Mixvoip vs Cegecom: Which Business Phone Provider Should You Choose in Luxembourg?

Both Mixvoip and Cegecom can run a Luxembourg business phone system well, but they start from different places. Cegecom is a fibre and data centre operator that also sells business voice. Mixvoip is a voice specialist that also sells connectivity. That single difference shapes almost every practical choice below.

This guide compares them the way a telecom consultant would, not a brochure. The right answer depends on your company size, your current internet and mobile setup, the Cloud PBX features you actually need, how much you work across borders, and the support you expect.

Mixvoip is a Luxembourg operator that has provided business voice since 2008. Its core products are Cloud PBX, SIP trunks, business internet, and IT and security services across Luxembourg, Belgium, Germany, and France. It is regulated by the ILR and by the equivalent authority in each country it serves. Mixvoip positions itself as voice first. It offers a softphone for web, Windows, macOS, iOS, and Android, markets its telephony as independent of your internet provider, and publishes pricing for some services. It is widely described as the second largest fixed-line operator in Luxembourg. You can see the complete Mixvoip profile for the full breakdown.

Cegecom launched in 1999 as Luxembourg's first alternative to the incumbent. It is part of the artelis group, majority owned by the German utility group VSE, and serves B2B customers only. Its strength is infrastructure: more than 1,500 km of its own fibre across four countries, a low-latency Luxembourg to Frankfurt route, Tier III and Tier IV data centres, and ISO 9001, 14001, 27001, and 45001 certifications. For voice it offers Managed Com, a Cloud PBX in Business and Corporate tiers, Microsoft Teams through Operator Connect and Direct Routing, and SIP trunks. Its sales model is consultative and quote based, usually starting with an audit. The complete Cegecom profile has the full detail.

Each card covers one capability. Green marks a clear practical advantage for one side, amber means it depends on what you want, and grey means the two are broadly even.

The cards above show the what. These toggles cover the so what, the points that change how the system feels to run day to day.

For a freelancer or very small team, Mixvoip is the realistic choice, since Cegecom does not target the under-ten-user segment.

For an SME of 5 to 50 people, Mixvoip usually fits best for transparent entry, ISP independence, and a modern softphone. Cegecom is worth a look if you already buy its internet.

For a multi-site company across the Greater Region, either can work. Cegecom suits firms whose sites sit inside its fibre footprint and benefit from free internal calls. Mixvoip suits firms that want flexibility and a presence in all four countries.

For teams with many field or mobile workers, Mixvoip leads on its multi-platform softphone and mobile integration.

For a company already on Cegecom connectivity, Cegecom keeps everything in one contract. It is still worth comparing the all-in cost per user.

For advanced integrations or SIP trunk flexibility, Mixvoip is the stronger contact. For a public-sector or financial organisation that needs a dedicated platform, ISO 27001 hosting, and the Frankfurt route, Cegecom is a strong fit.

There is no universal winner. Mixvoip is usually the better first call when you want Cloud PBX flexibility, SIP and VoIP specialisation, clearer pricing, a modern softphone, and voice that does not depend on one internet supplier.

Cegecom is often the better first call when you already buy its connectivity or data centre services, want a single managed bundle, need the Luxembourg to Frankfurt route, or are standardising on Teams Operator Connect with a project-managed approach.

The practical move is to shortlist on your current infrastructure, the features you truly need, your numbering and cross-border needs, and your support expectations, then ask both providers the questions above and compare the written answers.