InvoiceCloud Taps Former Tulip CMO to Scale AI Billing Enterprise

BOSTON, MA – September 17, 2026 — The intersection of local government, public utilities, and cutting-edge artificial intelligence is not typically where one expects to find Silicon Valley’s high-growth unicorn playbook. Yet, that is exactly the strategy unfolding at InvoiceCloud. The Boston-based provider of digital billing and payment solutions announced today the appointment of Madilynn Castillo as Chief Marketing Officer, signaling a definitive shift in how the company plans to capture the enterprise market for regulated industries.

Castillo’s arrival comes at a pivotal moment for the electronic bill presentment and payment (EBPP) sector, a space historically dominated by rigid legacy software and notoriously slow procurement cycles. By bringing in a marketing leader who recently scaled an industrial technology startup to a billion-dollar valuation, InvoiceCloud is making a clear bet: the civic and utility billing markets are ripe for a consumer-grade, AI-driven overhaul.

Applying the Unicorn Playbook to Enterprise Go-to-Market

The strategic forces driving InvoiceCloud’s executive expansion trace back to early 2024, when private equity giant Vista Equity Partners completed a $4.0 billion take-private buyout of EngageSmart, InvoiceCloud’s former parent company. Following the transaction, Vista carved out InvoiceCloud as a standalone corporate entity, explicitly chartered to dominate the regulated EBPP space.

To execute this mandate, CEO Kevin O'Brien has spent the past year assembling an enterprise-scale executive suite. The addition of Castillo is the latest move in a broader go-to-market realignment, closely following the June 2026 appointment of Matthew Lane—a veteran of Mimecast and Ataccama—as Chief Revenue Officer. Together, they are tasked with transitioning the brand from a reliable mid-market vendor to a high-velocity enterprise powerhouse capable of unseating entrenched incumbents.

Castillo brings a highly relevant track record to this challenge. She joins the firm from Tulip Interfaces, an industrial technology company born out of the MIT Media Lab. During her nearly eight-year tenure as CMO, Castillo stewarded the company's global marketing through multiple funding rounds, culminating in a $120 million Series D led by Mitsubishi Electric Corporation that valued the firm at $1.3 billion.

More importantly, Castillo successfully redefined Tulip’s market category. She shifted the industry narrative away from capital-intensive, monolithic Manufacturing Execution Systems (MES) toward agile, composable "frontline operations."

"Madilynn understands that strong marketing starts with the customer and connects directly to how we grow," said Kevin O'Brien, CEO of InvoiceCloud, in the company's official announcement. "She’s built and scaled a global marketing organization and helped establish Tulip as a leader in its category. That experience and operating discipline will help us sharpen how we go to market and bring the value InvoiceCloud delivers to more organizations."

Overhauling the Civic Tech Landscape

The billing environment in local government and utilities closely mirrors the manufacturing floors Castillo is used to navigating: both are highly regulated, deeply process-driven, and reliant on frontline staff who are often skeptical of sweeping technological changes.

Currently, the North American EBPP market is a fragmented battleground. Competitors like Tyler Technologies maintain a monopoly-like grip on local government enterprise resource planning (ERP) systems, while ACI Worldwide and Paymentus dominate Tier-1 utilities and financial institutions. However, these legacy platforms often treat the payment interface as a static add-on, resulting in clunky user experiences and heavy professional services overhead.

InvoiceCloud has historically differentiated itself by focusing on the "digitally reluctant" payer—citizens aged 55 and older, underbanked households, and those who traditionally rely on physical checks. By offering an agnostic integration layer that sits on top of existing ERPs without vendor lock-in, the platform drives self-service digital adoption rates that are often two to three times higher than legacy portals.

"What drew me to InvoiceCloud is how much this team genuinely cares about the people it serves," Castillo noted in the press release. "I want to get even closer to our customers, understand what they're up against day to day, and help build a marketing organization that grows this business by helping them grow too."

As the company moves upmarket to target massive regional governments and nationwide property and casualty (P&C) insurance carriers, the marketing challenge evolves. It is no longer just about inbound, product-led conversion for small municipalities; it requires complex, multi-stakeholder enterprise solution selling. Castillo’s mandate will be to translate InvoiceCloud’s high digital adoption rates into a compelling enterprise narrative that resonates with chief financial officers and municipal IT directors alike.

Human-Centric AI at the Payment Layer

Perhaps the most intriguing synergy between Castillo’s background and InvoiceCloud’s product roadmap lies in the deployment of artificial intelligence. While corporate technology sectors have rushed to implement generative AI chatbots, local governments and utilities have remained understandably cautious, deterred by concerns over data privacy, statutory compliance, and operational accuracy.

At Tulip Interfaces, Castillo championed an "AI Process Engineer" initiative, upskilling frontline workers to embed AI directly into their daily production workflows rather than relying on centralized IT prompt engineering. This philosophy of "human-centric AI"—tools designed to empower employees rather than displace them—aligns perfectly with InvoiceCloud’s recent product launches.

In April 2026, the company debuted its AI-powered Billing Experience, which replaced static PDF bills with contextual, intelligent prompts that explain dynamic cost variances, such as seasonal electricity spikes. This was quickly followed by the August launch of the InvoiceCloud Service Module.

Industry data reveals that billing and payment questions can account for up to 35 percent of total inbound contact center call volume for public utilities. Rather than deploying a generic chatbot that merely deflects citizens to a static FAQ page, InvoiceCloud embedded its Service Module directly inside the payment gateway and ledger infrastructure.

Within a single conversational session, a resident can ask why their water bill increased, receive a data-backed breakdown pulled directly from meter readings, and immediately pay the balance via Apple Pay or ACH. If the AI encounters a complex dispute, it generates a summarized intent record and routes the transcript seamlessly to a human customer service representative.

Market analysts watching the GovTech space note that this type of transactional AI is proving far more palatable to risk-averse municipal leaders. By resolving inquiries directly within the payment workflow—while preserving full audit trails and human-in-the-loop handoffs—the technology provides an immediate operational bridge for cash-strapped municipalities without requiring a massive, multi-year ERP overhaul.

With a newly minted executive team, the financial backing of Vista Equity Partners, and a pragmatic approach to civic AI, InvoiceCloud is positioning itself not just as a payment processor, but as the critical engagement layer between public institutions and the communities they serve. As Castillo takes the marketing helm, the industry will be watching closely to see if the strategies that built an industrial unicorn can successfully modernize the foundational billing infrastructure of the public sector.