I have no idea. I am a fledgling entrepreneur who is figuring all this out for myself. I do find it easier to have a partner who complements my own skill sets and frees me up to do what I am good at. I have seen plenty of examples of people who have gone solo and done well but it comes down to you. If you have aspirations of building quality products and solely focusing on that without concern for marketing, then I think a partner helps immensely. Even the best products need to break through the cacophony of the internet to find their users and good team members (whether partners, or employees) can be really useful to help you understand how to reach people.
If you figure it out, let me know!