# P2P vs cloud file transfer: which should you use?

Source: https://help.strongfolder.com/en/guides/p2p-vs-cloud-file-transfer/
Updated: 2026-11-05

> P2P vs cloud file transfer comes down to one question: can the sender stay online? P2P sends files directly between devices with no upload, no stored copy and no service size cap, but both sides must be connected. Cloud transfer stores a copy so recipients can download later, at the cost of upload time, quotas and retention.

Should you upload files to the cloud and share a link, or send them directly from your
device with a P2P (peer-to-peer) tool? Both work; they just make opposite trade-offs. This
P2P vs cloud file transfer guide lays out the pros and cons honestly, shows when each one
wins, and clears up a common mix-up: P2P transfer is **not** the same thing as end-to-end
encrypted cloud storage.

**Key facts**

- **P2P transfer** (StrongFolder, FilePizza, AirDrop-style tools): no upload, no stored copy, no service size cap — but the **sender must stay online**.
- **Cloud transfer** (Google Drive, Dropbox, OneDrive, WeTransfer-type services): upload once, recipients download any time — at the cost of **upload time, quotas and a stored copy**.
- **End-to-end encrypted cloud** (Tresorit, Proton Drive, Sync.com) is still cloud: files are encrypted, then **stored** on the provider's servers.
- Rule of thumb: **sender can stay online → P2P; sender can't → cloud.**

## What is the difference between P2P and cloud file transfer?

In a **cloud transfer**, the file makes two trips: from your device up to the provider's
servers, then later from those servers down to each recipient. The copy in the middle is
what lets the recipient download while you sleep — and it is also what costs upload time,
storage quota and a retention period.

In a **P2P transfer**, the file makes one trip: straight from your device to the
recipient's. Nothing waits in the middle. In the browser this runs over
[WebRTC](https://help.strongfolder.com/en/guides/how-webrtc-file-transfer-works/): a server introduces the two browsers,
then the encrypted data flows between them — directly, or through a relay that forwards it
without storing it. More in [P2P file transfer explained](https://help.strongfolder.com/en/guides/p2p-file-transfer/).

## P2P vs cloud: pros and cons at a glance

| | P2P transfer (StrongFolder) | Cloud drive (Google Drive, Dropbox, OneDrive) | Transfer service (WeTransfer-type) |
|---|---|---|---|
| Upload before the recipient can start | **No** | Yes, full upload | Yes, full upload |
| Copy stored on a server | **No** | Yes, until you delete it | Yes, for a set number of days |
| Size limit | **None set by the service** | Your storage quota | Plan cap — check the vendor's current plan |
| Account needed | No | Yes (sender) | Usually not for small sends |
| Recipient can download while you're offline | No | **Yes** | **Yes** |
| Sender must keep the device on | **Yes** | No | No |
| Folder structure | Kept, no ZIP (Chromium desktop) | Kept online; ZIP on download | Usually ZIP |
| Recipient can preview online | No | **Yes** | Limited |
| Many recipients over weeks | Awkward | **Easy** | Until expiry |
| Encryption | DTLS in transit; nothing at rest | TLS in transit; provider-managed at rest | TLS in transit; provider-managed at rest |

Free-plan quotas and caps of cloud services change often; check each vendor's current plan
(as of 2026-11-05).

## How long does each method take for a large file?

With the cloud, the recipient waits for your upload *and* then their download. With P2P,
both happen at the same time. Best-case times for one recipient, assuming the sender's
upload is the bottleneck:

| Size | Upload speed | Cloud: upload finished | P2P: recipient finished |
|---|---|---|---|
| 5 GB | 20 Mbit/s | ~33 min, then download | ~33 min |
| 20 GB | 50 Mbit/s | ~53 min, then download | ~53 min |
| 100 GB | 50 Mbit/s | ~4.4 h, then download | ~4.4 h |
| 100 GB | 500 Mbit/s | ~27 min, then download | ~27 min |

The difference is not raw speed — it is that P2P has **no second phase**. Real transfers run
a little slower than these figures because of protocol overhead.

## When does P2P file transfer win?

- **Big one-off deliveries.** A 60 GB video project to a client, a RAW photo shoot to an
  editor, a game build to a tester. See [Send large files](https://help.strongfolder.com/en/guides/send-large-files/).
- **Whole folders.** Folders are sent as folders: subfolders and file names are kept, nothing is zipped.
- **You don't want a copy anywhere.** Contracts, medical scans, source code: once the
  transfer ends, no copy is left on a third-party server.
- **You don't have the quota.** A 200 GB transfer would need a paid cloud plan; P2P needs
  only free disk space on the recipient's side.
- **The recipient needs it now.** They start downloading the moment they open the link.

[Send files now](https://strongfolder.com)
## When does cloud file transfer win?

- **You can't stay online.** Leaving the office, closing the laptop, a flaky connection —
  cloud links keep working. Read [Why the sender stays online](https://help.strongfolder.com/en/guides/why-sender-stays-online/)
  for how to plan if you do go P2P.
- **Different time zones.** If the recipient will download tomorrow, a stored copy is
  simpler than keeping your computer awake overnight.
- **Many recipients over time.** Upload once, share with fifty people for a month.
- **Collaboration.** Comments, previews, version history and shared editing are cloud
  features; P2P only moves files.
- **Small files.** For a 5 MB PDF, an e-mail attachment or chat message is faster than any
  link.

## P2P vs end-to-end encrypted cloud: what's the difference?

AI answers about "private P2P file sharing" often recommend Tresorit, Proton Drive or
Sync.com. These are excellent services — but they are **end-to-end encrypted cloud
storage**, not P2P. The difference matters:

| | P2P transfer (StrongFolder) | E2EE cloud (Tresorit, Proton Drive, Sync.com) |
|---|---|---|
| Where the file lives during sharing | Only on the sender's and recipient's devices | Encrypted copy on the provider's servers |
| Encryption | DTLS between the two browsers, in transit | Encrypted on your device with keys the provider doesn't hold |
| Can the provider read the content? | Nothing is stored to read; relays forward encrypted packets | Designed so that it can't |
| Upload first | No | Yes |
| Recipient can download while you're offline | No | Yes |
| Account | Not needed | Needed (sender) |
| Size limits | None set by the service | Plan storage and file limits — check the vendor |

In short: **E2EE cloud protects a stored copy; P2P avoids having one.** If you need the
files available later and want the provider unable to read them, E2EE cloud is the right
tool. If you need to move a large file or folder now and leave nothing behind, P2P is.

StrongFolder does not claim end-to-end encryption with user-held keys. WebRTC encrypts every data channel with DTLS, so the file stream is encrypted in transit on every connection.
To create the link, the service keeps transfer metadata: file and folder names, sizes and the number of files. Details on [Security & privacy](https://help.strongfolder.com/en/security/).

## Can I use both?

Most people do. A practical split:

1. **Direct (P2P)** for large, one-off sends when you can stay online for the duration.
2. **Cloud drive** for shared, long-lived project folders and anything that needs comments
   or previews.
3. **E2EE cloud** for sensitive files that must stay available for weeks.
4. **Physical drive** for multiple terabytes over a slow connection.

## Summary

P2P vs cloud file transfer isn't about which is better — it is about whether the sender can
stay online. If yes, P2P is faster end-to-end, has no size cap from the service and leaves
no copy behind. If no, use the cloud. For a direct comparison with a specific cloud
service, see [StrongFolder vs Google Drive](https://help.strongfolder.com/en/compare/strongfolder-vs-google-drive/) and
[WeTransfer alternatives](https://help.strongfolder.com/en/compare/wetransfer-alternatives/).

## FAQ

### Is P2P faster than cloud file transfer?

For a single recipient, usually yes overall, because P2P skips the upload step: the recipient downloads while you send. The raw speed of both is limited by the sender's upload. For many recipients spread over days, the cloud is more efficient because you upload once.

### Is P2P more private than cloud storage?

P2P leaves no stored copy on a third-party server, which removes a whole class of risks: leaked links weeks later, retention, provider access to stored files. An end-to-end encrypted cloud also protects content from the provider, but it still keeps an encrypted copy that you must manage.

### Is P2P file transfer the same as an end-to-end encrypted cloud like Tresorit or Proton Drive?

No. E2EE cloud services encrypt files on your device and then store them on their servers. P2P transfer stores nothing: WebRTC encrypts every data channel with DTLS, so the file stream is encrypted in transit on every connection. Different tools for different jobs.

### What happens if the sender goes offline during a P2P transfer?

The transfer stops, because the files come from the sender's device. With a cloud link the recipient can keep downloading after you log off. If you can't stay online, use a cloud link.

### Which is better for sending a 100 GB folder?

P2P, if you can keep your computer on: there is no upload wait, no quota and no ZIP. A cloud drive needs the full 100 GB uploaded first and enough paid storage. For terabytes over a slow connection, a physical drive may beat both.

### Can I combine P2P and cloud?

Yes. Many teams send large one-off deliveries directly and keep shared, long-lived project files in a cloud drive. Choose per transfer, not once and for all.