Harry Dry is a British solo entrepreneur and the creator of Marketing Examples, the self-proclaimed #1 marketing newsletter with 130,000+ subscribers. Built from a pre-marathon epiphany in Paris in May 2019, his newsletter distills world-class marketing and copywriting into sharp, visual, bite-sized breakdowns sent every Monday. With zero paid ads, he grew an audience of 110,000+ across platforms, earned the endorsement of writer David Perell who called him 'the best copywriter I know,' and turned a $1,000 investment into a full-time business - all while operating as a one-man show.
Katelyn Bourgoin is a Canadian serial entrepreneur and the creator of Why We Buy, a buyer psychology newsletter with 280,000+ subscribers that generates multi-seven-figure revenue. Known as 'The Customer Whisperer,' she spent years as a 4x founder - including a VC-backed startup that ended in bankruptcy - before turning her hard-won customer insight expertise into a media and education business. She teaches marketers to decode why people buy through her newsletter, digital products, and the wildly popular Un-Ignorable Challenge, which sold 200 spots in 6 minutes and generated $116,000 in a single launch.
Keap (formerly Infusionsoft) is an all-in-one CRM and marketing/sales automation platform built exclusively for small businesses. Founded in 2001 in Arizona by Clate Mask and the Martineau brothers, Keap helps entrepreneurs automate follow-up, manage contacts, process payments, and grow revenue through a unified platform. With over 31,500 customers, $85M+ in annual revenue, and a history of processing billions in payments, Keap is a leading SMB-focused CRM that was acquired by Thryv Holdings in October 2024 for $80M.
Klaviyo is a Boston-based AI-first B2C CRM platform that unifies email marketing, SMS, push notifications, and customer service into a single data-driven system. Founded in 2012 by Andrew Bialecki and Ed Hallen, it went public on the NYSE in September 2023 and crossed $1.2B in annual revenue in 2025, serving 193,000+ brands in 100 countries. Klaviyo's core edge is its built-in Customer Data Platform that manages 7.3 billion customer profiles and processes 2.5 billion events daily, enabling hyper-personalized marketing at scale for direct-to-consumer brands.
The no-fluff guide to building a newsletter people actually open. Published by YesPress, it aggregates expert insights, case studies (Morning Brew, Lenny's Newsletter), and statistical trends to help creators start, grow, and monetize email lists in 2026.