Hi,

I’ve been using Termius for years, but I’m tired of proprietary tools locking my host data and hiding basic features like cloud sync and multi-exec behind a subscription. I wanted an open-source alternative that didn't compromise on modern UI/UX or advanced features, specifically true SFTP with drag-and-drop and host-to-host transfers.

So for the past few months, I've been building my own: Voltius

It's built with Rust + Tauri + React, it has a modern UI, tiny footprint (\~30MB) and genuinely fast. No accounts required, no features locked behind a paywall, and the sync backend is fully self-hostable with zero vendor lock-in.

Zero vendor lock-in:
I made Voltius "easy in, easy out". You can import your data from Termius and MobaXterm, and if you ever want to leave, you can export your data as plain or encrypted JSON.

Cloud Sync:
I didn't want to lock cloud sync behind a paid subscription, so I've built a GitHub Gist plugin for sync, which is free and E2EE. You bring your own GitHub token, and the app derives an encryption key using Argon2id. Only encrypted data is sent to GitHub, ensuring your credentials remain completely secure.

I've also built a real-time, conflict-free cloud E2EE sync relay. I offer a paid hosted version strictly for teams features (RBAC, live shared terminals...) but you can self-host your own relay! Everything is open-source, so you can spin it up on your own infrastructure and have real-time sync across your devices for free.

A short glimpse of what's inside today:

• 🔌 Serial Console
• 📂 SFTP with drag & drop (host↔host, host↔local)
• 🐋 Docker Integration (Proxmox coming soon)
• 🧩 Plugin system & TypeScript API 📊 Live System Metrics
• ✂️ Snippets & Multi-Exec
• 🪟 Split Panes & Broadcast input
• ⚙️ Process Manager
• And much more...

The Beta is available now on Windows, Linux, and macOS (mobile coming soon, waitlist on website).

Website: https://voltius.app
Docs (WIP): https://docs.voltius.app
Source Code (AGPLv3): https://github.com/VoltiusApp/voltius

PRs and issues are very welcome. Would love feedback from Linux users.