Stuck on domain name strategy: How to handle existing brand conflict?

I'm feeling incredibly frustrated right now, honestly, I've hit a wall and could really use some collective wisdom. I recently launched my SaaS, and things were finally starting to pick up, getting some initial traction and positive feedback. I was feeling great, ready to double down on marketing, but then I stumbled upon a major roadblock that's completely thrown a wrench into my plans. It turns out there's an older, seemingly less active brand or product out there with a name almost identical to mine. They have a nearly identical domain as well – think a '.co' instead of my '.com', or just a hyphen difference. Their social media presence is minimal, almost dormant, but they exist. This discovery has honestly kept me up at night. I'm worried sick about brand confusion, potential legal issues down the line, and how this could dilute all my hard-earned SEO efforts. My entire brand identity feels compromised, and I've spent hours trying to figure out a path forward, feeling completely stuck and desperate for a solution. So, what's the best domain name strategy to navigate this mess? Should I seriously consider a complete rebrand, which feels like a huge setback at this stage? Or should I attempt to acquire their domain, even if they're not actively using it, which could be costly and time-consuming? Is there a viable way to coexist and differentiate effectively without constantly risking future problems or confusion for my users? Any advice on how to proceed would be a lifesaver. Help a brother out please...