8 Best ChatTTS Alternatives in 2026 (Open Source)
ChatTTS — A generative speech model for daily dialogue.. Purpose-built for dialogue TTS with fine-grained control over prosody (laughter, pauses, interjections) that most TTS models lack — trained on 100K+ hours, with multi-speaker and streaming support, but deliberately limited for safety
These 8 open-source tools do the same job. They are ordered by how closely they match ChatTTS, with live GitHub data so you can see which projects are actively maintained.
| Tool | GitHub stars | Stars / 30d | Last commit |
|---|---|---|---|
| ChatTTS(original) | 39.9k | +142 | 2026-04-10 |
| EmotiVoice | 8.5k | +12 | 2026-09-03 |
| IndexTTS-2.5 | 24.2k | +740 | 2026-09-29 |
| TTS-WebUI | 3.3k | +39 | 2026-09-07 |
| AudioGPT | 10.2k | +-7 | 2023-05-05 |
| RealChar | 6.2k | +1 | 2024-02-03 |
| agents | 14.4k | +1,370 | 2026-09-30 |
| Pipecat | 16.1k | +833 | 2026-09-30 |
| Open Notebook | 39.7k | +2,916 | 2026-09-12 |
1. EmotiVoice
EmotiVoice 😊: a Multi-Voice and Prompt-Controlled TTS Engine
What sets it apart: vs standard TTS engines: prompt-controlled emotional synthesis across 2000+ voices — the ability to specify emotion (happy, sad, angry) alongside text sets it apart from monotone alternatives
Best for: Multilingual content creation requiring emotional nuance; Voice cloning applications with custom datasets; Applications needing diverse voice options with emotional variation
2. IndexTTS-2.5
An Industrial-Level Controllable and Efficient Zero-Shot Text-To-Speech System
What sets it apart: vs F5-TTS/CosyVoice: First autoregressive TTS model with precise duration control for video dubbing, plus emotion-timbre disentanglement allowing independent control of voice identity and emotional expression - developed by Bilibili
Best for: High-quality zero-shot TTS with emotion control; Video dubbing with precise duration matching; Research on expressive speech synthesis
3. TTS-WebUI
A single Gradio + React WebUI with extensions for ACE-Step, Kimi Audio, Piper TTS, GPT-SoVITS, CosyVoice, XTTSv2, DIA, Kokoro, OpenVoice, ParlerTTS, Stable Audio, MMS, StyleTTS2, MAGNet, AudioGen, Mus
What sets it apart: vs individual TTS tools: Single unified interface supporting 25+ TTS/audio models with extension system, eliminating the need to set up separate environments for each model
Best for: Experimenting with and comparing multiple TTS models in one interface; Audio content creation workflows (voice, music, effects)
4. AudioGPT
AudioGPT: Understanding and Generating Speech, Music, Sound, and Talking Head
What sets it apart: vs ElevenLabs / Bark / MusicGen: unified agent orchestrating 15+ specialized audio foundation models across speech, music, sound, and video — one interface for the entire audio AI landscape
Best for: Multi-modal audio research spanning speech, music, and sound; Prototyping audio AI pipelines with diverse foundation models; Accessibility applications combining speech and visual generation
5. RealChar
🎙️🤖Create, Customize and Talk to your AI Character/Companion in Realtime (All in One Codebase!). Have a natural seamless conversation with AI everywhere (mobile, web and terminal) using LLM OpenAI G
What sets it apart: vs Character.AI: fully open-source with voice cloning, multi-platform (web+iOS+phone), and pluggable LLM/TTS backends — own your AI characters
Best for: Building interactive AI character experiences with voice; Developers creating multi-platform conversational AI personas
6. agents
A framework for building realtime voice AI agents 🤖🎙️📹
What sets it apart: The leading open-source framework for realtime voice AI agents with WebRTC infrastructure, semantic turn detection, multi-agent handoff, and native telephony — vs alternatives that bolt voice onto text-first frameworks
Best for: Building production voice AI agents and assistants; Real-time conversational AI with telephony integration; Multi-agent voice workflows with handoffs
7. Pipecat
Open Source framework for voice and multimodal conversational AI
What sets it apart: Only production-grade framework for real-time voice AI with composable pipelines — supports 17+ STT and 20+ TTS providers with ultra-low latency, unlike text-focused agent frameworks
Best for: Building real-time voice AI agents and assistants; Multimodal conversational interfaces with audio, video, and text
8. Open Notebook
An Open Source implementation of Notebook LM with more flexibility and features
What sets it apart: Self-hosted NotebookLM alternative with 16+ provider support and 4-speaker podcast generation — vs Google NotebookLM which is cloud-only with 2 speakers
Best for: Privacy-conscious researchers who want NotebookLM-like features; Users who want multi-provider AI with local model support