These are the tools I use to run online businesses either for myself or for clients. I currently use (or have used) and personally recommend each and every one of these products.
SendOwl for Selling Products
The easiest (and most scalable) way to sell products online. SendOwl connects to your Stripe or Paypal account and handles everything else. I switched from Gumroad to SendOwl for its better uptime and pricing.
Drip for Marketing Automation and Mailing Lists
I’ve tried all the others. This beats Mailchimp, Infusionsoft, ActiveCampaign, Marketo, Convertkit, CampaignMonitor… I’m constantly evaluating the new entrants to the market and the latest offering from the incumbents but this wins every time.
DigitalOcean for Hosting (Free $10 using this link)
Cloud computing with a beautiful interface. Simple, yet powerful.
SEMRush for Search Engine Marketing and Business Intelligence
I’ve used tools from SEMRush for over a decade, they’re the best in the business.