Founder Flywheel
founderflywheel.com
Research-as-a-service newsletter for entrepreneurs.

Done-for-you cold email and AI-assisted lead generation for B2B companies, co-founded with Ryan Doyle.
Visit Sales.co ↗Done-for-you cold email and AI-assisted lead generation for B2B companies, co-founded with Ryan Doyle. Sales.co is a productized services product built by indie maker Jakob Greenfeld.
Jakob Greenfeld has publicly reported $90K/mo (2024) for Sales.co. Revenue figures are self-reported and not independently verified by IndieMakerList. See the indie maker revenue leaderboard.
founderflywheel.com
Research-as-a-service newsletter for entrepreneurs.
opportunities.so
Newsletter of researched business opportunities and ideas for entrepreneurs.
newsletterspy.io
Data on Substack newsletters and what is growing.
Mini-tool serving tweet inspiration prompts; acquired by Tweet Hunter.
Data tool that analyzed what was selling on Gumroad.
Data on indie products for makers and indie investors.
Micro-SaaS surfacing early trend signals for investors, entrepreneurs and marketers.
Sales.co is a productized services product: Done-for-you cold email and AI-assisted lead generation for B2B companies, co-founded with Ryan Doyle.
Sales.co was made by Jakob Greenfeld, Physicist turned permissionless entrepreneur, co-founder of Sales.co. Jakob Greenfeld has also built Founder Flywheel, Opportunities.so, Newsletter Spy, What to Tweet.
Yes. As far as IndieMakerList knows, Sales.co is still active and run by Jakob Greenfeld at sales.co.
Sales.co has publicly reported $90K/mo (2024). This figure is self-reported by the maker and not independently verified.
conversionfactory.co
Subscription-based product marketing and conversion agency for growing SaaS teams.
draft.dev
Technical content agency that writes developer-focused articles for software and devtools companies.
thepodcastconsultant.com
Podcast editing and production service for financial and business podcasts, acquired in 2023.
rise25.com
Done-for-you B2B podcast service that helps founders use podcasts for growth and networking.
designjoy.co
One-person unlimited design subscription for startups with a flat monthly fee.
Productized content marketing and blog writing service.