Cerillion plc (AIM:CER) said in an announcement that it has achieved "Diamond-level" status in TM Forum's Open API Conformance programme, a level reserved for vendors that have certified more than 50 Open APIs.
The company said it holds 32 Real World Open API certifications across five live customer deployments, giving it "the highest number of TM Forum Real World Open API certifications of any BSS/OSS vendor." The filing noted that real-world certifications validate APIs proven in operational environments rather than solely in lab conditions.
Louis Hall, CEO of Cerillion plc, commented: "Diamond-level status is an important milestone, but the real story is how those certifications have been achieved. Our API-first approach ensures that TM Forum Open APIs are built into the core of our solution. The result is not just compliance, but proven delivery in live customer deployments - giving our customers real confidence and certainty of outcome."
The company said its differentiation rests on an API-first architecture with Open APIs embedded natively across its BSS/OSS Suite, enabling interoperability and integration with emerging standards such as the Model Context Protocol (MCP).
