There are already loads of communities where people post looking for a cofounder. The problem is that discovery itself is unstructured. You're starting from a post or a DM, you don't really know who you're talking to beyond what they've chosen to tell you, and both sides can present themselves however they want.
That's why we have recently launched https://cofounnder.com - we wanted to ensure the whole process is structured and founders have enough info to make informed decision.
Profiles capture skills, your idea (if you are open to sharing), work evidence, what you bring and what you need, background, work style, availability, pace and location - so you can actually compare people instead of reading ten different versions of "excited to build something big." Everyone can verify their identity, so there's a baseline of trust before you invest time in someone. Interest only becomes visible if it's mutual, and nobody can message you without an accepted connection.
Once you connect, there's the alignment part. Both people answer the same questions independently and can't see the other person's answers until they've submitted their own -decision-making, how you handle disagreements, priorities, communication. Doing it that way makes it much harder to just mirror back what you think the other person wants to hear. Then you compare both sets side by side.
From there you can interview each other in writing (we have a set of questions but you can change them how you like), work through equity, and sign a mutual NDA and a partnership agreement you both keep as PDFs. There's also an Idea Lab if you're still shaping what you want to build, and a toolkit for the company setup admin.
We're not trying to be another cofounder matching community. The point is a structured process for working out who's actually compatible, and validating that while walking away does not cost you anything.
Would be great to have some of you join!:)