React. Trend.
Go viral.
The short-form video platform built for reactions. Discover what's trending, film your take, and watch your following grow with every upload.
@dance_queen_official
summer vibes check ✨ #fyp #viral
@funny.react just reacted
89.3K views · Trending now
@tech_vibes_99
AI is wild rn 🤯
Why Sirius
Built for reaction culture
Short-form video meets live commentary. React, share, discover — all in one place designed for creators who move fast.
React to Anything
Film your reaction side-by-side with any trending video. Add your voice to the moment in real-time.
Discover What's Hot
Browse curated trending content by hashtag, sound, or your personalized For-You feed. Never miss a moment.
Build Your Following
Every reaction grows your audience organically as your content connects with the right crowd.
Go Viral Fast
Sirius surfaces great reactions to the original video's audience — instant exposure to people who care.
How it works
From scroll to viral in 3 steps
No steep learning curve. Open the app and start creating in minutes.
Find a trend
Open your For-You feed or browse trending hashtags to discover the videos everyone is reacting to right now.
Record your reaction
Tap React, film your response, and add effects or text. Your face, your take — in 60 seconds or less.
Watch your audience grow
Post and let the algorithm surface your reaction to the original video's audience — instant, organic exposure.
A growing community of creators
10M+
Reactions created
190+
Countries represented
500K+
Active creators
#1
Reaction video app
Your moment is waiting.
Join a growing community of creators who are reacting, trending, and building their audience on Sirius every day.
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