RazFit vs Substy AI
Side-by-side comparison to help you choose the right product.
RazFit
RazFit is an AI-powered calisthenics app that delivers personalized, equipment-free workouts in just 1 to 10 minutes daily.
Last updated: March 18, 2026
The first and most adopted CRM + AI chatbot for OnlyFans & Fanvue agencies. Automate chats, manage fans, and scale revenue without extra staff.
Visual Comparison
RazFit
Substy AI
Overview
About RazFit
RazFit is a premium, native iOS fitness application engineered for the modern individual who demands efficiency and results without compromise. Built entirely in SwiftUI for iPhone and iPad, it delivers a seamless, high-performance experience that leverages the latest iOS 18+ technologies. The core premise of RazFit is to democratize fitness by eliminating traditional barriers: it requires no gym membership, no equipment, and remarkably little time. The app specializes in high-intensity bodyweight workouts that range from just 1 to 10 minutes, making consistent training feasible for even the busiest schedules. What sets RazFit apart is its intelligent, adaptive coaching system powered by two AI virtual trainers, Orion and Lyss, who personalize your journey by evaluating your fitness level and automatically adjusting exercise difficulty. This is complemented by a robust gamification layer featuring 32 unlockable achievement badges, designed to sustain motivation over an entire year. With support for six languages and exercises that offer easier and harder modifications, RazFit is meticulously crafted to be inclusive and effective for all fitness levels, from absolute beginners to advanced athletes seeking a efficient daily burn.
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.