We did write an article here: https://medium.com/emailoctopus/the-road-to-one-billion-emails-4ed7d441e190 https://medium.com/emailoctopus/the-road-to-one-billio

We did write an article here: https://medium.com/emailoctopus/the-road-to-one-billion-emails-4ed7d441e190 https://medium.com/emailoctopus/the-road-to-one-billion-emai... Although in short, we built a product to serve our own need, launched it totally free for everyone and ended up gaining around 2000 users very quickly. Within a year we had grown MRR to the £3k mark, so we contracted alongside running this 2 days a week. Now, another further year on we're full-time with a few employees.