GrowthX
Updated 2026-06-06AI-native growth agency (growthx.ai, not the unrelated growthx.com or growthx.digital) founded in 2024 by CEO Marcel Santilli and CTO Daniel Lopes, with customers including Ramp, Reddit, Webflow, Abnormal, and Superhuman. It runs an expert-guided AI content engine — editorial, programmatic SEO, case studies, content refresh, and AEO — pitched as content-as-pipeline that wins both Google rankings and AI visibility. Raised a $12M Series A led by Madrona in May 2025.
The Solution & Approach
GrowthX packages itself as "expert-led, AI-powered growth": custom AI workflows with a human in the loop, not a self-serve tool and not a traditional agency. It learns a customer's business, defines the brand voice, then builds tailored AI workflows that publish daily and optimize continuously — tracking rankings, AI citations, traffic, and pipeline together. The offering spans editorial content, programmatic SEO, case studies, content refresh, and AEO, framed as one content engine that establishes the brand as the definitive answer in both search results and AI systems like ChatGPT, Perplexity, and Gemini. The model is what founder Marcel Santilli calls "service-as-software" — outcomes delivered through agents, with experts guiding strategy and quality.
Best for
Brands that want a managed content engine producing organic and AEO outcomes at scale — content-as-pipeline executed by AI workflows under expert oversight — rather than buying a monitoring or writing tool to run themselves.
Notable customers
Ramp, Reddit, Webflow, Abnormal, Superhuman, Bolt (StackBlitz), Vapi, Lovable (source).