A stream pet is a character on stream that reacts to things happening in chat. Depending on the software you use, your pet might open and close its mouth when TTS plays, lip sync to messages, respond to alerts, or even answer viewer questions.

There are several ways to set up a TTS pet. Some options use a Live2D model with VTube Studio, while others use PNGs or simple image animations.

In this guide, we’ll compare the best TTS pet software for streaming, including their features, pros, cons, and what type of streamer each option is best for.

1. Blerp

Best for: VTubers who want an interactive TTS pet with real-time lip syncing, custom voices, alerts, and viewer interactions.

Blerp lets you turn almost any Live2D model into a TTS pet by connecting it to VTube Studio. Your pet can speak, lip sync, react to alerts, and answer questions from your viewers.

You can choose from more than 500 TTS voices, connect your Live2D model, and add the Blerp browser source to OBS. Once everything is connected, your pet can automatically react whenever a supported TTS message or alert plays.

Blerp also supports multiple pets, so you can give each character its own voice and personality.

Features

• Connects to VTube Studio

• TTS lip syncing

• AI TTS support

• Works with OBS through a browser source

• 500+ TTS voices

• Supports multiple pets

Pros

• TTS lip syncing

• Works with VTube Studio

• 500+ TTS voices

• Can use custom Live2D models

• Pets can answer viewer questions

• Supports up to 3 pets

• Can react to alerts and viewer interactions

• Works across multiple streaming platforms

Cons

• Requires VTube Studio

• Requires a compatible Live2D model

• Advanced features require Blerp Unlimited

2. Audio Reactive PNG + TTS

Best for: Streamers who want a simple TTS pet without using a Live2D model.

If you don't need a fully animated Live2D character, you can create a TTS pet using PNG avatar software that reacts to audio.

These programs typically use two or more images of your character. One image shows your pet in an idle or closed-mouth state, while another shows the pet talking. When the software detects speech or audio, it switches between the images to create a simple talking effect.

The avatar software doesn't necessarily provide the TTS itself. Instead, you can pair it with a separate TTS service such as Blerp or TTS Monster. Depending on the software, you'll need a TTS service with an OBS browser source or another way to route the TTS audio into the avatar software.

Some popular options in this category include VeadoTube and PNGTuber+.

Features

• PNG-based characters

• Image swapping

• Talking/mouth-open animations

• Simple expressions

• OBS support

• No Live2D model required

• Low system requirements

Pros

• Easy to set up

• Beginner-friendly

• Doesn't require Live2D

• Works with custom artwork

• Low system requirements

• Many options are free

Cons

• Limited compared with Live2D

• Fewer animation options

• More advanced movement can require layered artwork

• TTS integration varies depending on the software

3. VTS P.O.G.

Best for: Streamers who want to connect TTS to different types of avatars and pets.

VTS P.O.G., short for VTube Studio Processor of Gossip, is a TTS and pet-integration tool designed to connect text-to-speech with different types of streaming avatars. It supports Live2D models in VTube Studio, PNG pets through browser sources, and 3D pets through VMC and OSC. 

VTS P.O.G. can also work with different streaming and TTS tools, making it a flexible option if you already have a specific setup in mind.

Features

• TTS integration

• VTube Studio support

• PNG pet support

• 3D pet support

• VMC and OSC support

• Multiple TTS services

• AI pet interactions

• Twitch and YouTube integration

• Mix It Up and Tangia integrations

Pros

• Supports multiple pet formats

• Works with Live2D, PNG, and 3D pets

• Can connect to different TTS services

• Flexible for more advanced setups

Cons

• More complicated than simple browser-based solutions

• May require additional software

• Designed primarily for users who are comfortable configuring streaming tools

• Costs $15 USD or more as a one-time purchase