(This link is on Starter Story which only allows three free previews per month.) I’m sharing this link just to show how niche you can get with a saturated business idea and still find success. There are tons of dating sites, but this match-making service helps non-conventional couples start a family.
“Modamily connects people who are ready to start a family and educates them on all the different ways they can create one. We help match up men and women mostly aged 25-45, both straight and LGBT and connect them with likeminded people who are looking for either a romantic relationship leading to family, a platonic co-parent (usually a gay man and straight woman), a known sperm donor, or an egg donor/surrogate.”
Business Idea: Don’t aim for a general audience. That is far too competitive. Start hyper-focused and it’ll be much easier to gain traction. Seth Godin calls this a Minimum Viable Audience.