Voice & Speech

EmotiVoice

Multi-Voice and Prompt-Controlled TTS Engine

Status
Generally available
Last checked
Checked · Oct 16, 2026
License
Open source
Pricing
Free tier · from $0
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What it is

EmotiVoice is a versatile text-to-speech engine that supports multiple voices and prompt-controlled synthesis, making it ideal for applications requiring varied vocal expressions.

EmotiVoice stands out with its support for multiple voices and prompt-controlled synthesis, offering developers greater flexibility in creating diverse vocal expressions compared to other open-source text-to-speech engines.

When it fits — and when it doesn’t

A good fit for

  • Teams developing voice-based applications requiring varied vocal expressions and nuanced speech synthesis

  • Projects needing open-source solutions for text-to-speech capabilities without licensing concerns

Look elsewhere if

  • Applications that require real-time streaming of TTS output (batch-only architecture)

  • Budget-constrained projects where the cost of self-hosting is a concern

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

  1. 01

    Limited voice customization options beyond prompts

    Documentation lacks detailed information on advanced voice parameter tuning

  2. 02

    Performance degradation with complex prompt-controlled synthesis

    Benchmark tests show increased latency when using intricate prompt configurations

What it does well

  • Supports multiple voices for varied vocal expressions

  • Prompt-controlled synthesis for nuanced speech generation

  • Open-source under Apache-2.0 license

Pricing

Free tier
YesOpen source — free to use
Paid from
$0
Model
Flat rate
Enterprise plan
No

Pricing not independently confirmed — check the vendor’s page.

Performance benchmarks

How Fast Is It?

Set up EmotiVoice

Setup steps, common gotchas and what to check after 30 days.

Open the setup guide →
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