That sounds like the start of a strong value proposition! Here's how you could expand or refine it depending on the purpose:

💼 Landing Page Headline:
"Looking for a Reliable Outsourcing Partner? We Deliver Web Design, Development & More — Tailored for Agencies!"

🔧 Subheading:
"White-label web solutions, fast turnaround, and agency-first support to help you scale effortlessly."

📣 Social Media Post:
"Hey Agencies! Tired of juggling too much in-house? Partner with us for reliable, white-label web design, development, and more. Focus on growth—we'll handle the heavy lifting. Let's talk!"