Building Cosmo: A More Personal Way To Chat Online
For the past year, I’ve been working on an idea that kept getting louder in my head. Most social apps feel the same. Endless feeds, polished photos, and conversations that never feel quite real. I wanted something that let people show their personality without the pressure of being on camera, but still feel alive and expressive.
That is how Cosmo started. https://cosmochatapp.com
Cosmo is a social video chat app where your real-time expressions animate a 3D avatar. When you smile, your avatar smiles. When you raise an eyebrow or laugh, it does too. It feels surprisingly personal, even though you are behind a character you designed.
I built the first prototype mainly out of curiosity. Could AR face tracking actually make a chatroom feel more human, even when no one is showing their real face? Turns out, it could. The early tests were more playful and weird than I expected, and that convinced me to keep going.
The more I built, the more clear the purpose became. There are a lot of people who want to meet new friends or hang out casually online, but they do not want full video. Some prefer the creative aspect of customizing a character. Some want a bit more privacy. Some just want something that feels lighter and less filtered than the usual social platforms.
Cosmo tries to give them that.
A lot of thought has gone into safety too. The app includes AI chat moderation to keep conversations respectful and to react quickly when things cross the line. It is not perfect, but it is a real step toward a better vibe in open chat environments.
Another surprise was how much people enjoyed making short videos as their avatar. I originally built it as a side feature and it turned into something users kept asking for. So now you can record clips of your avatar acting out your expressions and share them on TikTok, YouTube, or anywhere else.
I am launching Cosmo publicly and I want to get honest feedback from people who build things and understand how hard it is to shape a new idea into something useful. If you try it, I would love to hear what feels rough, what feels fun, and what you would add next.
If you are curious, check it out. My hope is that it becomes a small corner of the internet where meeting people feels a bit more genuine and a lot more creative.
