Drip
A marketing automation and email service provider that was built and sold by Rob Walling.
Why It Works
Drip successfully scaled by sending 150 million emails a month, demonstrating its capacity to handle high throughput and a large customer base.
Revenue & Traction
By the time it was sold in 2016, Drip was sending 150 million emails a month.
Founding Story
Rob Walling co-founded Drip and built it up from a small operation to a significant player in the email service provider market.
Business Playbook
Focus on building a scalable product that can handle high volumes of transactions and prioritize automation to manage customer engagement effectively.
Why this works now
Mailgun's email delivery infrastructure allows Drip to efficiently manage its high volume of 150 million emails sent monthly. Rob Walling initially tapped into niche communities like r/Entrepreneur to attract early adopters, showcasing the platform’s capabilities. A significant risk Drip faces is its dependency on Mailgun for email delivery, which could affect service reliability and scalability if issues arise.
Additional Information
Drip was initially a SaaS app that grew in a competitive environment, showcasing the importance of execution and learning through experience.
Source
Podcast: Koerner Office
Episode: Trying to Quit Your Job? Don’t Start This⏐Ep. #221
Creation Date: September 15, 2025
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