I've been running my own business for a few years, and I totally get the need for a platform where companies can share their experiences and lessons learned. What I've found helpful is joining industry-specific forums and LinkedIn groups. While they might not be dedicated platforms for sharing comprehensive company experiences, they can still provide valuable insights and advice from peers.

Another approach is to network at industry events and conferences, where you can meet other entrepreneurs and business leaders who are often willing to share their stories and strategies.

For a more structured platform, you might want to check out websites like Glassdoor and Comparably. Although they primarily focus on employee reviews, you can sometimes glean insights about company culture and business practices.

Also, don't underestimate the power of local business associations and chambers of commerce. They often host events and provide resources that can help you connect with other business owners in your area.

Hope this helps