COS Business Engine

Seamless OS is a cloud-native BSS/OSS telecom platform from Telness Tech that eliminates traditional telecom complexity by combining core billing, customer operations, service activation, and network-agnostic management into a single, fully automated stack designed for fast, digital-first mobile service delivery. It enables companies to launch their own branded mobile operators by supporting prepaid and postpaid plans, eSIM and travel eSIM products, mobile apps, checkout and payments, regulatory billing and taxation, and complete subscriber lifecycle management with modular APIs and webhook integrations. Built-in AI and agentic capabilities automate workflows, customer support, and operational tasks to reduce overhead and future-proof services for the AI era, while the platform’s flexible, modular architecture lets operators configure, bundle, and upsell products such as data packs, devices, and value-added services.

Cerillion is a pre-integrated suite of BSS/OSS products for fixed, mobile, cable and multi-service Communications Services Providers (CSPs) worldwide. Built around a common technology framework using industry standards including TM Forum Open APIs, Open Digital Architecture and the 3GPP charging specifications, the product suite is available for modular and end-to-end solution delivery. Cerillion follows a pure product model, with regular six-monthly software releases, delivering incremental benefits through its evergreen software upgrade programme and ensuring customers always have access to the latest product features. The pre-integrated suite uses configuration not customisation to map business rules and processes across the whole BSS/OSS solution, and is designed with a strong focus on user experience, ensuring Cerillion products are intuitive and straightforward to use for an increasingly digital-native customer base.