What Zextras Group does

Zextras Group is a privately held Italian-headquartered technology company operating as the international holding entity for five wholly-owned subsidiaries (Studio Storti, Zextras, Zextras Services, Zextras Technology, and Zextras India). The group employs 120+ people across five offices in Italy, France, and India, with roots dating to 2004 when Studio Storti began delivering Open Source and Data Protection solutions to Italian Public Administration. The holding structure was formed in 2022 to unify these entities under a single corporate umbrella.

The group's flagship product is Carbonio, a sovereign private digital workplace platform that combines email, chat, video meetings, file sharing, and real-time collaborative document editing in a single Linux-based deployment. Carbonio is offered in three editions (Community, Email, and Workspace) with add-on modules for ActiveSync and User Mail Replica high availability. The platform is built on open standards (IMAP, SMTP, CalDAV, CardDAV, SAML, LDAP, S3-compatible storage) and supports on-premises, private cloud, and sovereign SaaS deployment, targeting organizations requiring data residency and regulatory compliance under GDPR, NIS2, DORA, BaFin, and other frameworks.

Zextras generates revenue exclusively through a 100% certified-partner channel model with Silver, Gold, and Platinum tiers, structured around subscription licensing, metered consumption (Small/Medium/Large tiers for MSPs and multi-tenant deployments), and perpetual licensing with separate maintenance subscriptions. The company does not sell direct; certified partners, including system integrators, MSPs, cloud providers, telcos, VARs, and consultancies, own customer relationships, set pricing, and deliver migrations, managed services, and ongoing support. Zextras serves public sector, financial services, healthcare, education, and privacy-focused organizations across Europe, Southeast Asia, and globally through its partner network.

Name

Zextras Group

Legal name

Zextras s.r.l.

Website

https://zextrasgroup.com

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

1–10 employees

Short description

Zextras Group is an Italian-headquartered, privately held technology company that develops and licenses Carbonio, a sovereign on-premises and private-cloud digital collaboration platform (email, chat, video, files, documents) delivered exclusively through a global network of certified channel partners serving regulated public-sector, financial, healthcare, and education customers.

Ownership category

akta.pro rank

Product category

Enterprise Collaboration Software

NAICS

Software Publishers (5132), Custom Computer Programming Services (541511), Computer Systems Design and Related Services (54151)

SIC

Services-Computer Programming Services (7371)

akta.pro primary industry

Low-Code/No-Code Application Platforms (HDAEAKAA)

Keywords

• Sovereign collaboration platform
• Private email solutions
• Partner channel distribution
• Data residency compliance
• Open source collaboration

Headquarters

HQ city

Milan

HQ country

Italy

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Software Licenses (Subscription): Subscription licensing for end-customer installations where customers directly own the platform instance. Licenses are sold for specific end customers with clearly scoped and planned usage over time.
2. Metered Licensing: Consumption-based licensing for service providers delivering Carbonio to multiple end customers. Partner acts as contractual customer towards Zextras with usage measured over time across commitment tiers (Small M1, Medium M2, Large M3).
3. Perpetual Licenses: No duration restrictions, valid as long as version is on same Major Release. Includes first-year maintenance fee; subsequent years require renewal.
4. Partner Services: Partners generate revenue through migrations, managed services, deployment, support, and multi-tenant delivery. Zextras never competes with partners in direct sales, ensuring partner ownership of customer relationship.
5. Software Maintenance: Software updates including vulnerability fixes and bug fixes. Included with subscription licenses for duration of subscription; included with perpetual licenses for first year with renewal required thereafter.
6. Add-on Modules: ActiveSync and User Mail Replica add-ons available for Email and Workspace editions with per-user or per-infrastructure pricing.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels10 records

Core offering

Zextras Group develops and licenses Carbonio, a sovereign private digital workplace platform that combines email, chat, video meetings, file sharing, and document collaboration into a single unified suite deployable on-premises, in private cloud, or as sovereign SaaS. The platform is delivered exclusively through a tiered certified partner network (Silver/Gold/Platinum) and is offered in three editions — Community (free), Email, and Workspace — plus ActiveSync and User Mail Replica add-ons, targeting organizations in regulated sectors that require data residency, infrastructure control, and regulatory compliance.

Product overview

Zextras Group offers Carbonio, a sovereign private digital workplace platform delivered through a three-tier product architecture: Community Edition (open-source, limited), Email Edition (enterprise email with security and administration), and Workspace Edition (full collaboration suite adding chat, video, files, and documents). Add-on modules include ActiveSync for mobile device management and User Mail Replica for high availability. The platform is deployed on-premises or in private cloud through certified partners, emphasizing digital sovereignty, data residency control, and regulatory compliance. Zextras Suite (legacy) and freeware tools (Chat, Migration) round out the product portfolio. Licensing models include per-mailbox subscription, perpetual, and metered consumption for service providers.

Differentiator

Problem solved

Functional benefit

Brands

• Carbonio: Sovereign digital collaboration platform bringing together email, chat, video, files, and documents in a unified platform for organizations requiring control, privacy, and data sovereignty.
• Carbonio Community Edition
• Carbonio Email Edition
• Carbonio Workspace Edition
• Zextras Suite

Products and services

• Carbonio Carbonio is a sovereign private digital workplace platform combining email, chat, video meetings, file sharing, and document collaboration into a unified on-premises or private cloud deployment. Delivered through certified partners, it targets organizations requiring data sovereignty, regulatory compliance, and full infrastructure control.
• Carbonio Community Edition Open-source edition providing basic mail, calendar, mobile apps, files, and document editing capabilities for open-source enthusiasts and small organizations that do not require enterprise scalability, advanced features, or professional support.
• Carbonio Email Edition Enterprise-grade email functionality with built-in antivirus, anti-spam, real-time backup, 2FA, SAML SSO, delegated administration, multi-tenant environment, white labeling, hierarchical storage management, and S3-compatible object storage. The entry point for organizations beginning their sovereign collaboration journey.
• Carbonio Workspace Edition Full digital workplace extending Email Edition with integrated chat, video meetings, file sharing, real-time collaborative document editing, meeting recording, external participants support, and multiple moderator capabilities.
• ActiveSync Add-on Enables native synchronization with mobile devices (iOS, Android) via standard enterprise Exchange ActiveSync protocol, with granular device control, anti-DDoS protection, dedicated mobile passwords, and Mobile Device Management (MDM) capabilities.
• User Mail Replica Add-on Provides real-time replication of user emails, contacts, and calendars across multiple servers in the same cluster for continuous accessibility and high availability recovery in case of server failure.
• Carbonio Academy Learning paths and certifications for administrators and partners, from first deployment to advanced operations and migration delivery.

Quantifiable outcome

• Carbonio migration timeline ranges from days (technical migration for small orgs) to 4-5 weeks (small deployments) up to 14-18 weeks (largest with coexistence period)
• +2 more outcomes

Named customers5 records

Segments7 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

Feature9 records

Partnerships

Three partnerships are on record, tiered core and minor.

• Certified Carbonio PartnerscoreChannel Partner/ Reseller/ DistributorZextras operates exclusively through certified partners who deliver, deploy, migrate, and support Carbonio locally. Partners include system integrators, MSPs, cloud providers, hosters, telcos, VARs, and consultancies. The partner-led model ensures local accountability, language alignment, and compliance context while providing partners ownership of customer relationships and pricing without channel conflict.
• Certified Carbonio ProviderscoreChannel Partner/ Reseller/ DistributorProviders are trained and certified to deliver Carbonio with consistent technical and operational standards. They offer migration from Microsoft 365, Google Workspace, Exchange, Zimbra, or legacy environments. Deployment options include on-premises, private cloud, or sovereign SaaS. Vendor-backed escalation ensures product-level support when required.
• Affiliated ResellersminorChannel Partner/ Reseller/ DistributorPartners may operate through affiliated resellers under defined conditions with prior validation and approval by Zextras. The partner remains the primary reference point ensuring delivery quality, operational consistency, and compliance with program rules. Commercial accountability remains centralized at the partner level.

Scale indicators7 records

Recent moves12 records

Expansion highlights6 records

Direct peers

• ONLYOFFICE: Open-source office productivity and collaboration suite with on-premises and SaaS deployment options. Competes on the document collaboration, sovereignty, and open-standards dimensions, though typically less differentiated in email/groupware than Carbonio.
• Zimbra / Synacor: The upstream open-source collaboration platform that Zextras originally extended and on which Carbonio's architecture is built. Most directly comparable as a self-hosted, open-standards email and collaboration suite targeting enterprises seeking alternatives to hyperscalers.
• Open-Xchange: Provider of white-label email and productivity suites (OX App Suite) sold primarily through ISPs, telcos, and service providers — a near-identical partner-led, multi-tenant distribution model and similar customer base of communications service providers.
• HCL Domino: Legacy enterprise mail and collaboration platform with on-premises and private cloud deployment, used by large regulated organizations including financial institutions. Represents the 'modernize without migrating to a hyperscaler' alternative that Carbonio also targets.
• Kolab Systems: Swiss-based open-source groupware provider offering email, calendar, and collaboration with strong Swiss/EU data-residency positioning. Comparable niche competitor in the on-premises, sovereignty-focused enterprise collaboration segment.
• Nextcloud: Open-source self-hosted collaboration platform offering file sync, chat (Talk), groupware, and office productivity. Directly comparable on the sovereignty, on-premises deployment, and open-standards axes that Carbonio competes on, with similar target customers in regulated European markets.

Emerging players

• Rocket.Chat: Open-source team communication and collaboration platform with self-hosted and sovereign deployment options. Adjacent competitor in regulated and defense/sovereign collaboration use cases, though narrower than Carbonio's full workspace.
• Element (Matrix): Secure messaging and collaboration built on the open Matrix protocol, with sovereign deployment options. Comparable on sovereignty and open-standards axes but primarily focused on messaging rather than full groupware.

Broad incumbents

• Microsoft 365: The dominant incumbent productivity and collaboration suite. Carbonio is explicitly positioned as a sovereign alternative for European organizations seeking to escape Microsoft 365's data residency, cost, and lock-in concerns.
• Google Workspace: Hyperscaler productivity suite competing for the same European enterprise collaboration budget. Carbonio's value proposition around data sovereignty and self-hosting is structured to win migrations away from Google Workspace in regulated sectors.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/zextras-group

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries5 records

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 Zextras Group