |
| Archive LRS: High-priority rehydration Azure Blob Storage · Netherlands (West Europe) | May complete in less than 1 hour for objects under 10 GB | $0.13 per GB | $6.50 | $7,800.00 |
10 TB in 1 million files rehydrated once, at Azure's two priorities. The times are Azure's for one blob under 10 GB, not for the whole 10 TB. Downloading the data and keeping the online copy are billed on top.
Put your own numbers through the calculator to see what this charge does to a normal month and to the month you restore.
Rehydration makes archive data readable before final delivery
Rehydration is Azure's term for bringing an Archive blob into an online access tier. Azure supports changing the archived blob's tier or copying it to a new online blob, and it publishes Standard and High Priority rehydration options. [1]
The same recovery stage uses different vendor language elsewhere. Amazon S3 uses restore for creating temporary access to offline archive objects. Rehydration or restore makes data readable; later GET operations and egress move the bytes to the recovery destination. [2] [3]
Show the tableas checked 26 July 2026
| Step | What happens | Possible bill line | Source |
|---|---|---|---|
| Request archive access | A restore or rehydration operation is submitted [1] [2] | Restore or rehydration request | [1] [2] |
| Make data readable | The source changes to an online tier or a readable copy is created, depending on the workflow [1] [2] | Bytes read back and possible temporary or online-copy storage | [1] [2] |
| Read the object | The recovery tool issues GET or equivalent read operations [2] | Read requests | [2] [3] |
| Deliver the bytes | Readable data moves to the named recovery destination [3] | Destination-aware egress | [3] |
Rehydration language and copy behavior vary by vendor
Our price table has no general rehydration field, so the table below reports only workflows described in the official sources we checked. A missing named mode is shown as not published, or marked as not applying to the class we checked, rather than guessed from an Archive label. [4]
Azure and Amazon publish the clearest named workflows. Vultr documents a Standard copy for archive restores, and Tigris moves restored Archive data into its Standard tier for the window you choose. OVHcloud charges $0.01062 per GiB to retrieve Cold Archive data, bills the restored copy at the Standard storage rate while you keep it, and says a restore takes from a few minutes to several hours for up to a terabyte, and at most 48 hours for hundreds of terabytes. [1] [2] [12] [11] [13] [14]
Show the table (9 workflows)as checked 26 July to 12 October 2026
| Provider or class | Vendor term or workflow | What happens to the original | Still unclear | Source |
|---|---|---|---|---|
| Azure Blob Archive | Rehydration by changing the access tier or copying to an online blob; Standard and High Priority modes [1] | In-place tier change modifies the source tier; copy rehydration leaves the archived source and creates another blob | Exact price is region-specific and must be taken from Azure's Retail Prices API for the selected region [5] | [1] [5] |
| Amazon S3 Glacier Flexible Retrieval and Deep Archive | Restore request creates temporary access for a selected number of days [2] | The archived source remains and a temporary readable copy is billed under the applicable online storage rule [2] [3] | Retrieval mode, object count, copy duration, and destination remain required inputs | [2] [3] |
| Google Cloud Nearline, Coldline, and Archive | No named rehydration mode published [4] | Reads use the class retrieval and request rules in the pricing we checked | A missing rehydration mode is not evidence of a temporary-copy charge | [4] [6] |
| Cloudflare R2 Infrequent Access | No named rehydration mode; reads carry retrieval and operation charges [7] | No temporary rehydrated-copy rule is published in the pricing we checked | Temporary-copy storage does not apply to the workflow we checked; this is not a promise for every case | [7] [4] |
| DigitalOcean Spaces Cold Storage | No named rehydration mode is published [4] | Cold objects are read directly, with no restore step; DigitalOcean sells Cold for data that needs instant retrieval | Nothing: there is no temporary copy to pay for | [4] [8] [9] |
| OVHcloud Cold Archive | A restore makes the data readable for a period you choose [13] | The restored data is billed at the Standard storage rate for that period [13] | Retrieval is $0.01062 per GiB; OVHcloud says a restore takes from a few minutes to several hours for up to a terabyte, and at most 48 hours for hundreds of terabytes [13] [14] | [13] [14] [4] |
| Vultr Archive | Small objects download directly; larger ones need a restore request, readable for the days you choose, 7 by default [11] | The archived original stays; the restored data is billed as unarchived storage while it is readable | How long a whole restore takes is not published | [11] [4] [15] [16] |
| Tigris Archive | A restore moves the data into the Standard tier for the window you choose, then back to Archive [12] | Standard storage is billed for the restored days and Archive storage for the rest; the restore itself has no retrieval charge [12] | Restore latency is not published in the pricing we checked | [12] [4] |
| Vendors without an archive-rehydration workflow | Backblaze B2, Wasabi, IDrive e2, Hetzner, Akamai, Storj Standard, Filebase, and Telnyx have no named rehydration workflow in the main offers we checked [4] | does not apply to the classes we checked | This is not a claim about future products | [4] |
Rehydration is read-only unless the workflow separately changes or removes the source
Copy rehydration and temporary-restore workflows preserve the archived source. Their possible bill lines are retrieval, restore and read requests, temporary or online-copy storage, and egress. They do not trigger early deletion on the unchanged source. [1] [2] [3]
An in-place tier change is different because it transitions the source object. Whether a minimum-duration remainder applies then depends on the provider, class, object age, and transition rule. That early-deletion charge should not be attached to every restore. [1] [3]
Show the tableas checked 26 July to 12 October 2026
| Recovery path | Early-deletion charge | Egress charge | Source |
|---|---|---|---|
| Copy or temporary restore while preserving the source | does not apply to the read-only source [1] [2] | Apply the destination-aware transfer rule after data is readable | [1] [2] |
| In-place transition from archive to an online tier | conditional on class, object age, and the provider's transition rule [1] | Egress remains separate from the transition | [1] |
| Backblaze B2 final delivery | does not apply for a read-only restore | Free up to 3 times average monthly storage, then $0.01/GB [17] | [17] |
| Cloudflare R2 final delivery | does not apply for a read-only restore | Internet egress not charged; Class A and B operations and Infrequent Access retrieval remain separate [7] | [7] |
| Wasabi final delivery | does not apply for a read-only restore | Egress not charged; regularly downloading more than you store is outside Wasabi's fair-use guideline [18] | [18] |
Sources
Every figure above comes from one of these pages, on the date shown. Each numbered reference in the text links to its entry here. Vendors change prices; if a date looks old, check the source. Three vendors publish a downloadable price feed and the rest are re-checked by hand, which is why the dates are not uniform.
Source pages checked 18 sources
- 1 Azure docs: Blob rehydration from the archive tier learn.microsoft.com · checked 26 July 2026
- 2 Amazon S3 docs: Restoring an archived object docs.aws.amazon.com · checked 26 July 2026
- 3 AWS: Amazon S3 pricing aws.amazon.com · checked 26 July 2026
- 4 Our price table (all vendors) backupstorageprices.com · checked 25 July 2026
- 5 Azure retail price list prices.azure.com · checked 25 July 2026
- 6 Google Cloud Storage pricing cloud.google.com · checked 26 July 2026
- 7 Cloudflare R2 docs: Pricing developers.cloudflare.com · checked 25 July 2026
- 8 DigitalOcean: Spaces Object Storage pricing www.digitalocean.com · checked 26 July 2026
- 9 DigitalOcean docs: Spaces pricing docs.digitalocean.com · checked 26 July 2026
- 10 OVHcloud: Cold Archive www.ovhcloud.com · checked 25 July 2026
- 11 Vultr docs: Object Storage subscription limits docs.vultr.com · checked 26 July 2026
- 12 Tigris pricing www.tigrisdata.com · checked 25 July 2026
- 13 OVHcloud: Public Cloud prices www.ovhcloud.com · checked 11 October 2026
- 14 OVHcloud: Cold Archive www.ovhcloud.com · checked 11 October 2026
- 15 Vultr docs: How to restore archived objects docs.vultr.com · checked 12 October 2026
- 16 Vultr blog: Archival storage blogs.vultr.com · checked 12 October 2026
- 17 Backblaze: B2 API pricing (Class A, B, C, D) www.backblaze.com · checked 25 July 2026
- 18 Wasabi: Pay as you go pricing FAQs wasabi.com · checked 12 October 2026