First and Last — Web & Interactive Tools – Engineering high-performance Next.js ecosystems and grounded AI interfaces

Summary: First and Last develops ultra-fast, SEO-first Next.js 16 websites and secure, state-driven web applications using a strict stack including React 19, TypeScript, Tailwind v4.1, and Supabase. Their tools feature client-side interactive logic like ROI calculators and lead-generation, alongside hallucination-free AI interfaces anchored to business data.

What it does

It builds high-performance web architectures and functional ecosystems by combining Next.js 16 with modern frameworks and libraries to create scalable SaaS MVPs and interactive business tools. The AI interfaces integrate deterministic logic to ensure data accuracy.

Who it's for

Founders and businesses seeking transparent, high-performance web systems and precise digital tools to quantify value and improve online presence.

Why it matters

It addresses the lack of transparency and performance in typical web design by providing measurable, scalable, and SEO-optimized solutions grounded in a strict technology stack.