Nasuni

Cloud file storage that keeps the authoritative copy in object storage and caches it at each site

As of 31 August 2026, Nasuni's pricing is not published; the vendor quotes on request. Replaces file servers and their backup with edge caches in front of a single versioned copy held in your own object storage. Softwr lists it under File Storage. Nasuni is made by Nasuni Corporation, available on Web, Windows, VMware, Hyper-V.

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Overview

What Nasuni does

Nasuni is a cloud file services platform. Instead of file servers with their own storage and a separate backup system, each site runs an edge appliance that caches active files, while the authoritative copy of every file lives as versioned objects in customer owned object storage such as Azure Blob or Amazon S3. The filesystem, UniFS, keeps continuous versions rather than nightly backups, and global file lock coordinates writes when several sites open the same file. The distinguishing property is what happens after a failure. Because the appliances hold only cache and the truth sits in object storage, a destroyed site is recovered by standing up a new appliance and pointing it at the same volume, with files served on demand as they are requested rather than after a full restore. That collapses file server, backup, disaster recovery and offsite replication into one subscription line, which is the commercial argument and the reason it displaces backup products as often as it displaces NAS hardware. Buyers are distributed organisations with heavy unstructured data and many offices: engineering, architecture, construction, media and manufacturing. The trade-off is that you are renting a caching layer over storage you also pay for, so cold reads that miss the cache go to the cloud at cloud latency, and the object storage transaction and egress charges underneath belong to you rather than to Nasuni.

What people use it for

Consolidating file servers across many branch offices onto one namespace without shipping data between sites
Replacing a NAS plus backup plus offsite replication stack with a single recovery model
Engineering or media teams in different regions who need to work on the same large project files
An organisation that has been hit by ransomware on file shares and needs version level rollback rather than tape restores

Where it falls short

Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Nasuni.

Subscription is based on managed capacity, so cold data that would cost almost nothing in an archive tier keeps paying the full platform rate, and there is limited incentive structure to delete.
Every site needs an appliance, virtual or physical, which is a footprint and a patching obligation at locations that previously had only a file server or nothing.
A read that misses the local cache is fetched from object storage, so the first access to a cold large file is at cloud latency and users experience it as the system being slow at random.
Global file lock serialises access across regions, so genuinely collaborative editing of the same large files still involves waiting for another site to release the lock rather than merging.
The object storage underneath is your contract, so API transaction and egress charges from Azure or AWS land on your cloud bill and are not covered by the Nasuni subscription you were quoted against.

Cross-shopped

What people choose instead of Nasuni

Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.

Nasunivs
Egnyte
Egnyte: Closer to a content collaboration product with a stronger user facing layer and less of a NAS replacement story
Nasunivs
Nextcloud
Nextcloud: Self hosted and far cheaper if the requirement is file sync and share rather than replacing site file servers
Nasunivs
Citrix ShareFile
Citrix ShareFile: If the driver is external file sharing and workflow rather than consolidating branch office file servers

Pricing

What Nasuni costs

Taken from the vendor's own pricing page. Prices move, so check before you buy.

Nasuni File Data Platform

On request

Subscription based on managed capacity
Edge appliances at each site
Continuous versioning and rapid recovery
Object storage costs billed separately by the cloud provider

Capabilities

Features

Edge caching appliances
Virtual or hardware appliances at each site serve active files at local speed
Object storage back end
The authoritative copy lives in customer owned S3 or Azure Blob storage
Continuous versioning
Snapshots are taken continuously rather than nightly, so recovery points are minutes apart
Global file lock
Coordinates write access when multiple sites open the same file
Rapid site recovery
A replacement appliance serves files on demand rather than waiting for a full restore
Ransomware detection
Flags anomalous write patterns and identifies a clean version to roll back to

Answered, with sources

Questions people ask

Each answer names the page it came from, so you can check it rather than take our word for it.

Do I still need a backup product?

That is the pitch: continuous versioning in object storage replaces the backup schedule for file data. Databases and virtual machines still need their own tooling.

Who owns the storage account?

You do. Nasuni writes into object storage you contract for, which also means the cloud provider bills you directly for it.

How fast is recovery of a whole site?

An appliance can be serving files within hours because data is pulled on demand, but performance stays degraded while the cache refills.

Is pricing published?

No. Nasuni sells through quotes based on managed capacity and site count, so comparisons need a real proposal rather than a list price.

Keep looking

Where to go from Nasuni

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Softwr does not host reviews and shows no star rating for Nasuni, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.

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