Mixvoip vs Tango: Which Business Phone Provider Should You Choose in Luxembourg (June 2026)?

Mixvoip vs Tango: Which Business Phone Provider Should You Choose in Luxembourg (June 2026)?

Mixvoip is a full-stack Luxembourg operator. It runs Cloud PBX (Voxbi), SIP trunking, business internet across Luxembourg, Belgium, Germany, and France, mobile, IPTV, IT services, and cybersecurity. It is ILR-licensed and has operated since 2008. Tango is Luxembourg's second-largest telecom operator and part of the Belgian Proximus Group. It is best known for consumer mobile and fibre. Its business phone product, Fix4Bizz, is a single-tier hosted exchange built for the self-employed and very small offices.
The right choice depends on a few practical things: how many people you have, whether you want your phone system tied to one provider's internet line, how many call features your team actually uses, whether you have staff across borders, and how you want support handled when something breaks.
✅ Choose Mixvoip if you need real call features (IVR menus, queues, call recording, analytics), a softphone for both desktop and mobile on any network, Microsoft Teams calling, documented CRM integrations and an API, numbers across Luxembourg, Belgium, Germany, and France, and a phone system that works over any internet line.
🏢 Choose Tango if you are a Luxembourg-only business of 1 to 10 people, you already buy Tango fibre and mobile and want a single Tango invoice, and you only need basic landline features at the lowest published entry price.
There is no single winner here. The better provider depends on your existing infrastructure, the features you need, and how you want support.

Who each provider is

📡 Mixvoip

Mixvoip is a Luxembourg-based operator that delivers a full stack of services: Cloud PBX through Voxbi, SIP trunking, business internet in four countries, mobile, IPTV, IT, and cybersecurity. It is regulated by the ILR and targets small and medium businesses that want enterprise features without enterprise complexity. Read the full profile at Mixvoip on pbx.lu.

📞 Tango

Tango is a brand of Proximus Luxembourg, the local subsidiary of the Belgian Proximus Group. It has been on the market since 1998 and reports around 280,000 customers across mobile, fibre, TV, and landline. Its business phone product, Fix4Bizz, costs 9.90 EUR per workstation per month and is scoped to companies with fewer than 10 employees. Read the full profile at Tango on pbx.lu.

How they compare, point by point

💶 Pricing transparency
📞 Tango: ⚠️ The 9.90 EUR seat price is published and easy to find, but add-ons like inclusive calling, the mobile app, hardware, and per-minute rates are spread across other pages.
📡 Mixvoip: ✅ Publishes itemised business pricing, which makes the full monthly cost easier to model upfront.
☎️ Cloud PBX features
📞 Tango: ⚠️ Covers the basics well: voicemail, forwarding, call pickup groups, call cascade, and a simple auto-attendant. Good enough for a small office.
📡 Mixvoip: ✅ Adds multi-level IVR, call queues, call recording, and analytics on top of the basics.
📱 Softphone and apps
📡 Mixvoip: ✅ Desktop and mobile softphones that work over any network.
📞 Tango: ⚠️ The Bizz2Go app extends the business number to a phone, but it runs over Tango's mobile network and needs a Tango SIM for each user. No desktop softphone is listed.
🟦 Microsoft Teams
📡 Mixvoip: ✅ Connects Teams to real phone numbers, so users call from inside Teams.
📞 Tango: ❌ No public evidence of Microsoft Teams Phone integration on the Fix4Bizz page.
🌐 ISP independence
📡 Mixvoip: ✅ Works over any compliant internet line in Luxembourg and the Greater Region.
📞 Tango: ❌ Fix4Bizz requires a Tango internet connection. It does not run on another provider's line.
🔗 CRM and automation
📡 Mixvoip: ✅ Publishes a CRM integration list and a documented API.
📞 Tango: ❌ No CRM connectors or API listed on the Fix4Bizz page.
🧩 SIP trunks
📡 Mixvoip: ✅ Offers SIP trunking for businesses that keep their own PBX.
📞 Tango: ⚠️ Not offered under the Tango brand; larger needs are handed to Proximus NXT.
🗺️ Greater Region calling
📡 Mixvoip: ✅ Local numbers in Luxembourg, Belgium, Germany, and France in one system.
📞 Tango: ❌ Fix4Bizz is Luxembourg-only. Remote stations are valid in Luxembourg only.

Practical differences that matter

🌐 Your phone system is tied to your internet provider
With Tango, the phone system and the internet line come together: Fix4Bizz only works on a Tango connection. If you change ISP, you change phone system too. Mixvoip keeps the two separate, so you can pick the best internet line for your office and keep the same phone system either way.
💶 The 9.90 EUR headline is the seat, not the bill
The 9.90 EUR per workstation covers the seat. Inclusive calling, the Bizz2Go app, desk phones, activation, and per-minute calls outside the pack are billed separately. For a typical 10-person office, the real per-user cost usually lands well above the headline. Ask for an all-in monthly figure before you compare.
🟦 Microsoft Teams calling works differently
If your team lives inside Microsoft Teams, the key question is whether you can make and receive normal phone calls from Teams. Mixvoip supports this. There is no public sign that Fix4Bizz connects to Teams Phone today, so a Teams-first business should confirm this directly.
📈 Growing past 10 employees changes the conversation
The Tango brand is scoped to businesses under 10 employees. Larger companies are referred inside the group to Proximus NXT, which is a different team, contract, and price book. Mixvoip is built for the 10 to 200 range, so growth does not force a brand change.

Strengths and limits

💪 Where Mixvoip is strong
Full-stack operator: Cloud PBX, internet in four countries, mobile, IPTV, IT, and cybersecurity. Deep call features, multi-country numbers, ISP-agnostic deployment, documented integrations and API, and a support model built for SMEs.
⚠️ Where Mixvoip has limits
Mixvoip layers its services over a multi-backbone partner network. It does not own a national fibre backbone or its own Tier III and Tier IV data centres, the way the largest infrastructure operators do. A buyer who wants the access line and the voice service from one owned network may weigh that.
💪 Where Tango is strong
One of the lowest published entry prices in Luxembourg. Owned 5G mobile network for tight fixed-mobile bundling, one-bill simplicity across fibre, mobile, and phone, a 25-year local brand backed by Proximus Group, and two redundant Luxembourg data centres.
⚠️ Where Tango has limits
A short feature list (seven items), a brand scope capped at under 10 employees, Luxembourg-only remote stations, a best experience that assumes Tango fibre, and no published SLA on the Fix4Bizz page.

Which provider fits which company?

A freelancer or very small Luxembourg office that already uses Tango for mobile and internet, and needs only voicemail and forwarding, is a sensible fit for Fix4Bizz on a single invoice.
An SME of 5 to 50 people that wants call recording, queues, analytics, or CRM links will outgrow the Fix4Bizz feature list quickly, and Mixvoip fits better.
A multi-site or Greater Region company with staff in Belgium, Germany, or France needs local numbers in each country from one system, which Fix4Bizz does not provide and Mixvoip does.
A team of mostly mobile or field workers can use Bizz2Go if everyone is on a Tango SIM; Mixvoip works with any mobile carrier.
A business already buying Tango connectivity gets real convenience from one supplier, as long as the feature needs stay basic and Luxembourg-only.
A company that needs advanced integrations or SIP trunks should look at Mixvoip, since those sit outside the Tango brand.
A public-sector or enterprise buyer is steered inside Proximus to Proximus NXT, not Tango; Mixvoip can offer a vendor-neutral SME-grade alternative.

Before you sign, ask both providers

💶 Cost and contract
What is the all-in monthly cost per user, including inclusive calling, the mobile app, hardware, and activation? What is the contract length and the early-exit fee?
🛠️ Features and setup
Which of these are included and not extra: IVR, call queues, call recording, analytics, CRM integration, an API, and Microsoft Teams calling? What is the setup and number-porting process?
📞 Support and growth
Who answers when a business issue hits, in which languages, and inside what hours? Is there a written SLA? What happens to the contract if the company grows past 10 employees?

The verdict

Tango Fix4Bizz is a fair choice for a 1 to 10-person Luxembourg-only business that already uses Tango fibre and mobile, wants one invoice, and needs only basic landline features at the lowest published seat price. Its limits are scope and depth, not quality.
Mixvoip fits a 5 to 200-person business, anywhere in the Greater Region, that needs richer call features, multi-country numbers, Teams or CRM integration, and a phone system that does not depend on which internet line powers the office. Match the provider to your size, your features, and your borders, not to the headline price.
Information checked in June 2026 against each provider's public materials. Telecom products and pricing change, so confirm current details before signing.

Frequently asked questions

Is Mixvoip more expensive than Tango's 9.90 EUR seat?
On the headline seat, Tango is cheaper. But the 9.90 EUR covers only the workstation. Once inclusive calling, the mobile app, hardware, activation, and per-minute calls are added, the real per-user cost rises. Compare an all-in monthly figure from both, not the sticker price.
Can Tango Fix4Bizz connect to Microsoft Teams?
There is no public evidence that Fix4Bizz integrates with Microsoft Teams Phone as of mid-2026. If Teams calling matters, confirm it with Tango directly. Mixvoip supports Teams calling with real phone numbers.
Can I keep my Yealink phones if I move from Tango to Mixvoip?
In most cases, yes. Yealink desk phones use the SIP standard and can usually be reconfigured for another Cloud PBX provider. A migration specialist can confirm your specific models.
Does Tango give my Belgian or German staff a local number?
No. Fix4Bizz does not provide local numbers for Belgium, Germany, or France, and its remote stations are valid in Luxembourg only. Mixvoip offers numbers across all four countries in one system.
What happens to my Tango plan if my company grows past 10 employees?
The Tango brand is scoped to businesses under 10 employees. Larger companies are usually referred inside Proximus to Proximus NXT, which is a separate quote, team, and contract. Mixvoip serves the 10 to 200 range directly.
📚 Keep exploring
Read the full profiles for Mixvoip and Tango, browse all providers, look up Cloud PBX and fixed-mobile convergence in the glossary, see the feature guides, or check the FAQ.
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