Reddit, Webflow, and Superhuman are already customers—now GrowthX has $12M to grow

GrowthX.ai secured $12 million in Series A funding to advance its unique approach to AI-powered content creation, the company announced Monday. Madrona Venture Group led the round, with participation from angel investors.

The startup has rapidly grown from concept to a $7 million annual run rate in less than a year by developing AI workflows that enhance rather than replace human expertise in content marketing.

“At GrowthX, ‘AI should serve experts, not replace them’ means fixing the ‘blank cursor’ problem,” said Marcel Santilli, CEO and co-founder of GrowthX in an exclusive interview with VentureBeat. “Most AI tools throw you into an empty box, leaving it on you to provide endless context. That gets exhausting, fast. We think differently.”

How GrowthX’s “service-as-software” model redefines content marketing

The company positions itself between traditional service agencies and software products with what it calls a “service-as-software” approach. Rather than providing tools that clients must learn, GrowthX combines AI-powered workflows with expert human oversight to deliver finished content that drives measurable business outcomes.

“Software gets you tools, dashboards, and features — but what you do with them, how you integrate and make the most of it is on you and your team,” Santilli explained. “I think of service-as-software as a shift from tools to outcomes.”

This hybrid model resonates with clients seeking results without the overhead of mastering new tools. The company now counts Reddit, Webflow, Ramp, Superhuman, and Strapi among its 40+ clients.

“Think about writing a top-notch article,” Santilli said. “It’s not just words on a page — there’s a whole process: Researching the topic with your company and audience in mind, creating a clear outline, drafting and refining as you dig deeper, and editing to sharpen your message. Each step requires context, planning, and judgment.”

From workshop to $7M: The rapid growth strategy that worked

GrowthX’s journey began with Santilli’s experience at Deepgram, where he built an AI-driven content system that generated 3,000 pages in three months and increased daily traffic from 1,000 to 30,000 visitors.

“Extremely rapid validation, and fast execution,” Santilli said when asked about the company’s growth trajectory. “We provide AI enhanced services to customers but also use them intensely internally to build the company and deliver.”

After conducting paid workshops with 170 attendees, Santilli identified a crucial market gap. “The feedback was clear: ‘This is exactly what we need… but we don’t have the bandwidth to implement it,’” he recalled. This validation pushed him to move beyond teaching and take on initial customers.

By September, the company had 12 customers and surpassed a $1 million revenue run rate. Santilli partnered with Daniel Lopes, formerly at IFTTT, who now serves as GrowthX’s CTO.

Inside the technology: How GrowthX’s AI platform delivers results

GrowthX built a sophisticated platform that combines content creation tools with flexible AI capabilities. “Our tech stack combines a streamlined content creation platform with a flexible AI runtime,” Santilli noted. “We leverage multiple AI providers through a modular architecture that allows quick adaptation as the AI landscape evolves.”

The company’s workflow shows a comprehensive process from research through SEO optimization. AI handles labor-intensive tasks while human experts guide strategy and ensure quality, creating a seamless blend of automation and human expertise.

This technical approach forms the backbone of their content creation process, enabling them to deliver consistent, high-quality outputs at scale while maintaining the nuanced understanding that only human experts can provide.

The 300% traffic boost: Content strategy secrets behind GrowthX’s success

For clients, GrowthX’s methodical approach to content creation has yielded impressive results — with some experiencing up to 300% increases in organic traffic.

“Most companies chase traffic by guessing. We don’t,” said Santilli. “We help brands become reliable publishers that answer real, specific questions. The kinds of questions that people and, now, AI-driven search engines actually ask.”

The process involves four key steps: deep audience research, structured content development, cost-effective production, and continuous optimization based on performance data.

“Organic growth usually feels slow and expensive because it takes editors, writers, designers, SEO specialists, and many others, working together over the course of months for a strategy to come together,” Santilli explained. “But with smart use of AI, we speed up and simplify the whole process.”

Profitable from day one: The business model breaking AI startup norms

Unlike many AI startups that burn through capital before finding a sustainable business model, GrowthX achieved profitability quickly—a rarity in the sector.

“Stick to what worked,” Santilli said about their approach to profitability. “I’d already built successful growth engines at Deepgram, HashiCorp, Scale AI, and ServiceTitan. As a CMO I knew the pains and the solutions I needed.”

The company generated revenue immediately through paid workshops, which then converted to recurring service contracts. “Early workshop revenue covered first hires and kept us lean — no investor checks needed,” Santilli said. “Early customers saw results fast and spread the word.”

This organic growth meant GrowthX was already profitable before seeking outside investment. “Once we finally announced GrowthX, demand exploded. So we raised money quickly — not because we had to, but because it let us move even faster,” explained Santilli.

The future of AI content: Why human expertise will always matter

As AI reshapes content marketing, GrowthX is investing its new funding primarily in scaling engineering capabilities and hiring experts for customer-facing roles.

Santilli maintains that certain aspects of content creation will always require human input: “I don’t think about this as humans versus AI. It’s more like playing music together. AI is great at spotting patterns, doing the routine stuff, and quickly piecing components together. It helps you skip busywork so you can focus on your best ideas.”

He emphasized that human elements remain essential to creating compelling content. “Great content is often uncomfortable in some way or another. It comes from noticing what’s missing or what’s broken. Machines can’t feel that tension. They don’t get frustrated, curious, or inspired. You do.”

Matthew Panzarino, GrowthX’s Chief Content Officer and former editor-in-chief of TechCrunch, described the company as building “the tools I always wanted us to build when I was an editor, but could never convince people to fund.”

With a profitable model, impressive client roster, and fresh capital, GrowthX seems well-positioned to capitalize on growing demand for AI-enhanced content solutions that preserve the critical role of human expertise in an increasingly AI-driven digital landscape.