MobMate WhispTalk – Zero-Cloud Voice Chat Toolkit

Reactions make voice chat more fun.

Laughter, "got it," thumbs up. A Zero-Cloud voice chat toolkit that delivers quick reactions to VC via TTS.

Ever had a moment where you couldn't say anything in VC?

Late-night gaming. Your voice is tired. One of those listen-only days.

Typing in chat feels too slow, but staying completely silent feels a little lonely.

With MobMate, you can send short replies and laughter to voice chat via TTS.

They'll know you're laughing.

They'll know you agree.

They'll know you're listening.

MobMate makes VC reactions feel effortless.

Main features

1. Send quick reactions to voice chat

"Got it," "Nice," "lol" — send short replies and laughter to VC instantly via TTS.

Short sounds like "ah" and "mm" are picked up too, keeping the conversation flowing.

2. Radio Chat sends preset reactions instantly

Fire off your go-to phrases from global hotkeys or an overlay.

Tactical callouts, common replies, prepared foreign-language lines — all one tap away.

3. Join voice chat without using your real voice

Your speech is recognized locally and read aloud with anonymous TTS.

Even when you can't or don't want to speak, you can still react.

4. Speech recognition tuned for in-game chat

Designed for short exchanges and callouts without breaking the tempo.

Supports multilingual VC: Japanese, English, Chinese, Korean, and more.

5. Hearing shows live subtitles

Desktop audio from Discord, VRChat, and in-game VC is transcribed in real time.

Great for following foreign-language voice chat or fast-spoken instructions.

6. Translation for multilingual VC

Translation works on both the speaking-assist side and the Hearing side.

Different languages? You can still get your reaction across.

7. VRChat OSC Chatbox output

Speech recognition results can be sent to VRChat's Chatbox via OSC.

Share short replies and reactions inside VRChat, even without speaking.

8. OBS / OSD subtitle display

Use the subtitle page as an OBS browser source to show reaction subtitles on stream.

Viewers can follow the conversation too. An in-game OSD display is also available.

9. Zero-Cloud design

Core features run on your PC locally. No constant cloud uploads of voice or text.

No ping impact. Safe to use mid-game.

Highlights of v2.1.5

• Linux / Steam Deck version added

• Short fillers and backchannel reactions are easier to pick up

• Improved intonation reproduction for VOICEVOX playback

• VRChat OSC, OBS subtitles, Hearing, Radio Chat, translation, and pending speech are easier to use on both Windows and Linux

• Setup wizard added to make first-time setup easier

You can also check multilingual TTS and extra setup steps in the store images.

Free demo available

A free demo is available now.

Before buying, you can check whether it works on your own PC and whether it fits your play style.

The demo lets you try the core features.

It is also the easiest way to check subtitle speed and audio routing on your own setup before buying.

※ The demo has a 15-minute session limit. The full version does not have this limit.

Setup notes

• The first-time setup wizard helps you check your microphone, TTS, and audio routing step by step

• If you plan to use global hotkeys, the Discord desktop app tends to work better than browser Discord

• A physical microphone is not always required; MobMate can also be routed into voice chat through virtual audio devices

• Device behavior and subtitle speed can vary by PC environment, so trying the demo first is recommended

Supported platforms

• Windows

• Linux / Steam Deck

• Discord

• VRChat

• VRChat OSC Chatbox

• OBS (browser-source subtitles)

• Various multiplayer games that can use virtual audio devices

By combining it with virtual audio environments such as VB-Audio or VoiceMeeter, it can work with many different voice chat apps.

Languages and audio support

The UI supports Japanese, English, Chinese (Simplified / Traditional), and Korean.

For speech recognition, subtitles, and translation, the feature side can handle many more languages.

Supported TTS engines

• VOICEVOX (Japanese)

• Piper-Plus (multilingual TTS)

• Kokoro / MOSS TTS

• Windows system voices / Linux audio output environments

Things to note

• Built for short reactions, callouts, and quick responses — not long-form transcription or meeting notes

• Recognition accuracy depends on surrounding noise and speaking style

• Hearing, OSC, subtitles, and TTS can be affected by your audio devices and desktop environment

• Speaker matching may become less accurate in noisy environments

Great for moments like these

• Late-night gaming when you can't speak up, but still want to react

• Listen-only sessions where you'd love to send a laugh or a nod

• Tired voice days when short replies are all you need

• Foreign-language VC where translated reactions help bridge the gap

• Streaming sessions where viewers want to see subtitled conversation

Reactions make voice chat more fun.

MobMate is a tool that makes the vibe in VC just a little better.

Support / technical information

This product includes whisper.cpp (MIT License)