List of the Top Free OSS/BSS Systems in 2026

Serving telcos, MVNOs, and communication service providers, PortaBilling is a charging and billing platform that supports the full lifecycle of launching, pricing, provisioning, and managing services — from voice, video, and IPTV/VoD to IP Centrex/Hosted PBX, residential VoIP, WiFi, LTE, and IoT/M2M. It covers a wide range of business models, including wholesale, retail/SMB, wireless, converged, and IoT deployments, along with MVNO/MVNE setups. An open API architecture allows the platform to integrate with third-party systems as needed. Operators can choose between a one-time unlimited license or a recurring monthly SaaS subscription, running either on-premise or in the cloud via Oracle Cloud Infrastructure. PortaBilling currently serves more than 500 customers around the world.

Seamless OS, created by Telness Tech, represents a groundbreaking cloud-based BSS/OSS telecom platform that addresses the challenges commonly faced in telecommunications by consolidating essential operations such as billing, customer management, service activation, and network-agnostic oversight into an automated system designed for the swift launch of digital-first mobile services. This platform enables businesses to establish their own branded mobile operations, offering functionalities that support both prepaid and postpaid services, eSIM and travel eSIM options, mobile applications, payment processing, and compliance with billing and taxation regulations, along with a thorough management of subscriber lifecycles through a set of modular APIs and webhook integrations. Additionally, the integration of artificial intelligence and autonomous features optimizes workflows, improves customer service, and automates various operational tasks, leading to a significant reduction in overhead costs while ensuring readiness for an AI-driven future. The adaptable, modular architecture of the platform provides operators the ability to tailor, bundle, and market a range of products, including data plans, devices, and extra value-added services, rendering it an exceptional solution for contemporary telecommunications requirements. Consequently, Seamless OS enhances operational productivity and equips telecom providers to swiftly adapt to evolving market trends and consumer demands, ultimately fostering a more agile and responsive business environment. The comprehensive capabilities of this platform make it not only a tool for operational success but also a strategic asset in navigating the complexities of the telecommunications landscape.