
from 6,90 € / per user, monthly
Your cloud phone system – as flexible as you are

Your cloud phone system – as flexible as you are
With VoIP from oneCorp, you get a complete solution for your business communications
Setting up and managing a cloud phone system requires in-depth expertise. While the finished phone system is simple and intuitive for you to use, the setup involves a complex configuration process. Our experts handle the entire setup for you – fast, reliable, and tailored to your requirements.
We're there for you after go-live, too. Just as your business evolves, your communication solutions need regular adjustments. Whether it's new employees, changed call routing, or additional features – we take care of every configuration and adjustment so your phone system stays perfectly aligned with your business at all times.


Our strength lies not only in the technology, but in the service.
With our managed VoIP solution, we handle the complete management of your phone system for you.
Consulting, setup, number porting, configuration, ongoing support & optimization are already included. You get a fully managed cloud phone system – not just a license.


A cloud phone system pays off if you...
Getting started with your new cloud phone system is easy
A cloud phone system – also called a VoIP or IP phone system – moves your entire business telephony to the internet. Instead of expensive hardware in your server room, the system runs in a German data center. You make calls from anywhere via laptop, smartphone, or IP phone and pay a predictable per-user rate instead of paying for rigid hardware.
With VoIP (Voice over IP), your calls are transmitted as data packets over your existing internet connection – a separate ISDN or analog line is no longer needed. New users, phone numbers, or locations can be added in minutes. oneCorp handles setup, migration, and maintenance for you as a fully managed service.
Since the ISDN shutdown, VoIP has become the standard for business telephony. Switching to a cloud phone system pays off – here are the key differences at a glance:
On-site consulting in Heidelberg, Neckargemünd, and Düsseldorf. Looking for just the technology without ongoing management? See the Placetel solution.
A cloud phone system no longer sits as hardware in your office; it runs in a data center instead. Calls travel over the internet (VoIP), so you can use the system from anywhere via app, laptop, or IP phone.
VoIP converts speech into data packets and transmits them over your existing internet connection. A separate ISDN or analog line is no longer required.
At oneCorp, plans start at 6,90 € per user, per month (plus VAT), available from 2 users. There are three plans – from the pure cloud phone system, to a version with an all-net flat rate, up to a flat rate including video meetings.
Location-independent calling, call forwarding, call queues and voice menus (IVR), integration with tools like MS Teams, HubSpot, or DATEV, easy scalability, and secure operation from German data centers.
An existing internet connection, devices (IP phones, headsets, or a softphone app), and optionally your existing phone numbers to port over. oneCorp handles the entire setup.
Yes. oneCorp handles porting your existing phone numbers – you stay reachable at the numbers you already use.
Your VoIP solution consists of two separately billed components: the telephony license is provided directly by Placetel, while the managed service (setup, management, and support) is billed by oneCorp. This keeps the license and the service transparently separate.

Get a no-obligation consultation. Together, we'll find the ideal communication solution that fits you and your business perfectly.