Recommendations for Professional Website Redesign Specialists

Hi everyone, our company website is performing poorly—it looks dated, the user experience is confusing, and conversions are low. We know this is beyond a simple template change and requires expert help. I'm actively looking for professional website redesign specialists agencies or consultants who focus on strategy and performance, not just pretty pictures. Someone suggested a specific firm to me, but I need independent reviews and trusted recommendations before I commit.

Can anyone share their positive experiences with a specialist who delivered measurable results in terms of UX improvement, speed, and conversion rate optimization? What are the key deliverables I should expect from true specialists in this field?