RazFit vs Substy AI
Side-by-side comparison to help you choose the right AI tool.
RazFit is your AI trainer that unlocks your potential with personalized, equipment-free workouts 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 game-changing fitness revolution, engineered from the ground up for the modern individual. It is a powerful, native iOS application built entirely in SwiftUI, delivering a transformative, high-intensity bodyweight workout experience directly to your iPhone or iPad. Designed for those who believe time, space, or equipment should never be a barrier to a healthier life, RazFit unlocks your potential with workouts that last from just one to ten minutes. No gym membership, no weights, and no excuses—just you and a scientifically-backed program. The app's core intelligence lies in its AI-powered coaching, featuring two virtual trainers, Orion and Lyssa, who personalize your journey by evaluating your starting point and dynamically adapting exercises. Coupled with a robust gamification system of 32 unlockable milestones, it provides the constant motivation needed to sustain a full year of training. Whether you are a complete beginner taking the first step or an advanced athlete seeking efficient conditioning, RazFit's scalable exercise modifications and seamless iOS 18+ integration offer a fast, smooth, and accessible path to visible results.
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.