The 10 cheapest cloud PBX providers in 2026

Cloud PBX pricing is harder to compare than it first appears.

One provider may advertise €3 per user, another €20, while another only provides a quotation. But those prices may include very different things: a phone number, unlimited calls, domestic minutes, AI features, support, or simply access to the PBX platform.

To make the comparison useful, PBX.lu looks at five standard business sizes: 1, 3, 5, 10 and 20 users. If you are new to hosted telephony, begin with our Cloud PBX and business phone systems guide.

We also separate three cost components:

Table of contents

• Quick comparison

• How to read this comparison

  • PBX Subscription

  • Business Number

  • Included Call Allowance

  • Metered Calls

  • Unlimited Calls

  • Known Monthly Cost

• Main Cloud PBX pricing comparison

• Voxbi Plus AI

• Visual Online

• NFON Cloudya Premium

• Microsoft Teams Phone Domestic

• Ringover SMART

• CloudTalk Essential

• Tango Fix4Bizz

• Orange Luxembourg Virtual PBX

• 1 user: solo business

• 3 users: very small business

• 5 users: small business

• 10 users: growing SME

• 20 users: established SME

• Why the winner can change once calls are added

  • Metered model

  • Included-minute model

  • Unlimited-call model

• Providers with quote-only pricing

• Which Cloud PBX offers the best published fixed price?

• Frequently asked questions

  • How much does a Cloud PBX cost in Luxembourg?

  • Which Cloud PBX has the lowest published price for five users?

  • Are phone numbers included?

  • Are calls included?

  • Why isn't 3CX given a normal per-user price?

• Methodology

  • Winner definition

• Primary sources

1. PBX Subscription: the recurring Cloud PBX licence or service fee.

2. Business Number: whether a Luxembourg +352 number is included or charged separately.

3. Included Call Allowance / Metered Calls: exactly how outbound calls are billed.

This allows readers to see not just the advertised price, but what that price actually buys.

Cloud PBX pricing in Luxembourg: subscriptions, numbers and call usage compared. {color="gray"}

Prices verified: 21 August 2026. Prices and plan structures can change. We prioritize official provider pricing pages, tariff documents and product documentation.

Quick answer: Under our standardized fixed-cost methodology, Voxbi Plus AI has the lowest verified recurring PBX subscription in all five company-size scenarios. That does not automatically mean it produces the lowest final telephone bill for every company: Voxbi charges calls separately, while several higher-priced alternatives include a phone number, domestic minutes or unlimited calling.

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Quick comparison

Winner definition: the provider with the lowest verifiable Known Monthly Cost among plans meeting our functional-comparability criteria.

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How to read this comparison

PBX Subscription

The recurring fee required to use the Cloud PBX. It does not automatically include a phone number or outbound calls.

Business Number

A public telephone number such as a Luxembourg +352 number. We classify it as Included, 1 number/user included, Extra: published price, or Extra: price not publicly disclosed.

Included Call Allowance

Calls already covered by the subscription. We state quantity + geographic scope + billing unit + period, for example 1,200 domestic min/user/month.

Metered Calls

Calls charged according to actual usage. Where rates are public, we link to the provider's official call-rate information.

Unlimited Calls

We use “unlimited” only with the provider's geographic scope and, where applicable, fair-use conditions.

Known Monthly Cost

All mandatory recurring charges we can verify publicly, before variable or excess call usage. If a component is unknown, we say so explicitly.

Need a term explained? Use the PBX.lu business telephony glossary for plain-language definitions of Cloud PBX, VoIP, SIP, UCaaS, softphones and other terms used in this comparison.

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Main Cloud PBX pricing comparison

* Reference-market price, not a Luxembourg-specific quotation.

† Requires a separate qualifying Microsoft Teams licence.

‡ Approximate total using one CloudTalk Luxembourg number at the published starting price of $6/month; actual EUR value varies with FX.

Want to compare provider profiles beyond price? Browse the PBX.lu provider directory for local operators, international platforms and self-managed PBX options available to Luxembourg businesses.

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Voxbi Plus AI

Voxbi Plus AI costs €3.10 per user/month excluding VAT. It includes everything in Voxbi Plus plus unlimited AI transcription and summaries, Voxbi Insights, analytics, Odoo integration, Microsoft 365 integration, API access, BYOC, international-number support, and inbound/outbound number portability.

Paid Voxbi One plans include no phone number. Voxbi states that numbers start at €1.60 each, but its pricing FAQ does not currently publish a specific Luxembourg +352 rate. Calls are billed per minute.

Voxbi pricing · Voxbi call rates

Standardized entry

PBX Subscription: €3.10/user/month

Business Number: Extra: +352 recurring price not publicly disclosed

Included Call Allowance: None

Calls: Metered

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Visual Online

Visual Online publishes several Cloud PBX tiers. Standard Plus Voice starts at €11/month and adds ACD, CRM integration and an operator console. Its public page also advertises mobile applications, auto-attendant, analytics and international calling, but does not provide enough detailed PSTN pricing to normalize the entire telephone bill against every other provider.

Visual Online Cloud PBX pricing

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NFON Cloudya Premium

NFON provides one of the clearest public tariff structures in this comparison. Its current reference tariff states Cloudya Business Premium at €9.90/user/month, €35 one-time activation per seat, fixed calls at €0.009/min, mobile at €0.099/min, fixed + mobile flat rate at €8.90/month, and 10 local numbers at €19 one-time.

NFON pricing and call rates

This is a reference-market tariff, not a confirmed Luxembourg commercial offer.

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Microsoft Teams Phone Domestic

Microsoft Teams Phone with Domestic Calling: Country Zone 2 costs €19.10/user/month, paid yearly, excluding VAT. The plan includes Teams Phone Standard, a Microsoft telephone number and 1,200 outbound domestic minutes/user/month. A separate qualifying Microsoft Teams licence is required.

Microsoft Teams Phone pricing

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Ringover SMART

Ringover SMART starts at €21/user/month with a 12-month commitment. It includes a fixed number in eligible countries, unlimited calls to eligible destinations under plan conditions, IVR, call routing, recordings, and AI transcription/summaries.

Ringover pricing

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CloudTalk Essential

CloudTalk Essential costs €29/user/month billed annually. A Luxembourg virtual number starts at $6/month. CloudTalk supports domestic calling allowances in eligible EU markets, while international and excess calls follow the applicable tariff and fair-use rules.

CloudTalk pricing · CloudTalk Luxembourg numbers

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Tango Fix4Bizz

Tango advertises Fix4Bizz as a comprehensive cloud telephone exchange for €9.90/month. However, its public page does not provide enough detail to determine whether €9.90 should be multiplied by each user or how all PSTN and calling costs work across 3, 5, 10 and 20 users.

Tango Fix4Bizz

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Orange Luxembourg Virtual PBX

Orange Luxembourg's Virtual PBX includes retention of existing telephone numbers, a tailor-made number of extensions, free national fixed calls, and 120 minutes per extension to fixed destinations in Europe. The missing component is the public recurring PBX price.

Orange Virtual PBX

The comparison uses the same five team-size scenarios throughout: solo business through established SME. {color="gray"}

1 user: solo business

Winner for 1 user: Voxbi Plus AI

Voxbi Plus AI has the lowest verified fixed recurring PBX subscription for a one-user business in this comparison. Its €3.10 price is particularly attractive where outbound calling is modest. The trade-off is that a Luxembourg number and all outbound minutes must be added separately.

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3 users: very small business

Winner for 3 users: Voxbi Plus AI

Voxbi Plus AI remains the lowest verified fixed subscription at three users. Companies making substantial outbound calls should still compare Voxbi's metered usage with bundled-minute or unlimited-call plans.

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5 users: small business

Five users is the most useful headline scenario for many SMEs.

Winner for 5 users: Voxbi Plus AI

At five users, Voxbi Plus AI has the lowest verified fixed Cloud PBX subscription: €15.50/month before the Luxembourg number and outbound calls. Higher-priced alternatives bundle more telecom value, so heavy callers should calculate expected monthly usage rather than choosing only from licence price.

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10 users: growing SME

Winner for 10 users: Voxbi Plus AI

Voxbi Plus AI again has the lowest published fixed subscription at ten users. The advantage grows in absolute euros as the team expands, but bundled calls, support, SLA and integrations become more important to total value at this size.

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20 users: established SME

Winner for 20 users: Voxbi Plus AI

Voxbi Plus AI has the lowest published fixed recurring subscription in our 20-user comparison. At twenty seats, public list prices should be treated as procurement benchmarks rather than guaranteed final contract prices because volume discounts, onboarding and negotiated service levels become more relevant.

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Why the winner can change once calls are added

Three common cost structures: metered usage, included minutes and broader calling bundles. {color="gray"}

Metered model

The business pays PBX Subscription + Business Number + actual minutes used. This can favour teams with many incoming calls or modest outbound usage.

Included-minute model

The licence includes a fixed allowance. Microsoft Teams Phone Domestic, for example, includes 1,200 domestic min/user/month.

Unlimited-call model

The licence includes broad calling under provider conditions. Ringover SMART is an example of this model.

There is therefore no contradiction between Voxbi winning on fixed recurring cost and another provider potentially producing the lower final invoice for a heavy-calling business.

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Providers with quote-only pricing

Several important Luxembourg providers cannot be assigned a numerical ranking because the necessary pricing is not publicly disclosed. This includes POST Luxembourg, Orange Luxembourg, Proximus NXT and cegecom.

A lack of public pricing does not mean a provider is expensive. It means the price cannot be independently reproduced from public information.

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Which Cloud PBX offers the best published fixed price?

Under this study's standardized fixed recurring cost methodology:

• 1 user: Voxbi Plus AI: €3.10 + LU number + metered calls

• 3 users: Voxbi Plus AI: €9.30 + LU number + metered calls

• 5 users: Voxbi Plus AI: €15.50 + LU number + metered calls

• 10 users: Voxbi Plus AI: €31 + LU number + metered calls

• 20 users: Voxbi Plus AI: €62 + LU number + metered calls

Voxbi Plus AI has the lowest verified fixed recurring Cloud PBX subscription across all five company sizes in this study. Businesses with significant outbound calling should compare the additional metered call cost against plans that include domestic minutes or unlimited calling.

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Frequently asked questions

How much does a Cloud PBX cost in Luxembourg?

Public pricing ranges from a few euros per user for self-service Cloud PBX platforms to €20–€30+ per user for packages that bundle numbers, calls, integrations or broader support. Several Luxembourg operators provide pricing only by quotation.

Which Cloud PBX has the lowest published price for five users?

Under pbx.lu's fixed recurring cost methodology, Voxbi Plus AI has the lowest verified subscription at €15.50/month for five users, before the Luxembourg number and metered outbound calls.

Are phone numbers included?

It depends on the provider. Teams Phone and Ringover bundle a number in the relevant plan. Voxbi paid self-service plans do not include a number. CloudTalk charges separately for Luxembourg numbers.

Are calls included?

There are three main models: metered, included minutes, and unlimited under provider terms. Readers should not compare these as if they were identical.

Why isn't 3CX given a normal per-user price?

3CX uses a materially different licensing and carrier model. PSTN connectivity and numbers are normally supplied separately, so converting it into an artificial per-user price would make the comparison less transparent.

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Methodology

Research date: 21 August 2026.

pbx.lu prioritizes official pricing pages, product pages, tariff documents and provider documentation. We do not estimate quote-only pricing, use temporary promotional rates as normal list prices, treat missing public pricing as evidence of high cost, or describe included minutes without stating their scope.

Winner definition

Winner = the provider with the lowest verifiable Known Monthly Cost among functionally comparable hosted Cloud PBX plans.

The winner represents fixed recurring affordability, not a guarantee of the lowest final telecom invoice.

Planning the next step? Use the Cloud PBX migration checklist for Luxembourg businesses to prepare requirements, number porting, testing, cutover and user training.

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Primary sources

• Voxbi pricing

• Voxbi call rates

• Visual Online Cloud PBX

• Tango Fix4Bizz

• Orange Virtual PBX

• NFON pricing and call rates

• Microsoft Teams Phone pricing

• Ringover pricing

• CloudTalk pricing

• CloudTalk Luxembourg numbers

Editorial note: The purpose of this comparison is not to identify one universally “cheap” provider. It is to let a Luxembourg business answer four transparent questions: What does the PBX subscription cost? Is the Luxembourg business number included? How much calling is included? What do additional calls cost?