Zivver
Virtru
Kiteworks
FileCap
Secure Send
Voltage SecureMail
Built for today: safer digital communication, sender identity, and proof-backed delivery.
LayerStack’s Arm-based cloud virtual machines, powered by cloud-optimized CPU based on Arm architecture that deliver excellent cost-effective processing power, allowing you to easily complete the most demanding application development.

Website, pricing, platforms and company facts side by side.
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4G
44G.ai
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LSA
LayerStack Arm-based Cloud Server
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| Website | 44g.ai | layerstack.com |
| Pricing | — | |
| Company | Startup from Česko · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.
44G Envelope is a system for the secure sending and secure pickup of digital messages and office documents. The email carries only instructions and a security code. The recipient buys nothing, registers nothing, and securely picks up the content after verification. It is not regular email and not...
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