RazFit vs Substy AI
Side-by-side comparison to help you choose the right product.
RazFit is your AI-powered trainer for quick, effective bodyweight workouts anywhere, transforming your fitness in just minutes a day.
Last updated: March 18, 2026
Scale agency revenue. Automate chats, manage fans.
Visual Comparison
RazFit

Substy AI

Overview
About RazFit
RazFit is a revolutionary native iOS fitness app, expertly crafted entirely in SwiftUI for seamless performance on iPhone and iPad. It is tailored for anyone seeking to enhance their fitness levels without the need for a gym or specialized equipment. With high-intensity bodyweight workouts ranging from just 1 to 10 minutes, RazFit empowers users to squeeze in effective training sessions anytime, anywhere. The app features two AI-driven virtual trainers, Orion and Lyss, who not only assess your fitness level but also adapt exercises to suit your needs dynamically. A robust gamification system with 32 unlockable milestones keeps you engaged and motivated throughout the year. Whether you're a complete beginner or an advanced athlete, RazFit is designed to accommodate all fitness levels, ensuring you can progress at your own pace. With the latest iOS 18+ technologies, users can expect a fast, smooth, and responsive experience. Jumpstart your fitness journey today with a 3-day free trial and unlock your potential!
About Substy AI
Substy is the first platform to combine a full CRM and an autonomous AI chatbot in a single system built exclusively for OnlyFans and Fanvue agencies - and today it's the most widely adopted solution on the market.
The CRM is a complete agency workspace: add your chatters with custom access levels, let them chat directly from the platform, create and track tracking links (TikTok, Reddit, Telegram), classify fans automatically into Spenders, VIPs, Newbies, and Timewasters, and monitor every chatter's performance in real time - revenue, response rate, average basket.
The AI Chatbot runs 24/7 without human input. It sells PPV, handles objections, re-engages cold fans, and adapts its tone in any language - fully autonomous, not a co-pilot.
The hybrid mode is the game changer: AI handles fans below a spend threshold, human chatters take over only for VIPs. Agencies cut costs by 25% while automating 90% of messages.
Compatible with OnlyFans and Fanvue.