Trendline and Inbox Pros – Redefining the Email Marketing Services Landscape

Alex Williams

3 minute read

With the strategic acquisition of Inbox Pros, Trendline Interactive is now the clear leader in providing enterprise organizations with comprehensive, end-to-end email marketing services.

AUSTIN, TX – Full service email marketing agency, Trendline Interactive, announced today the acquisition of Inbox Pros, adding deliverability, privacy and compliance to its service offerings. Already a best-in-class provider of email marketing services including strategy, creative, technology, and analytics, the acquisition of Inbox Pros firmly establishes Trendline as the leading full-service email marketing agency in the industry.

“Consumers today demand increasingly relevant and personal email experiences. At the same time, new privacy laws, such as GDPR, require companies to rethink how they handle consumer data. It is imperative that deliverability, privacy and compliance experts work directly with marketing strategists to help enterprises navigate this increasingly complex email marketing landscape,” said Morgan Stewart, Trendline CEO and co-founder. “The acquisition of Inbox Pros adds a critical component that email marketing and digital agencies have traditionally ignored.”

Founded in 2014, Inbox Pros quickly established itself as the industry-leading expert in email deliverability, privacy and compliance, as well as deliverability training and certification. “You can build your email database, plan out a great strategy, and develop spot on creative, but if your messages don’t get to the inbox it’s all for nothing,” said Chris Arrendale, Trendline’s new Chief Privacy Officer and founder of Inbox Pros. “That’s where Inbox Pros steps in.”

When Morgan Stewart and Andrew Kordek started Trendline Interactive in 2010, it was based on the belief that bringing the best talent together with expertise across strategic, operational, technical and creative functions would allow them to dramatically improve the effectiveness of enterprise email programs. Clients like AARP, USA Today, Allstate, Carnival Cruise Lines, WebMD, and Banfield Pet Hospital can attest to that.

Email is a lot harder than it looks. Our team of experts has multiple examples of triple digit performance improvements for some of the largest brands in the world,” stated Andrew Kordek, Trendline’s Chief Strategist and Co-founder. “Inbox Pros’ ability to quickly diagnose and fix complex deliverability issues expands the toolset we have available to drive real results.”  

Trendline Interactive acquired Inbox Pros with financial support from Growth Catalyst Partners (GCP), a lower-middle market private equity firm that invests in information, marketing and tech-enabled services businesses. “Email remains the backbone of marketing automation platforms and is a critical marketing channel for large enterprise organizations.  The combination of Trendline Interactive and Inbox Pros helps create a leading middle-market email marketing agency that is well positioned to help large enterprises navigate the increasing growth and complexity of the segment,” said James O’Callaghan, Vice President of GCP. “We’re excited to make the announcement official and leverage our relationships to further accelerate Trendline’s growth.”

Upon learning of the announcement, Nick Einstein, VP of Research & Principal Analyst for research firm The Relevancy Group commented, “including deliverability, privacy and compliance expertise into any comprehensive email services offering just makes good business sense this day and age, especially for enterprise organizations dealing with data across the globe.”

About Inbox Pros:

Founded 2014 by Chris Arrendale, Inbox Pros is the leading email deliverability and privacy consulting firm in the United States. They evaluate mailing infrastructure set-up, email authentication, sender reputation, bounce and complaints, list quality and permissions, email compliance, and message content. Inbox Pros also provides ISP remediation, domain specific volume and policy guidelines, and email industry updates. The world’s first and only Email Deliverability Certification Class. Inbox Pros is a member of M3AAWG, IAPP, EEC, AMA, and other professional email organizations.

About Growth Catalyst Partners

Growth Catalyst Partners, a lower middle-market buyout firm headquartered in Chicago, was founded by veteran private equity investor Jim TenBroek and leading investment banker Scott Peters, who have led hundreds of transactions and successful investments in services businesses for over 20 years. GCPs strategy is to target growth segments of industries and identify market leading companies with break-out potential. GCP often partners with top executives within those industries, and provides capital and expertise to the incumbent management teams of the targeted businesses. For more information, visit

Please contact Stephen Ryan, Vice President of Marketing at with any questions.

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About the Author(s)

Alex Williams

SVP, Practice Lead, Cloud Consulting. As one of Trendline’s first hires, Alex built out Trendline’s full service email practice. He is a true full stack email marketer – from strategy and creative to technology and analytics. Widely recognized as an email strategy and creative expert, as an SVP at Trendline, Alex brings his passion and creative problem solving skills to Trendline clients. Alex has had a hand in just about every account that’s ever been on Trendline’s roster. He is a frequent keynote speaker on topics related to design, technology, and their intersection in the inbox. Follow Alex on Twitter

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