# Backblaze B2 > backblaze.com | Storage; 1 record: free tier, limits, identity cost and evidence. HTML https://fshy.ajam.dev/p/backblaze/ | JSON https://fshy.ajam.dev/api/v1/entity/backblaze.json | how to read a record: https://fshy.ajam.dev/llms-full.txt ## Backblaze B2 - `storage/backblaze-b2` | qualifies-with-caveat | evidence documented | binding volume-quota | category S3-compatible object storage | tier pay-as-you-go - needs card no, phone no, ID no, institution no | verified 2026-11-03T01:28:26.944Z (live) | stale on 2026-12-04 - url https://www.backblaze.com/cloud-storage/pricing - price USD 6.95 per TB per 30 days, pay-as-you-go, after the first 10 GB | parsed USD 6.95/TB-mo - free tier: First 10GB storage is always free; storage above it is billed per byte-hour at USD 6.95/TB/30-days | unit: GB | metered on: stored-bytes | read on: 2026-10-30 | source: [1] | note: Class A, B and C API calls are free on pay-as-you-go; Class D calls are free up to 2,500 a day. The API pricing page still prints USD 0.005/GB/month for storage after the first 10 GB, while the pricing page and its billing FAQ print USD 6.95/TB/30-days. - per-object cap: Large files can range in size from 5 MB to 10 TB; a file sent in one request is limited to 5 GB | source: [2] | note: 10 TB is the cap for a large (multipart) file, assembled from parts of 5 MB to 5 GB; the page does not say whether TB is decimal or binary, so bytes is left null. - retention: No minimum storage duration fees; the pages read state no expiry for stored files | source: [1] | note: the pricing page lists 'No minimum file size or storage duration fees'; lifecycle rules are set per bucket by the account holder. - egress: Free up to 3x the average monthly stored bytes (byte-hours over the billing cycle), then USD 0.01/GB; unlimited and free to partner CDNs and compute services (Fastly, Cloudflare, bunny.net, CacheFly, CoreWeave, Equinix Metal, Vultr, phoenixNAP) | metered: yes | free allowance: 3x the average monthly stored bytes; unmetered to the named partner CDNs and compute services | price per TB: USD 0.01 per GB beyond the 3x allowance | source: [1] - identity: email | detail: Account creation asks for an email address verified by a link, a password and a data region, and the sign-up page states 'No credit card required.' A public bucket needs a payment history or a small card payment. A help-centre article says enabling B2 on an existing Computer Backup account prompts for a phone number verified by SMS; the account-creation guide names no phone step. - interface: s3-compatible, rest - limits: - volume-quota (binding): 10 GB of storage free; every byte above it is billed at USD 6.95/TB/30-days [1] - volume-quota (binding): egress free up to 3x the average monthly stored bytes; beyond it USD 0.01/GB, except to partner CDNs and compute services [1] - per-object-cap: 10 TB per large file (parts of 5 MB to 5 GB); 5 GB per single-request file [2] - request-rate: Class D transactions: the first 2,500 calls a day free, then USD 0.004 per 10,000 calls; Class A, B and C calls free [1] - limits note: No minimum file size and no minimum storage duration fees. A public bucket needs a verified email address and a payment history on file, or a small card payment credited to the account balance. - binding note: the 10 GB of free storage is the first ceiling; on the paid tier the next one is the 3x-of-stored egress allowance, which partner-CDN egress does not count against - interface detail: S3-Compatible API (the S3 syntax, with limited ACL and tagging support) and the B2 Native API (b2_* calls) - tooling: AWS CLI, AWS SDKs, AWS Tools for PowerShell and s3cmd against the S3-Compatible API; any S3 client, rclone's s3 backend among them; the B2 Native API for b2_* calls - composes with: An S3 origin behind Cloudflare, Fastly or bunny.net: egress to those partner CDNs is free and outside the 3x allowance, so a CDN-fronted public bucket serves reads without the USD 0.01/GB overage. - reliability: no throttle, suspension or data-loss event is stated on the pages read; usage above 10 GB of storage or above the 3x egress allowance is billed automatically - notes: S3-compatible object storage: confirmed. B2 Overdrive, the higher-throughput tier, starts at USD 15 per TB a month with unlimited free egress and needs a multi-petabyte commitment, so it is not a separate entry point. Payment is by credit card or invoice. - evidence note: every value is quoted from a first-party Backblaze page read on 2026-10-30; no request was made against the service, so the read path is unprobed. A probe of a public object would raise it to measured. - evidence: - [1] 2026-10-30: storage is billed per byte-hour at USD 6.95/TB/30-days | capture: sha256:5f5de1f293b9dca52a415d8c22b4ac5ce5c4e74c3da17667fe0d2dacfad1ba8c | quote: Service is billed monthly, based on the amount of data stored per byte-hour over the last month at a rate of $6.95/TB/30-days. - [1] 2026-10-30: the first 10 GB of storage is free with no time limit | capture: sha256:5f5de1f293b9dca52a415d8c22b4ac5ce5c4e74c3da17667fe0d2dacfad1ba8c | quote: First 10GB storage is always free. - [1] 2026-10-30: egress is free up to 3x the average monthly stored bytes | capture: sha256:5f5de1f293b9dca52a415d8c22b4ac5ce5c4e74c3da17667fe0d2dacfad1ba8c | quote: All B2 Cloud Storage users get free egress up to 3x their average monthly storage. - [1] 2026-10-30: egress beyond the 3x allowance costs USD 0.01/GB | capture: sha256:5f5de1f293b9dca52a415d8c22b4ac5ce5c4e74c3da17667fe0d2dacfad1ba8c | quote: Egress beyond 3x is just $0.01/GB—no surprise fees, no penalties. - [1] 2026-10-30: egress to the named partner CDNs and compute services is unlimited and free | capture: sha256:5f5de1f293b9dca52a415d8c22b4ac5ce5c4e74c3da17667fe0d2dacfad1ba8c | quote: Backblaze B2 offers unlimited free egress when downloading to or through partner content delivery networks (CDNs) and compute services, including Fastly, Cloudflare, bunny.net, CacheFly, CoreWeave, Equinix Metal, Vultr, and phoenixNAP. - [1] 2026-10-30: there is no minimum object size charge and no minimum storage duration charge | capture: sha256:5f5de1f293b9dca52a415d8c22b4ac5ce5c4e74c3da17667fe0d2dacfad1ba8c | quote: No minimum file size or storage duration fees - [1] 2026-10-30: Class A, B and C calls are free; Class D calls cost USD 0.004 per 10,000 after 2,500 free a day | capture: sha256:5f5de1f293b9dca52a415d8c22b4ac5ce5c4e74c3da17667fe0d2dacfad1ba8c | quote: Class A, B, and C API calls are free for pay-as-you-go customers. Class D transactions cost $0.004 per 10,000 calls plus the first 2,500 calls per day are free. - [1] 2026-10-30: B2 is S3-compatible object storage | capture: sha256:5f5de1f293b9dca52a415d8c22b4ac5ce5c4e74c3da17667fe0d2dacfad1ba8c | quote: Enterprise-grade, security & compliance-ready, S3 compatible object storage—at a fraction of the cost. - [1] 2026-10-30: B2 Overdrive needs a multi-petabyte commitment | capture: sha256:5f5de1f293b9dca52a415d8c22b4ac5ce5c4e74c3da17667fe0d2dacfad1ba8c | quote: Multi-petabyte commitment required - [1] 2026-10-30: pay-as-you-go is paid by credit card or invoice | capture: sha256:5f5de1f293b9dca52a415d8c22b4ac5ce5c4e74c3da17667fe0d2dacfad1ba8c | quote: Credit card or invoice - [3] 2026-10-30: the S3-Compatible API accepts applications written to the S3 API | capture: sha256:fcf4b8277e9a6066bc6b8633ce6eff75167f17d61c6114d20affe485a8e25aec | quote: Backblaze B2 will just work, with minimal code changes on your end. - [2] 2026-10-30: the largest object is a 10 TB large file; a normal (single-request) file is limited to 5 GB | capture: sha256:47a5776dfc63edf0c960545d252fda69c0fd2b72e0a8951c5575f34b28454ae0 | quote: Large files can range from 5 MB to 10 TB which is well beyond the 5 GB limit on normal files. - [4] 2026-10-30: the B2 sign-up asks for no credit card | capture: sha256:5a216594a28f7cd3d932dc05e800a857fe20bc742c25040e3ab02dc5e84d54f3 | quote: No credit card required. - [5] 2026-10-30: account creation verifies the email address by a link, then asks for a password and a data region | capture: sha256:e98064685c3f178ec75959e3888cd913974407d8c8dbcfdfad06f54beef03132 | quote: Check your email, and click the link to verify your email address. - [6] 2026-10-30: a first public bucket needs a payment history or a small card payment | capture: sha256:5090042d4be16c75851b8a0461dbd0021ffc6b9bf668e6013f20b44daa79f779 | quote: Have a payment history on file, or use the credit card form to pay a small fee that is credited to your account balance. - [7] 2026-10-30: enabling B2 on an existing Computer Backup account prompts for an SMS-verified phone number | capture: sha256:81a857f43c6d2861e8b56ab81e0fc7a10e316d9d8a2d41bb3715380dd654527b | quote: When activating B2 on your account in this way, you will be prompted to enter a phone number that must be verified via SMS. - [8] 2026-10-30: the API pricing page prints USD 0.005/GB/month for storage after the first 10 GB, a figure the pricing page no longer uses | capture: sha256:260665afdd6bc8921f3abbe1fb232959ddd491c52454a5d4ed34df55e7ebe6af | quote: Once uploaded, storage charges apply to all data after the first 10GB in your account at the rate of $0.005/GB/month. - [1] 2026-11-03: storage is still billed at USD 6.95/TB/30-days per byte-hour | capture: sha256:284c0b920f9fd2b0533f8d4a023f87ab118a0d42db3366d0734c979bbc34a5fe | quote: Service is billed monthly, based on the amount of data stored per byte-hour over the last month at a rate of $6.95/TB/30-days. - [1] 2026-11-03: egress is free up to 3x the average monthly storage | capture: sha256:284c0b920f9fd2b0533f8d4a023f87ab118a0d42db3366d0734c979bbc34a5fe | quote: All B2 Cloud Storage users get free egress up to 3x their average monthly storage. - [1] 2026-11-03: egress beyond 3x costs USD 0.01/GB | capture: sha256:284c0b920f9fd2b0533f8d4a023f87ab118a0d42db3366d0734c979bbc34a5fe | quote: Egress beyond 3x is just $0.01/GB—no surprise fees, no penalties. - [1] 2026-11-03: egress to or through Cloudflare and the other named partners is unlimited and free | capture: sha256:284c0b920f9fd2b0533f8d4a023f87ab118a0d42db3366d0734c979bbc34a5fe | quote: Backblaze B2 offers unlimited free egress when downloading to or through partner content delivery networks (CDNs) and compute services, including Fastly, Cloudflare, bunny.net, CacheFly, CoreWeave, Equinix Metal, Vultr, and phoenixNAP. - [9] 2026-11-03: public B2 buckets can be served through Cloudflare's CDN with no Backblaze download fees | capture: sha256:fe89760ed0aad284ec0cb03d01040b4f3f3e5b59a6ef67cd40e202b45afdde12 - [4] 2026-11-03: the B2 sign-up page asks for no credit card | capture: sha256:76878f904476c71b3af0f45b87dffdd957a052050b9d968faae0fbf1db75863d | quote: No credit card required. - [5] 2026-11-03: account creation verifies the email address by a link | capture: sha256:e98064685c3f178ec75959e3888cd913974407d8c8dbcfdfad06f54beef03132 | quote: Check your email, and click the link to verify your email address. - [6] 2026-11-03: a public bucket needs a payment history or a small card payment | capture: sha256:5090042d4be16c75851b8a0461dbd0021ffc6b9bf668e6013f20b44daa79f779 | quote: Have a payment history on file, or use the credit card form to pay a small fee that is credited to your account balance. - sources: - [1] https://www.backblaze.com/cloud-storage/pricing - [2] https://www.backblaze.com/docs/cloud-storage-large-files - [3] https://www.backblaze.com/docs/cloud-storage-s3-compatible-api - [4] https://www.backblaze.com/sign-up/cloud-storage - [5] https://www.backblaze.com/docs/en/cloud-storage-enable-backblaze-b2 - [6] https://www.backblaze.com/docs/cloud-storage-create-and-manage-buckets - [7] https://help.backblaze.com/hc/en-us/articles/360035350993-B2-Quick-Start-Guide - [8] https://www.backblaze.com/cloud-storage/transaction-pricing - [9] https://www.backblaze.com/docs/cloud-storage-deliver-public-backblaze-b2-content-through-cloudflare-cdn