Cloud PBX for Businesses in Luxembourg (2026 Guide)
Build a shortlist of three providers in under five minutes.
19 Cloud PBX providers operate in Luxembourg and the Greater Region. This page narrows them to three picks based on what matters most to your business. Vendor-neutral, updated for 2026.
📅 Talk to an expert about your shortlist
Free 30-minute consultation with a local Cloud PBX consultant. We review your picks, answer your questions, and help you avoid the common procurement traps.
How to use this page
💡 Two ways in, same data. Pick the lens that matches how you think.
For the full provider list, the comparison criteria, and the underlying research, see the providers section and features overview.
Choose by what matters most
💡 How this works. Each section below covers one priority. The question is in the heading, the three picks follow. Skim the headings to find what matters to you, then read the reasoning underneath.
💶 I want to see prices upfront · Voxbi · Tango · Post Telecom
Most Luxembourg operators use a quote-only model, which makes early-stage cost comparison difficult. The three providers above publish at least some pricing openly.
Why these three: Voxbi publishes a full price list on its website, including Cloud PBX user pricing and add-on rates. Tango publishes Fix4Bizz bundle pricing alongside its mobile and internet packages. Post Telecom displays public pricing for its small-business voice products.
Worth knowing: Tango and Post Telecom typically display only the bundle headline price; line-item costs (extra users, recording, integrations) often require a quote. Voxbi displays per-user, per-feature pricing. For deeper transparency, you can also check Mixvoip, which publishes SIP trunk and Cloud PBX pricing on its website. Smaller LU operators like Visual Online, Eltrona, and Luxembourg Online tend to bundle voice with their internet packages, with bundle-level pricing only.
🌍 Greater Region numbers · Mixvoip · DEEP Telecom · Cegecom
For businesses with offices, staff, or customers in Belgium, Germany, or France in addition to Luxembourg. These three offer phone numbers across multiple Greater Region countries from one account.
Why these three: Mixvoip is Luxembourg-licensed and provides numbers in LU, BE, DE, FR, and several other countries from a single Mixvoip account. DEEP Telecom operates carrier infrastructure and supports cross-border numbering through international partner agreements. Cegecom covers the Greater Region for B2B customers via its parent group's wider European footprint.
Worth knowing: Most Luxembourg-only operators (Tango, Post Telecom, Visual Online, Eltrona, Luxembourg Online) provide LU numbers only. If you need cross-border coverage, you would have to use a second provider for non-LU numbers, which adds cost and complexity. International operators such as Orange Business and Proximus NXT also cover the Greater Region but lean toward enterprise contracts.
🔌 I do not want to be locked to one ISP · Voxbi · DEEP Telecom · Cegecom
Some Luxembourg operators bundle their Cloud PBX with their own internet service and require you to use both. The three above let you keep your existing ISP or choose a different one.
Why these three: Voxbi operates over any internet connection and supports backup internet from a second provider. DEEP Telecom sells voice services that run on third-party access where the customer has it. Cegecom offers managed voice without requiring its own internet product.
Worth knowing: Bundled offers from Tango, Visual Online, Eltrona, and Luxembourg Online can be cost-effective if you need new internet anyway, but they create lock-in. Switching ISP later means switching phone provider too. International platforms like Microsoft Teams, Wildix, and Innovaphone are also ISP-independent by design.
💼 My team uses Microsoft Teams every day · Microsoft Teams · Voxbi · Tango
For businesses already standardised on Microsoft 365 where staff prefer to make and receive calls inside Teams rather than in a separate app.
Why these three: Microsoft Teams Phone is the native option, fully integrated with Microsoft 365 licensing. Voxbi offers Direct Routing into Teams, giving you a full Cloud PBX feature set with Teams as the calling interface. Tango offers a Teams-compatible add-on alongside its standard Fix4Bizz product.
Worth knowing: Native Microsoft Teams Phone is simple but has a thinner feature set than dedicated Cloud PBX products. If you need advanced call routing, queues, or analytics, Direct Routing through a Cloud PBX provider usually serves you better.
🔵 A note on integration paths. There are three ways to bring telephony into Microsoft Teams: Microsoft Calling Plans, Operator Connect, and Direct Routing. Calling Plans means Microsoft sells you minutes directly. Operator Connect lets a Microsoft-certified operator provision numbers from inside the Teams admin portal: setup is fast, but the operator list is short, minute pricing tends to be higher, and support typically routes through the global partner. Direct Routing connects your own provider's SIP trunks to Teams via a Session Border Controller (or a managed service from the provider). It takes slightly more configuration up front, but it gives you free choice of operator, lower per-minute cost, easier porting of existing Luxembourg numbers, and local support in your language. For most Luxembourg businesses, Direct Routing through a local Cloud PBX provider is the stronger long-term setup.
🛠️ Self-hosted control · 3CX · FreePBX · Asterisk
For IT-led teams comfortable managing their own systems. Lower licensing cost, higher operational responsibility. This is a different category of buyer from the criteria above, so we list the established options as information rather than as competitive picks.
The three established self-hosted platforms: 3CX is the easiest entry point, with a commercial licence model and good documentation. FreePBX is open-source with a polished web interface, popular with mid-sized self-hosted setups. Asterisk is the underlying engine that powers FreePBX and most other open-source PBX systems, suited to custom builds.
Worth knowing: All three need SIP trunks for connectivity to the public phone network. Mixvoip provides certified SIP trunks for 3CX, Innovaphone, and Wildix, so you can self-host the PBX while using Mixvoip purely for telephony connectivity. Self-hosting lowers software cost but adds responsibility for backups, security patches, and uptime. It is a good fit only if you have IT capability in-house or a managed-service partner.
🇱🇺 I need local support in my language · Mixvoip · DEEP Telecom · Post Telecom
For businesses where staff communicate in Luxembourgish, French, German, or English, and prefer a support team based in Luxembourg.
Why these three: Mixvoip runs its support from Luxembourg in four languages: Luxembourgish, French, German, and English. DEEP Telecom is Luxembourg's largest fixed operator with a long-established multilingual support team. Post Telecom operates the country's largest customer-service network with public-administration experience.
Worth knowing: Smaller LU operators such as Tango, Cegecom, Visual Online, Eltrona, and Luxembourg Online also offer local multilingual support, scaled to their customer base. International platforms (Microsoft Teams, Wildix, Innovaphone, Cisco Webex) typically route support through partners or international call centres, which can mean longer response times and language limitations.
🪶 Simplest setup (1-3 users) · Voxbi · Tango · Luxembourg Online
For freelancers, very small teams, or single-location businesses that do not need analytics, queues, or multi-country numbers.
Why these three: Voxbi offers managed setup with online provisioning, and the per-user cost stays low at small scale. Tango Fix4Bizz bundles a basic Cloud PBX with Tango internet, which suits very small setups that want one bill from one provider. Luxembourg Online provides a simple Cloud PBX bundled with its internet products, aimed at small businesses with straightforward needs.
Worth knowing: Visual Online and Eltrona offer comparable bundled voice products at this end of the market, typically tied to their internet service. Microsoft Teams Phone is also a strong option if your team already runs Microsoft 365. Simple does not always mean cheap. Always check what is included in the base price and what costs extra: handsets, number porting, voicemail-to-email, mobile app.
Choose by buyer profile
The four profiles below cover the most common business types in Luxembourg. Find the one closest to yours.
🏢 SME (5-50 employees) · Voxbi · DEEP Telecom · Cegecom
You need predictable monthly cost, no in-house IT requirement, and multilingual local support. You may have one or two locations and a mix of office and remote staff.
Reasoning: Voxbi delivers a fully managed Cloud PBX with transparent pricing and Luxembourg-based support, sized for SME budgets. DEEP Telecom offers managed PBX services with the backing of a tier-1 LU operator, well-suited to SMEs that want a long-established carrier relationship. Cegecom is B2B-focused and combines fibre-first infrastructure with managed voice, a fit for SMEs that already use Cegecom internet or want to consolidate.
Likely deciding factor: Whether you prefer a Cloud-PBX-first product (Voxbi) or a carrier relationship that wraps voice around your existing connectivity (DEEP, Cegecom).
🌐 Multi-site or Greater Region · Mixvoip · DEEP Telecom · Cegecom
You have offices in two or more countries (Luxembourg plus Belgium, Germany, or France), and you want one provider covering all of them with one account, one bill, and one admin portal.
Reasoning: Mixvoip provides numbers and connectivity across LU, BE, DE, FR from one Luxembourg-licensed account, with public pricing and direct LU support. DEEP Telecom handles cross-border coverage through partner agreements, suited to LU-headquartered businesses with non-LU sites. Cegecom covers the Greater Region for B2B customers via its parent group's wider European footprint.
Likely deciding factor: Operator size and contract style. Mixvoip is the most transparent on price and coverage. DEEP and Cegecom lean toward larger contracts with negotiated terms.
🤝 IT reseller or integrator · Mixvoip · Cegecom · DEEP Telecom
You deploy Cloud PBX systems (3CX, Wildix, Innovaphone, or others) for your clients. You need certified SIP trunks for telephony connectivity, a reseller programme, and a no-poach guarantee that protects your client relationships.
Reasoning: Mixvoip offers certified SIP trunks for 3CX, Innovaphone, and Wildix, with a reseller portal and a written non-compete clause that protects partner clients. Cegecom and DEEP Telecom both run carrier-grade SIP trunk services with reseller-friendly terms for IT integrators.
Likely deciding factor: Whether you need an explicit no-poach guarantee in writing, or whether you are comfortable with a standard wholesale relationship. Mixvoip is the most explicit on the no-poach point.
🏛️ Public sector or regulated · Mixvoip · Post Telecom · DEEP Telecom
You are a public administration, financial services firm, healthcare organisation, or other regulated entity. You need formal SLAs, EU data residency, established procurement processes, and audit-ready documentation.
Reasoning: Mixvoip is ILR-licensed, EU-hosted, and has experience with regulated SMEs in finance and legal. Post Telecom is the historic public operator and works extensively with Luxembourg public administration. DEEP Telecom is part of the POST group with carrier-grade infrastructure and enterprise SLAs.
Likely deciding factor: Procurement preference. Post Telecom and DEEP Telecom are the established choices for traditional public-sector procurement. Mixvoip suits regulated SMEs that want transparent pricing and faster onboarding.
Frequently asked questions
❓ Why is price not shown for every provider?
Most Luxembourg operators use a quote-only model and do not publish prices on their websites. We list public pricing where available and note "quote-only" where it is not. The difference is not a quality signal: established carriers commonly use quote-only pricing for B2B services. It does mean comparing costs takes longer.
❓ Can I switch providers later?
Yes. Number portability is mandatory in Luxembourg under ILR rules. You can keep your business numbers when you change provider. Switching typically takes one to four weeks depending on the type of number (geographic, mobile, special-rate).
❓ Is Microsoft Teams a real Cloud PBX?
Microsoft Teams Phone covers the core functions of a Cloud PBX (calls, voicemail, basic routing) but its feature set is thinner than dedicated platforms. For advanced routing, queues, IVR, recording, and analytics, businesses commonly use Direct Routing: Teams as the user interface, a Cloud PBX provider as the underlying telephony engine.
❓ What about GDPR and data residency?
Cloud PBX services process call metadata and, if you enable recording or transcription, the call content itself. Under GDPR, this is personal data. EU-based processing is strongly preferred for businesses in Luxembourg, France, Germany, and Belgium. Ask any provider where their voice and data infrastructure is hosted before signing.
❓ Are open-source options safe for business?
Yes, when properly maintained. 3CX, FreePBX, and Asterisk are used by thousands of businesses worldwide, including in regulated industries. The risk is operational rather than technical: if your team cannot patch the system promptly, security and compliance issues can build up. Self-hosting is a good fit only if you have IT capability in-house or a managed-service partner.
Keep exploring
📦 Features
The 14 core Cloud PBX capabilities, each on its own page. See what each tool does and when it matters.
⚖️ All providers
The full list of 19 providers covered on pbx.lu, with detailed reviews of each.
📅 Ready to commit to a shortlist?
Free 30-minute consultation with a local Cloud PBX expert. We review your top three picks, answer your questions, and help you avoid the common procurement traps. No pitch deck, no commitment.