Last updated: 2026-07-09
Nextcloud turned self-hosting into a real alternative to Google Drive or Dropbox: your own files, your own sync across every device, your own calendar and contacts, all under a domain you control. It's genuinely powerful software, and if what you want is a permanent home for your files, Nextcloud is the right tool for the job.
This article compares the two fairly. Nextcloud is built to store your data indefinitely and keep it in sync — that scope is its strength, and it comes with real setup and maintenance: a web server, a database, a PHP runtime, and ongoing updates for the platform and its apps. Relayium solves a narrower problem: getting a file from one person to another, either directly with nothing stored at all, or through a link that expires. If you need durable cloud storage, Nextcloud is the better fit. If you just need to move a file, Relayium is lighter.
Nextcloud is a complete self-hosted cloud suite: file storage with desktop and mobile sync clients, calendars, contacts, an office suite, chat, and a large app ecosystem on top. Once it's running, it behaves like a private Google Workspace — files live there permanently, sync automatically across devices, and stay available whenever you need them.
That's a genuinely different job than sending a file. Nextcloud is the right choice when you want a permanent, shared home for your data: a team drive, a photo library, a place your household or company keeps files long-term.
Because Nextcloud does so much, running it means running a real application platform: a web server, a database (MySQL, PostgreSQL, or SQLite), a PHP runtime, scheduled cron jobs, and periodic updates to the core and whichever apps you've installed. That's a fair trade for everything you get, but it's ongoing work, and you're the one planning storage capacity for everything you keep there.
Relayium doesn't try to be a storage platform. It's scoped to moving files from one place to another — realtime peer-to-peer, or a link that expires. Its self-hosted server is a single container: one Go binary that serves the app and keeps a small SQLite database plus, for stored links, encrypted blobs it cannot read. That command is the whole setup; an optional profile adds a TURN relay for cross-network NAT traversal. If all you need is to get a file from A to B, that's a lot less to run and keep updated.
docker compose up -d --buildRelayium's realtime mode sends files straight between two devices over an encrypted peer-to-peer channel — Nextcloud has no equivalent, since every Nextcloud share is uploaded to and downloaded from your server. An X25519 key exchange derives a key for AES-256-GCM, both devices show a matching 6-digit verification code (SAS) to rule out a man-in-the-middle, and each file is checked end-to-end with a SHA-256 hash.
On the same network this needs no account at all: open relayium.com on both devices, pick up to 1,000 files, verify the code, and send. Sending across networks with a pairing code requires the sender to sign in — the recipient never needs an account. If a connection drops mid-transfer it resumes instead of restarting, and when a direct path isn't possible it falls back to an encrypted TURN relay that only ever sees ciphertext.
Realtime transfer needs both people online at once, which is where Nextcloud's always-on server has a real edge. Relayium covers that case too, without giving up privacy: your browser generates a random AES-256-GCM key, encrypts the files with it before anything leaves your device, and the key lives only in the URL fragment — the part after the # that browsers never send to a server. The server stores ciphertext it cannot decrypt.
Creating a stored link requires the sender to sign in; the recipient needs no account to download. Each link can be set to expire after 1 hour, 1 day, 3 days, or 7 days, or to burn after the first complete download — it isn't meant to be a permanent home for the file like a Nextcloud share, it's meant to disappear.
The differences that matter most, side by side:
If you want a permanent, synced home for your files — photos, documents, a shared team drive — yes, that's exactly what Nextcloud is built for. Relayium isn't a replacement for that; it's for the narrower job of getting a file from one person to another, quickly and privately.
No. In realtime mode nothing is stored anywhere — the file goes directly between devices. Stored links keep zero-knowledge ciphertext only until they expire (1 hour to 7 days) or are downloaded once with burn-after-read, not indefinitely like a Nextcloud share.
On the same network, no. Sending across networks with a pairing code, or creating a stored link, requires the sender to sign in; the recipient never needs an account. Nextcloud requires an account (or a share link from one) for every user who accesses it.
Yes. Unlike Nextcloud's multi-service stack, Relayium's server is a single container: one docker compose command runs the whole thing, with an optional TURN relay profile for cross-network NAT traversal.
Yes — free and open source under the MIT license, with no paid tier. Nextcloud's core server software is also free and open source; some hosting and support options from Nextcloud GmbH are paid.
Send a file directly, or share a zero-knowledge link that expires — no cloud storage account required on the same network.
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