Build a private AI companion in Venice

Why a private AI companion

The AI companion space is growing fast, with people turning to digital companions to practice presentations, work through personal challenges, or simply think out loud without judgment. The catch is privacy. When you use mainstream services, those intimate conversations get logged and processed, and the FTC has warned about companies using customer data to train their models.

Venice takes a different approach. It is an end-to-end encrypted platform that stores your conversations locally in your browser rather than on company servers. That means you can build a companion with whatever personality you want and keep every exchange private.

Generate your character instructions

Start a new chat and pick a model from the Venice catalog. Different models offer different levels of intelligence, functionality, and personality, so choose based on what you need. In the video, Venice Small is used for a quick result.

Ask the model to draft a framework for your companion. The example prompt used here:

Help me create character instructions for an AI companion that offers words of encouragement in times when I need some support. For example, before I give a big presentation.

The model returns a structured framework covering things like empathetic presence, motivational support, problem-solving, adaptive guidance, and confidence building, along with an example response. This output becomes the raw material for your companion.

Create the character and autogenerate

Copy the entire framework, including the example response. Then open the sidebar and click Characters. Here you will find public characters shared by others, plus any characters already in your account.

Create a new character and give it a name (in the video, "Buddy"). Paste the framework you copied into the description, then click Autogenerate. Venice uses the name and description to produce a photo, a refined description, and full character instructions covering role, background, personality traits, and role-playing instructions.

Configure intro, knowledge, and model

Once the character is generated, you can fine-tune the supporting details. Add an intro statement so the companion opens the conversation a certain way. If you want your character to draw on a body of reference material during chats, upload it as context, though simple use cases may not need any.

Decide whether web access is enabled, pick the model the character will run on, choose whether to show or hide the thought process, and optionally assign a voice. These settings shape how the companion behaves and sounds in every conversation.

Tune behavior with advanced settings

Open the advanced settings to adjust how the model generates responses. Raising the temperature adds more randomness, giving you less predictable and more varied replies. Leaving top P higher keeps the outputs diverse.

In the demonstration, raising the temperature slightly produced an encouraging, natural companion. When asked about presentation nerves, "Buddy" responded with reassurance, suggested visualizing success, and asked follow-up questions, which kept the conversation feeling supportive and responsive.

Refine, explore, and delete privately

If the responses are not quite right, head back into the character's instructions and adjust them. You can keep editing until the companion behaves the way you want. The public characters library is also worth browsing, since a companion close to what you want may already exist.

Your conversations with each character appear in the left menu. When you delete a conversation, it is gone for good, because Venice does not store your chats on its servers. Everything lives locally in your browser and is end-to-end encrypted in transit, so your exchanges stay private.

Key takeaways

• Use a Venice chat model to generate a structured character framework before building the companion.
• The Autogenerate button turns your name and pasted description into a full character with photo, description, and instructions.
• Model choice, voice, temperature, and top P all shape your companion's personality and response style.
• Conversations are end-to-end encrypted and stored locally, so deleting a chat removes it for good.