AI Roleplay,
Without the Setup
Museris is the easy-to-use AI roleplay app you can run on any device. Create characters, craft worlds, and have conversations that go as deep as you want — with any AI model you already use, or with Museris Cloud built right in.
Characters
Build Characters That Feel Alive
Characters in Museris are highly customizable — rich, detailed, and built to stay consistent no matter how long the conversation runs. Give them a strong voice and a clear identity, and the AI will keep them in character from the first message to the last.
- ✓ Rich character profiles with avatars, biographies, and custom greetings
- ✓ Characters stay recognizable across scenes and longer chats
- ✓ Import community-standard PNG character cards in seconds
- ✓ Discover and download characters from the Museris.com community
Your Identity
You're Part of the Story
Most AI chat apps treat you like an invisible user behind the screen. In Museris, you don't fill out a separate "user profile" — you pick a character from your roster and play as them. The same characters you create and chat with are the ones you can step into yourself. There's no special second-class system for who you are. You're just another character in the cast.
- ✓ Pick any character from your roster to play as in a conversation
- ✓ Download a character from the community and play as them yourself
- ✓ Switch who you are between conversations — same roster, total flexibility
- ✓ Characters respond to who you are, not just what you typed
Roleplay
Immersive, Multi-Character Roleplay
Chat one-on-one or bring an entire cast into the same conversation. In group scenes, Museris uses the AI itself to decide who speaks next — reading the flow of the conversation and picking the character whose response makes the most sense.
- ✓ One-on-one chats and full group conversations
- ✓ AI-driven speaker selection keeps group scenes feeling alive
- ✓ Full markdown rendering in all messages
- ✓ Fine-tune individual responses without breaking the scene
Worldbuilding
Build Worlds That Feel Lived In
Keep places, factions, history, and important details organized so your world stays coherent. Add lore to the conversations that need it, leave it out where it does not, and keep each story focused.
- ✓ Keep worldbuilding organized in separate lorebooks
- ✓ Add only the lore that matters to each chat
- ✓ Turn individual lore entries on or off as needed
- ✓ Download lorebooks from the Museris.com community
Prompt Templates
Shape the Experience Your Way
Museris gives you deep control over how conversations are framed behind the scenes, powered by a flexible templating language. Customize the system prompt to get the AI responding in exactly the tone and style you want — whether that's a grounded adventure, a specific creative fiction setting, or anything else you have in mind.
- ✓ Powered by a flexible templating language
- ✓ Customize the system prompt to dial in tone, style, and narrative rules
- ✓ Preview changes before you commit to them
Your AI, Your Rules
Use the models and services you already trust, or skip the setup and let Museris Cloud handle it for you.
Bring Your Own Endpoint
Already have a favorite provider, or running your own local setup? Museris works with any OpenAI-compatible API — including Ollama, LM Studio, and other self-hosted options — so you can keep your conversations completely private if that matters to you.
- ✓ Works with any OpenAI-compatible provider
- ✓ Run fully offline with Ollama, LM Studio, and more
- ✓ Save multiple presets for different use cases
Museris Cloud
If you want the easiest path, Museris Cloud is built in. Create an account, log into Hub from the app, and start chatting.
- ✓ Fast setup with no extra tools
- ✓ Managed models available out of the box
- ✓ One key tied to your account
The Small Details Matter
Museris includes the quality-of-life features that make long sessions smoother, faster, and more enjoyable.
Slash Commands
Stay in flow with quick in-chat actions for steering the conversation, retrying replies, and managing scenes without breaking immersion.
Message Swipes
If a reply misses the mark, move through alternate responses and pick the one that fits the moment best.
Per-Message Instructions
Guide a single response in the direction you want without rewriting the whole conversation setup.
You’re Part of the Story
You're defined just like every other character — with a name, a biography, and a voice the AI treats as part of the story.
PNG Card Import
Bring in existing characters from the wider roleplay community without rebuilding them by hand.
Instruct Chat Mode
When you want a straightforward AI assistant instead of a roleplay scene, switch to a clean chat mode built for direct back-and-forth.
Available Wherever You Create
Use Museris on Windows, macOS, Linux, and Android today. iOS is planned next.
Ready to start your story?
Download Museris and go from install to first conversation in minutes.