What qosi does

Qosi SAS, commercially branded as MOZARK, operates the 5GMARK platform, a mobile network quality-of-experience (QoE) measurement solution based in Paris. Its core technology stack combines no-reference video and audio quality analysis, robotic process automation, machine-learning-driven radio frequency simulations, and deep packet inspection, deployed via native, non-rooted smartphones over the air. A free consumer app (5GMARK) drives crowdsourced test collection from millions of devices globally, while professional tools — 5GMARK Pro (autonomous QoS/QoE probes), 5GMARK Fleet (enterprise team dashboards), a Crowdsourcing Database Access product, and a Custom/White-label engine — are sold to telecom operators, regulators, application publishers, building owners, and consumer associations.

The company monetizes primarily through recurring subscriptions for 5GMARK Pro licenses and database access, supplemented by one-time white-label deployments (e.g., Net.SNCF for French national railway SNCF covering 80,000 agents via MDM), branded consumer apps for the Euroconsumers consortium across five countries, and bespoke professional studies. Pricing is quote-based and not publicly disclosed; the consumer app is free and serves as the top-of-funnel data collection and brand channel. The methodology is referenced by France's Arcep Code of Conduct 2020, providing regulatory credibility in its home market. QoSi is privately held with share capital of €249,300, has no disclosed institutional investors, and has not announced funding rounds or M&A activity in the available sources.

QoSi competes in a niche that bridges telecom analytics, crowdsourced testing, and regulatory compliance, where its global crowdsourced dataset spanning 29+ operators and 38+ countries is the primary differentiator versus traditional drive-test vendors and operator-internal measurement programs. Geographic reach is broad but operationally concentrated in a single Paris office, and the business relies heavily on a small number of large enterprise and consortium relationships for the bulk of disclosed revenue-relevant activity.

Name

qosi

Legal name

QoSi SAS

Website

https://4gmark.com

Company type

Private

Operating status

Operating

Short description

Qosi SAS (operating as MOZARK) runs the 5GMARK mobile network quality-of-experience platform, combining crowdsourced consumer testing with professional QoS/QoE tools sold to telecom operators, regulators, enterprises, and consumer associations across 38+ countries.

Ownership category

akta.pro rank

Product category

Mobile Network Quality Measurement / Telecom Testing Software

NAICS

Telecommunications (517), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (5182), Custom Computer Programming Services (541511)

SIC

Services-Testing Laboratories (8734), Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Voice Quality, Monitoring & Analytics (QoS/QoE, call recording, compliance) (HDAIAHAM)

akta.pro secondary industries

Analytics, QoE/QoS Monitoring & Observability (MPAHAJAH), Testing, QA & Release/Deployment Enablement (BPAEAAAN)

Keywords

• Mobile network testing
• Telecom quality measurement
• Network performance analytics
• Crowdsourced network data
• QoS monitoring tools

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Software

Cost components

Technology or R&D, Personnel, Infrastructure, Operations, Marketing or Sales, Others

Revenue model

1. 5GMARK Pro Licenses: Professional measurement tool licenses for telecom operators, equipment manufacturers, regulators and their service providers. Each license is autonomous and controlled by a portal, providing reliable, comprehensive measurements.
2. Crowdsourcing Database Access: Access to real-time crowdsourced measurement data with data export and KPIs including benchmarking, statistics, optimization, investigation, alerts, and monitoring.
3. Custom/White-label Solutions: Custom-designed measurement applications adapted to specific client needs, such as the Net.SNCF application for French railways.
4. Professional Studies and Analysis: In-depth analysis services for specific issues including marketing analysis, legal expertise, regulatory authorities, and R&D studies.
5. 5GMARK Fleet: Dashboard creation through team testing for optimizing mobile usage of organizational teams.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

QoSi operates the 5GMARK platform, which provides mobile network quality of experience (QoS/QoE) measurement through a free consumer testing application and professional B2B tools (5GMARK Pro, 5GMARK Fleet, custom white-label versions, and crowdsourcing database access). The platform combines crowdsourced end-user measurements with proprietary analysis technologies to deliver network benchmarking, coverage analysis, and customer experience management for telecom operators, regulators, enterprises, and application publishers.

Product overview

QoSi (operating as MOZARK) offers 5GMARK, a comprehensive mobile network performance testing platform. The portfolio consists of a free consumer application (5GMARK) for individual users, 5GMARK Pro for professional QoS/QoE measurement by telecom operators and regulators, 5GMARK Fleet for enterprise team optimization, and a white-label Custom Version for organizations like SNCF. The platform is complemented by a crowdsourced database providing real-time global network measurements across 29 operators.

Differentiator

Problem solved

Functional benefit

Brands

• 5GMARK: Mobile performance test application enabling consumers to test network quality. Collects millions of tests worldwide from all operators in various configurations.
• 5GMARK Pro
• 5GMARK Fleet
• Net.SNCF

Quantifiable outcome

• 80,000 agents deployed via MDM for SNCF
• +2 more outcomes

Named customers3 records

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Two partnerships are on record, tiered core.

• Euroconsumers ConsortiumcoreStrategic or Co-development Partner5GMARK created custom quality-of-customer-experience measurement applications for the Euroconsumers consortium of consumer associations (Test-Achats Belgium, Altro Consumo Italy, Deco Proteste Portugal, Ocu Spain, Proteste Brazil), including barometers, operator comparison tools, and multi-language interface management.
• SNCFcoreOEM/ Whitelabel/ Licensing PartnerCustomized Net.SNCF application developed for French public railway company, deployed to 80,000 agents via MDM for measuring mobile coverage quality used by employees and customers. Provides concrete data for relations with mobile operators.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Ookla (Speedtest): Ookla operates Speedtest.net, the most widely used consumer network testing app, and provides enterprise QoS/QoE analytics to telecom operators globally — directly comparable to QoSi's 5GMARK consumer and Pro offerings across both crowdsourced data and B2B CEM sales.
• Comscore: Comscore's mobile network and audience measurement products offer crowdsourced cross-operator analytics to telecom and media clients, with comparable B2B data licensing and benchmarking revenue streams to QoSi's crowdsourcing database.
• Tutela: Tutela provides crowdsourced mobile network quality data and analytics to operators and regulators worldwide, with a comparable business model of crowdsourced measurements plus enterprise benchmarking, intelligence, and optimization services for telecom operators.
• RootMetrics (Omdia): RootMetrics (now part of Omdia) conducts independent drive-test and crowdsourced mobile performance benchmarking sold to operators and regulators — a closely aligned methodology and customer base to QoSi's 5GMARK Pro offering.

Emerging players

• MedUX: MedUX is an emerging European QoE measurement specialist providing independent telecom service quality data to operators and regulators, comparable in scope to QoSi's 5GMARK Pro and direct competitor in EU regulatory engagements.

Broad incumbents

• Rohde & Schwarz: Rohde & Schwarz provides professional mobile network testing, drive-test, and QoS measurement solutions targeting operators, regulators, and equipment vendors — comparable methodology and enterprise customer set, but as a large, diversified test-and-measurement incumbent.
• Spirent Communications: Spirent offers network testing and assurance solutions including mobile network QoE and benchmarking tools for operators, equipment vendors, and regulators — a comparable test-and-measurement customer base but serving as a broader, deeper-pocketed incumbent.
• NetScout Systems: NetScout offers enterprise-grade network performance monitoring and assurance including DPI-based service quality analytics across fixed and mobile carriers — a broader incumbent with overlapping QoS/QoE measurement capability but a wider portfolio than QoSi's mobile-focused stack.
• Accedian (Cisco): Accedian (acquired by Cisco) provides network performance monitoring and analytics for telecom and enterprise networks, including QoE and SLA assurance — overlapping in telecom customer experience management with QoSi, but as part of Cisco's broader networking portfolio.
• Viavi Solutions: Viavi provides telecom test, measurement, and monitoring instruments and software for operators, equipment makers, and regulators — comparable in customer base and use cases (network benchmarking, QoE) but a much larger hardware-and-software incumbent versus QoSi's software-only stack.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights5 records

Customer concentration

• YouTubeyoutube.com/channel/5GMARK
• LinkedInlinkedin.com/company/4gmark

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about qosi