Everything You Need to Build AI Companions
From personality design to voice cloning to multi-bot group chats — SoulBox gives you the tools to create AI characters that feel real.
Deep Personality Engine
Custom Personas
Name, age, gender, backstory, location, helpfulness level. Every trait shapes how the bot responds.
Persistent Memory
Bots remember facts from past conversations. Memory is extracted automatically and stored per-bot.
Mood System
Set bot mood from 0-100 with text reasons. Mood affects tone, word choice, and conversational energy.
NSFW Control
Per-bot and per-conversation NSFW toggles. Hard-enforced LLM guardrails, not just suggestions.
AI Model Choice
Pick the AI model behind each bot from multiple providers. Switch models anytime without losing personality or memory.
Public & Private
Keep bots private or publish them to the community. Discover bots made by others.
Voice Cloning & Text-to-Speech
Voice Cloning
Upload a WAV or record directly. SoulBox clones the voice for advanced text-to-speech synthesis across multiple providers.
Audio Normalization
EBU R128 loudnorm ensures consistent volume across all voices. Two-pass ffmpeg processing with LUFS targeting.
Multi-Provider TTS
Multiple TTS engines with automatic guardrail failover between providers. If one provider blocks content, another picks up seamlessly.
Karaoke Sync
Words highlight in real-time as the bot speaks. Sentence-level streaming with precise word timing.
Voice Preview
Preview and compare original vs. normalized audio. Gender tagging, NSFW classification, and speed control.
AI Voice Generation
Generate new voices with AI. Describe the voice you want — tone, age, accent — and SoulBox creates it.
Multi-Bot Group Conversations
Up to 20 Bots
Drop multiple bots into a room. Give them a topic and watch them debate, joke, or argue in character.
Multi-User Participation
Invite other users to join as live participants. They can interject, direct the conversation, or just watch.
Full Audio Playback
Every bot speaks in its own cloned voice. Chat, avatar, presenter, and live view modes.
Templates
Save any conversation setup as a reusable template. Same cast, same settings, new topic.
Per-Conversation NSFW
Toggle NSFW mid-conversation. The LLM instruction updates immediately on the next prompt.
Continuation Prompts
Steer the conversation with new prompts. Target specific bots or let all of them respond.
Physical Devices & External Audio
ESP32-S3 Firmware
Custom PlatformIO firmware. Streams TTS over Wi-Fi. I2S codec output, Bluetooth A2DP for external speakers.
External Audio
Route bot audio to Bluetooth speakers, wired speakers, or the device speaker. Full routing control from the app.
PWA on Any Device
Installable Progressive Web App for iOS, Android, and desktop. Works offline with service worker caching.
Start Building Today
Create your first bot in minutes. Free tier available.