NebulaSSH vs Termius
Termius is a well-built cross-platform SSH client with cloud sync across the devices you install it on. NebulaSSH covers similar ground without the install step, and adds remote desktops and connector agents to the same account.
Both products solve the problem PuTTY leaves open: your host list should follow you rather than live on one computer. Termius does it by syncing between copies of an app you install on each desktop and phone. NebulaSSH does it by keeping the session in the browser, so a machine you have never used before is one login away from your fleet.
That difference decides most evaluations. If you always work from your own devices, an installed app is comfortable and works offline. If you regularly find yourself on a locked-down work laptop, a client's machine, a Chromebook or a borrowed desktop, the install requirement is the whole problem.
The feature sets diverge past the terminal. Termius concentrates on SSH, SFTP and port forwarding across desktop and mobile. NebulaSSH adds a VNC remote desktop in the same tab, command macros you can fire at a group of machines, and connector agents for Windows, Linux, ARM64 and Android that dial out from the target so hosts behind NAT stay reachable.
Side by side
| Capability | NebulaSSH | Termius |
|---|---|---|
| Install required | None — runs in the browser | An app on each desktop and mobile device |
| Locked-down or borrowed machines | Works — a browser is enough | Needs rights to install the app |
| Host list follows you | Stored in your account | Cloud sync between your installed apps |
| Offline access to your host list | No — it is a web app | Yes, the app holds it locally |
| SFTP file manager | Built in, beside the terminal | Built in |
| VNC remote desktop | Included from the Professional plan | Focused on SSH, SFTP and port forwarding |
| Machines behind NAT | Connector agent dials out — no port forwarding | Port forwarding, a jump host or a VPN |
| Native mobile app | Android client app | First-party iOS and Android apps |
When Termius is the better choice
No tool wins everywhere. Stay with Termius if any of these describe you:
- You want a native desktop app and offline access to your saved hosts.
- You work mainly from a phone or tablet and want a first-party iOS app.
- You depend on Termius-specific workflows such as its port-forwarding interface.
- You prefer a client with no server component holding your session.
Common questions
Why choose a web SSH client over an installed app?
Because the machine stops mattering. There is nothing to install, update or re-configure, so a locked-down laptop, a shared workstation or a Chromebook gets you the same terminal and the same saved hosts.
Does NebulaSSH work on mobile?
The web app works in a mobile browser, and there is an Android client app. There is no first-party iOS app today.
Can NebulaSSH reach machines an installed client cannot?
Often, yes. A normal SSH client needs a route to the host. The NebulaSSH connector agent dials out from the target machine instead, so home servers, lab boxes and hosts behind corporate NAT stay reachable without a VPN.
Do I lose my saved hosts if I stop using it?
No. Saved connections can be exported, so your host list is not trapped in the product.
Try it on a machine you are sitting at
Open a browser, sign in, add a server. Nothing to install — and nothing left behind if the machine is not yours.