API management used to be a sleepy corner of enterprise tech. You had your REST APIs over here, your Kafka pipelines over there, and a few “governance” dashboards slapped together somewhere in between. Then Gravitee entered the chat, initially bootstrapped out of Lille, France by five engineers who saw the cracks forming beneath modern digital infrastructure and decided to build a platform with no cracks at all.
Fast forward to May 2025, and Gravitee has secured a $60M Series C led by Sixth Street Growth, with heavy-hitting follow-through from Riverside Acceleration Capital and AlbionVC. That’s not just a vote of confidence, it’s a megaphone telling the enterprise world, your fragmented API story has a new editor, and this one doesn’t deal in half-baked architectures.
Let’s talk founders. Rory Blundell (CEO), David Brassely (CTO), Azize Elamrani (SD Arch, AI & Performance), Nicolas Géraud (CCO), and Titouan Compiegne (Sr. CSA) weren’t playing the valuation game, they were playing the long game. Bootstrapped to profitability before venture money ever hit the ledger. That’s not swagger, that’s blueprint.
Now based in Denver with satellite ops in London and Lille, Gravitee is building for a world where APIs, Kafka streams, MQTT brokers, and AI agents don’t just coexist, they collaborate. One unified platform managing both synchronous and event driven architectures with protocol mediation, federated governance, observability, and yes, AgentMesh for the AI layer. This isn’t your legacy vendor’s half-promise. This is full-stack control, enterprise-grade, ISO27001 / ISO27701 certified, and already trusted by Michelin, Roche, Verint, and Blue Yonder.
Revenue? $22M ARR. Growth? Ranked 9th fastest-growing open-source startup by Oxx. Market? Gartner Leader and the only Customers’ Choice in 2024 for API Management. Gravitee didn’t just join the conversation, they rewired the mic and hard-patched the soundboard.
And let’s not ignore the lesson in this funding. They earned it. By building a product for both the architects and the operators. By solving problems the industry hadn’t admitted were problems yet. By staying open-source but enterprise-ready. Gravitee isn’t raising to figure it out, they’re raising to double down.
This round fuels more than hiring (up to 200 strong by year’s end). It backs their push deeper into Kafka, tighter into federated control, and further into the AI agent frontier. And in a $9B API management market where Microsoft Azure eats 70% of the pie, Gravitee’s not asking for a slice, they’re opening a whole new bakery.
So yeah, $60M is a headline. But the story? Gravitee’s building a world where APIs, events, and agents don’t fight for governance; they operate in symphony.
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