Not a simple SaaS but my brother (personal finance blogger), best friend (journalist) and I (engineer - P.Eng Ontario, Canada) just started a copywriting subscription for fintechs in Canada.
Please note that we had worked with a few fintechs for about a year on a service basis and made a pivot to a subscription service just last week. This resulted in most of our existing fintech clients coming on board right away after we emailed them even though the website (https://moosecopy.com) is still under construction i.e. no writing samples on it yet. Our mixed background provides an excellent value for our clients and we have been fortunate to work with some great clients as well.
Lastly, as a few people have suggested wisely, it's a good idea to offer a service initially and then look towards building a product out of it (similar to Paul Graham's idea of doing things that don't scale during early development stage).
Please note that we had worked with a few fintechs for about a year on a service basis and made a pivot to a subscription service just last week. This resulted in most of our existing fintech clients coming on board right away after we emailed them even though the website (https://moosecopy.com) is still under construction i.e. no writing samples on it yet. Our mixed background provides an excellent value for our clients and we have been fortunate to work with some great clients as well.
Lastly, as a few people have suggested wisely, it's a good idea to offer a service initially and then look towards building a product out of it (similar to Paul Graham's idea of doing things that don't scale during early development stage).