Posterum AI

Posterum AI lets you create and chat with custom AI characters. Build unique personas — whether it’s a mentor, a friend, or even a fictional hero — and bring them to life with your choice of AI models: ChatGPT, Gemini, Claude, or DeepSeek.

Two ways to chat:

Persona Mode – the AI fully roleplays as the character you designed.

Search Mode – get live web results, answered for your persona’s unique style.

✨ What you can do with Posterum AI:

Create and customize characters with their own personality, tone, and style.

Switch between multiple AI models and compare how they respond.

Use web-search mode for real-time answers shaped by your persona.

Save and manage your favorite personas, and jump back into past chats anytime.

Adjust formality, role, and behavior to make every conversation feel right.

Stay in control with privacy features like history clearing and memory settings.

Why use Posterum AI?
Unlike a standard chatbot, Posterum AI adapts to the personalities you design. Want a thoughtful coach, a playful companion, or a dramatic storyteller? You decide. And with four AI models available, you can explore different perspectives and choose the one that fits you best.

A few things to know:

Personas are fictional — don’t use them to impersonate real people.

Search Mode pulls live web data; results may vary and should be fact-checked.

Safety features like moderation and reporting are built in.

Download Posterum AI today and start chatting with characters you create yourself.