# Fyle vs Mountain Duck

Mountain Duck mounts S3, SFTP and other storage as a drive on Mac and Windows, using storage you already have. Our research found no versioning or agent layer of its own. Fyle plans to add versions with attribution, agent sessions and review on top of storage.

Last checked: October 2026. Fyle is in development. Built so far: accounts, organisations with roles, two-factor sign-in, organisation security policies, and device sign-in for the desktop app and CLI. The drive, agent sessions and review are planned and not available yet.

## At a glance

| | Mountain Duck | Fyle |
| --- | --- | --- |
| Desktop drive for ordinary apps | Yes. Mounts storage as a drive on Mac and Windows. [1] | Mounts as an ordinary folder in Finder (macOS), File Explorer (Windows) and a FUSE mount (Linux). Files download when opened and are cached. (Planned: desktop launch) |
| Agent access | None. [1] | Agents work in the mounted folder like any program. `fyle agent claude` (or any other command) runs one in its own session folder. A CLI and an MCP server cover remote agents, under the same permissions as people. (Planned: agent layer) |
| Conflicting edits | Not covered by our research | A save based on an older version becomes a branch. Nothing is overwritten, dropped or turned into a conflicted copy. (Planned: desktop launch) |
| Human review of agent changes | No versioning or agent layer of its own. [1] | A named reviewer keeps the current version, takes the branch or keeps both. Rules decide who reviews which folders. (Planned: review) |
| Windows | Yes. [1] | Windows is a launch platform, alongside macOS and Linux. (Planned: desktop launch) |
| Bring your own storage | Yes. S3, SFTP and other storage you already have. [1] | Bring your own S3-compatible bucket: AWS S3, Google Cloud Storage, Cloudflare R2, MinIO or Ceph. (Planned: Enterprise) |
| UK data residency | Wherever your own storage is. [1] | UK-only workspaces: your UK bucket plus a UK-hosted coordinator and database. (Planned: Enterprise) |
| Version history | No versioning layer of its own. [1] | Every version records the person, device and agent session behind it, and any version can be restored. Retention per plan is not final. (Planned: desktop launch) |
| Published price | Per-seat licence. We could not verify the price. [1] | Personal, Team and Enterprise plans, priced per person with storage included; no free tier or trial. [See pricing](https://fyle.sh/pricing) (Draft, not on sale) |

## Where Mountain Duck is stronger

- Works on Mac and Windows today. [1]
- Mounts storage you already have, including S3 and SFTP. [1]
- Your data stays wherever your storage is, so residency is your choice. [1]

## Where Fyle differs

- Fyle plans a coordinator that keeps immutable versions and records who or which agent made each one.
- Fyle plans agent sessions, an MCP server and review, which a plain mount doesn’t provide.
- Fyle plans Linux as well as macOS and Windows.

## Which to choose

### Choose Mountain Duck if

- You want a desktop mount for S3 or SFTP storage you already run.
- You don’t need shared versions, attribution or review.
- A per-seat desktop licence suits you better than a subscription with storage.

### Choose Fyle if

- Several people and agents write to the same files and you need versions and review.
- You need to know which agent changed which file.
- You also need Linux.

## Questions

### How much does Mountain Duck cost?

It is sold as a per-seat licence. Our October 2026 research could not load its pricing page, so we have not verified the price.

### Does Mountain Duck work with AI agents?

Our research found no agent features. Any program can read the mounted drive, but there are no agent sessions, versions or review of its own.

### Is Fyle available now?

Fyle is in development. Built so far: accounts, organisations with roles, two-factor sign-in, organisation security policies, and device sign-in for the desktop app and CLI. The drive, agent sessions and review are planned and not available yet.

### Where do these facts come from?

Competitor facts come from our October 2026 review of 50 products, and each one links to the page it was taken from. Prices are as published, in the vendor’s currency. We recheck these pages and correct anything that has changed.

## Sources

Last checked: October 2026.

1. [Mountain Duck homepage](https://mountainduck.io/)

Not verified:

- Price: the pricing page did not load during our October 2026 research.