RazFit vs Substy AI

Side-by-side comparison to help you choose the right product.

RazFit is your AI-powered personal trainer for effective, equipment-free workouts tailored to fit any schedule, transforming your body in minutes.

Last updated: March 18, 2026

Scale agency revenue. Automate chats, manage fans.

Visual Comparison

RazFit

RazFit screenshot

Substy AI

Substy AI screenshot

Overview

About RazFit

RazFit is an innovative, native iOS fitness application designed for iPhone and iPad that helps users achieve their fitness goals with high-intensity bodyweight workouts that can be completed in just 1 to 10 minutes a day. Built entirely in SwiftUI, RazFit requires no gym equipment, enabling users to work out anywhere, anytime. The app is suitable for individuals of all fitness levels, from complete beginners to advanced athletes, making it versatile and accessible. With AI coaching provided by two virtual trainers, Orion and Lyss, users receive personalized workout plans that adapt to their evolving fitness levels. The gamification aspect, featuring 32 unlockable milestones, not only motivates users but also fosters a sense of achievement throughout their fitness journey. RazFit leverages cutting-edge iOS technologies to provide a seamless and engaging user experience. Users can start their journey with a 3-day free trial, allowing them to experience the benefits without any commitment.

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.

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