RazFit vs Substy AI
Side-by-side comparison to help you choose the right AI tool.
RazFit is your AI trainer for quick, equipment-free workouts that transform your body in minutes.
Last updated: March 18, 2026
Scale agency revenue. Automate chats, manage fans.
Visual Comparison
RazFit

Substy AI

Overview
About RazFit
RazFit is a revolutionary fitness app designed for the modern, busy individual. It is a native iOS application built entirely in SwiftUI, delivering a fast and seamless experience on iPhone and iPad. The core promise is simple: achieve a real body transformation with high-intensity bodyweight workouts that take just 1 to 10 minutes per day. No gym membership, equipment, or lengthy time commitments are required. RazFit is engineered for all fitness levels, from absolute beginners to advanced athletes, thanks to its intelligent adaptability. The app features AI-powered virtual coaches, Orion and Lyssa, who personalize your journey by evaluating your fitness and automatically adjusting exercises. A robust gamification system with 32 unlockable achievement badges provides year-long motivation. By leveraging the latest iOS technologies, RazFit offers a premium, equipment-free training solution that fits into any schedule, anywhere.
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.