Wasabi vs S3 for backup storage is usually framed as a per-GB price comparison, and that's the wrong comparison to run. Both do the same basic job: hold a copy of your data somewhere that isn't your own infrastructure. Wasabi charges one flat rate per terabyte per month and nothing else, while AWS S3 charges for storage and then charges again, separately, when you actually pull that data back out. For backup specifically, where the entire point of paying for storage is that you might one day need everything back at once, that second charge is usually the bigger one, and it's the one most price comparisons leave out.
Wasabi vs S3 for backup storage: what each one charges just to hold the data
Wasabi's Pay-As-You-Go plan is a flat $7.99 USD per TB per month across all its regions, including its Sydney and Melbourne data centres, following a price rise from $6.99 that took effect 1 July 2026 (Wasabi's own pricing page; corroborated by LeanOps and N2W Software). There's no separate tier for "hot" versus "cool" access and no cheaper archive class. Every byte costs the same whether it was written five minutes or five years ago, and it's available at full speed the moment you need it.
AWS S3 Standard is tiered and cheaper to start: roughly $0.023 per GB per month for the first 50TB in US regions, stepping down further beyond that (published AWS list pricing, corroborated across multiple 2026 pricing guides). Sydney (ap-southeast-2) pricing runs above the US baseline — AWS's own calculator is the only place to get an exact current figure for your region, since third-party sources didn't agree closely enough on a precise Sydney rate to publish one here with confidence. Cheaper storage classes exist too (Standard-IA, Glacier and its tiers), trading a lower per-GB rate for retrieval delays and a separate, metered retrieval fee charged by speed tier. That cost only shows up the day you actually need the data back, which for a backup archive is exactly the day it matters most.
On storage alone, at typical Sydney rates S3 usually isn't dramatically more expensive than Wasabi's flat rate for a mid-sized backup set. The gap opens somewhere else.
The real cost driver: getting your data back out
This is the actual "wasabi vs s3 backup storage" question, because a backup you can't afford to restore isn't really a backup. AWS's data transfer pricing gives the first 100GB out to the internet free each month, aggregated across every AWS service and region you use, then charges $0.09 per GB for the next roughly 10TB, stepping down to $0.085/GB, then $0.07/GB, then $0.05/GB at higher volumes (EgressCost.com's dedicated AWS egress breakdown; the same tier structure is corroborated by CloudZero and Proud2beCloud).
Run the numbers on a single 10TB restore — a realistic scenario after a ransomware incident or a lost server, not an edge case. The first 100GB is free. The remaining 9.9TB is billed at $0.09/GB, which comes to roughly $891 for that one restore, on top of whatever you were already paying to store the data. Wasabi charges $0 for the same restore. Its Pay-As-You-Go plan includes egress at no charge, subject to a fair-use limit: downloads capped at roughly the volume you have stored (a 1:1 ratio) or 100TB a month, whichever is lower. A full restore of a backup set you're actually paying to store falls comfortably inside that limit for the overwhelming majority of customers (N2W Software; LeanOps).
That's the maths that actually matters for a backup decision: a provider whose bill spikes the day you need a real restore versus one where the restore itself is free. Test restores, DR drills, and the actual bad day all put egress in play — none of them are edge cases for backup storage specifically, even if they would be for, say, a website's media library.
API requests add up quietly too
Backup software doesn't make one request per file. It makes millions, especially with incremental jobs doing frequent small writes and periodic full-catalogue listings. AWS bills $0.005 per 1,000 PUT/COPY/POST/LIST requests and $0.0004 per 1,000 GET requests (nOps; CloudChipr). Individually tiny, but a backup job doing 10 million PUTs a month lands around $50 in request charges alone before a single byte of egress is counted. Wasabi charges nothing for PUT, GET, LIST or DELETE requests of any volume (N2W Software; checkthat.ai). It's a smaller line than egress, but it's another cost that scales with how often your backup software talks to the bucket rather than with how much useful data sits in it, and backup software talks to the bucket constantly.
The fine print worth reading before you commit
None of this is one-sided, and a fair comparison says so. Wasabi enforces a 90-day minimum storage duration: delete an object before it's been stored 90 days and you're still billed through day 90, as though it were still sitting there (LeanOps; N2W Software). For backup retention policies that already keep data for 90 days or longer this rarely bites, but it matters for short-lived staging copies or anything with an aggressive deletion policy. There's also a practical minimum bill of one TB's worth of storage per account per month, even if actual usage is smaller (N2W Software).
S3's fine print runs the other way: the egress tiers above are aggregated across every AWS service you use, so a heavier AWS footprint elsewhere in your account eats into the free 100GB faster than a standalone backup use case would suggest. Glacier's retrieval fees, mentioned above, can turn an apparently cheap storage class into an expensive one on restore day if the wrong tier gets picked for a workload that actually needs fast, unpredictable access — which describes most backup and DR use cases better than it describes long-term archival.
Which one fits which backup strategy
S3's storage-class tiering and deep integration with the rest of AWS make sense when backup data sits alongside other AWS workloads already paying for that ecosystem — compute, analytics, and lifecycle policies moving data between classes automatically as it ages. It's a reasonable fit when restores are rare, small, or already budgeted for as part of a wider AWS bill.
Wasabi's flat rate and effectively-free restores fit backup and disaster recovery specifically better. It's S3-compatible, so it slots into the same backup software already pointed at S3 — NAKIVO, Veeam and most other backup platforms support it as a target with no application changes — and it removes the one variable that makes backup storage bills unpredictable, which is exactly the moment you're least equipped to absorb a surprise. It's also the option we recommend most often as the off-site, immutable copy in a 3-2-1-1 setup, precisely because the cost of testing that copy — actually restoring from it periodically, the way any Essential-Eight-aligned recovery plan should — doesn't change the bill.
Working it out for your own environment
The numbers above are illustrative, not a quote — run your own retention volume and expected restore frequency through both providers' current pricing before committing either way, since list prices move. If you're weighing Wasabi against S3 (or against Backblaze B2 or another S3-compatible target) as part of a broader backup and storage strategy, get in touch and we'll help you work through the maths for your actual data volumes rather than a generic worked example.