COS Systems Expands Global Fiber Software Leadership with Fiber Flow Acquisition and Strategic Partnership with Vinnergi

The transaction creates the Nordic region’s leading software platform for broadband operators combining Vinnergi’s network expertise and local delivery organization with COS Systems’ cloud-based BSS/OSS and network automation platform.

West Palm Beach, FL, September 8, 2026 — COS Systems and Vinnergi today announced a strategic partnership. As part of the agreement, COS Systems has acquired the Fiber Flow software platform from Vinnergi and its subsidiary Bitvis. Fiber Flow is one of the major BSS/OSS platforms in the Nordics and manages more than 400,000 active subscribers across nearly 30 networks in the Nordic region.

What Fiber Flow adds to the COS Systems platform

Fiber Flow strengthens COS’s current capabilities within network management and provisioning, especially for Active Ethernet access equipment. Today the dominant technology on most markets is PON, but there are still a lot of Active Ethernet networks deployed. COS’s capability to bring full automation to these networks and streamline a transition from Active Ethernet to PON is greatly enhanced with the acquisition.

Why COS Systems and Vinnergi are partnering

The two companies bring complementary strengths to the partnership. Vinnergi is a leading Swedish engineering and technology consulting company with extensive experience in fiber network development and operations. It sells and implements Fiber Flow throughout the Nordic market and has a particularly strong position in Sweden.

COS Systems is a dedicated software company founded in Umeå that has expanded globally. Today, COS Systems is a leading BSS/OSS provider in North America, serving municipal broadband networks, regional service providers and major Tier 1 carriers.

“Nearly 20 years ago, we built the first version of COS for Swedish Open Access networks and later brought the platform to North America. Since then, we have expanded our portfolio to address some of the industry’s most important challenges, including consolidating different networks and improving how installations and repairs are managed in the field. The partnership with Vinnergi and the acquisition of Fiber Flow mark the beginning of a broader investment in the European market.”

Mikael Philipsson, CEO, COS Systems

What changes for Fiber Flow customers

Following the transaction, COS Systems will assume responsibility for the continued development of Fiber Flow as part of its broader software platform. Vinnergi will remain the customer-facing partner in the Nordic market, providing sales, implementation, integration and support. Through the partnership, Vinnergi will also gain access to the full COS Systems product portfolio.

“We’ve developed Fiber Flow together with Sweden’s municipal networks, and that work will continue exactly as before. Same points of contact, same agreements, and same support. We’re now also expanding our offering through COS Systems’ portfolio. Because we’re more than a technology consultancy — we’re the integrator embedded in our customers’ everyday operations. Through the partnership, we can now take that approach to more networks across the Nordics and Europe, fully in line with our strategy.”

Pierre Wallgren, CEO, Vinnergi

About COS Systems

COS Systems provides a cloud-based BSS/OSS platform purpose-built for broadband operators. Operators choose COS Business Engine to run full retail ISP operations: subscriber management, billing and provisioning; or COS Wholesale Engine to orchestrate multi-provider Open Access networks. COS FSM and COS Prospector extend the platform with automated field service management and door-to-door demand aggregation, so operators can sell faster, scale better, and automate everything. The portfolio comprises COS Business Engine, COS Wholesale Engine, COS FSM, COS Prospector, COS Marketplace and now also COS Fiber Flow.

About Vinnergi

Vinnergi is a Swedish technology consultancy building smarter infrastructure across telecom, energy and property. The company takes end-to-end responsibility, from decision to operation. Customers include network operators, mobile operators, energy companies, municipalities and property owners. The business is organised into four areas: Communicate for fixed and mobile networks, Power for electricity and renewable energy, Living for building technology and physical security, and Construction for turnkey delivery of critical infrastructure. Vinnergi is headquartered in Linköping with offices in around 20 locations. The group turns over approximately SEK 900 million and employs more than 600 people. The company is partly employee-owned; its majority owner is Polaris.

Frequently asked questions

What has COS Systems acquired?

COS Systems has acquired the Fiber Flow software platform from Vinnergi and its subsidiary Bitvis. Fiber Flow is a BSS/OSS platform for broadband operators. It manages more than 400,000 active subscribers across nearly 30 networks in the Nordic region.

What changes for existing Fiber Flow customers?

Nothing changes in day-to-day operations. Vinnergi remains the customer-facing partner in the Nordic market and continues to provide sales, implementation, integration and support. Points of contact and agreements stay the same.

Who develops Fiber Flow now?

COS Systems assumes responsibility for the continued development of Fiber Flow as part of its broader software platform.

Is this an acquisition of Vinnergi?

No. Vinnergi remains an independent technology consultancy. COS Systems acquired the Fiber Flow platform only. The two companies have entered a strategic partnership, and Vinnergi gains access to the full COS Systems product portfolio.

Does COS Systems support Active Ethernet provisioning?

Yes. Fiber Flow provisions Active Ethernet access equipment directly, and that capability now belongs to COS Systems. PON dominates new builds, but large Active Ethernet estates remain in service and still have to be operated. The acquisition brings automated Active Ethernet provisioning into the COS platform alongside PON, so an operator can run both from one system and migrate from Active Ethernet to PON without changing platforms.

What products make up the COS Systems portfolio?

The portfolio comprises COS Business Engine, COS Wholesale Engine, COS FSM, COS Prospector, COS Marketplace and now also COS Fiber Flow.

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