Digital traffic pipeline management startup Gravitee Topco has closed on a $60 million Series C funding round, bringing its total amount raised to date to more than $125 million. The company is the creator of an open-source API management platform that provides developers with the tools they need to easily manage both legacy and newer data streaming protocols. It also provides a wealth of API security tools with its platform. Gravitee’s core offering is split into two products, with the Gravitee API Management tool designed for API publishers, and the Gravitee Access Management offering aimed at the developers who need to use those APIs. Through the two platforms, it provides tools that span API design, access, management, deployment and security. Gravitee can therefore be thought of as a kind of control plane for APIs, which often come with a confusing array of protocols and tools that can quickly overwhelm developers, despite their intention of making life simpler. Companies can deploy Gravitee’s core, open-source offering in the cloud or on-premises, or they can access the premium platform through the startup’s software-as-a-service offering. Its core features include a tool for designing and deploying APIs, mock testing and a dashboard that provides an overview of team’s API deployments. What makes Gravitee different is that it supports both asynchronous and synchronous APIs, meaning APIs that deliver data at a later point in time, and those that deliver data immediately, in real time.