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What is Piper TTS?

Piper is a high-speed, localized neural text-to-speech (TTS) system specifically designed for devices such as the Raspberry Pi 4, with the goal of delivering exceptional speech synthesis capabilities independent of cloud services. By utilizing neural network models created with VITS and later converted to ONNX Runtime, it ensures both efficient and lifelike speech generation. The system supports a wide range of languages including English (US and UK variations), Spanish (from Spain and Mexico), French, German, and several others, along with options for downloadable voices. Users can interact with Piper through command-line interfaces or easily incorporate it into Python applications using the piper-tts package, allowing for versatile usage. Features like real-time audio streaming, the ability to process JSON inputs for batch tasks, and support for multi-speaker models further enhance its functionality. In addition, Piper leverages espeak-ng for phoneme generation, converting text into phonemes prior to speech synthesis. Its versatility is evident in its applications across multiple projects such as Home Assistant, Rhasspy 3, and NVDA, showcasing its adaptability to various platforms and scenarios. By prioritizing local processing, Piper is particularly appealing to users who value privacy and efficiency in their speech synthesis applications. Its capability to operate seamlessly across different environments makes it a powerful tool for developers and users alike.

What is Outtloud?

Outtloud is an advanced AI-driven text-to-speech platform designed to revolutionize how users consume written content by transforming documents, academic papers, news, and web articles into immersive, natural-sounding audio. With over 100 premium human-like voices available in more than 50 languages, users can customize their listening experience with emotional tones such as whispering, excitement, sadness, and cheerfulness, enhancing engagement and comprehension. The platform supports multiple file formats like PDFs and EPUBs, and it’s capable of accurately pronouncing complex STEM and scientific terminology, making it perfect for researchers and students. Outtloud also offers innovative features like AI-generated podcasts created from real-time web searches, turning curated information into personalized audio summaries on any topic. Users can bookmark, annotate, and save specific paragraphs for later review, and skip non-essential content such as page numbers and footnotes to streamline their listening sessions. Security and privacy are prioritized with encrypted data storage and strict confidentiality policies. Outtloud’s intuitive interface and productivity-enhancing tools allow busy professionals to learn on the move—whether commuting, exercising, or multitasking. Pricing plans start at just $8 per month with a risk-free 3-day trial, providing affordable access to a powerful auditory learning experience. The platform is widely praised by users for its natural voice quality, unlimited listening capabilities, and time-saving features. Overall, Outtloud combines state-of-the-art AI technology with user-centric design to deliver a uniquely efficient and enjoyable way to absorb information through audio.

Media

Media

No images available

Integrations Supported

JSON
Python

Integrations Supported

JSON
Python

API Availability

Has API

API Availability

Has API

Pricing Information

Free
Free Trial Offered?
Free Version

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Rhasspy

Company Location

United States

Company Website

github.com/rhasspy/piper

Company Facts

Organization Name

Outtloud

Date Founded

2025

Company Location

United States

Company Website

www.outtloud.com

Categories and Features

Text to Speech

API
Adjust Speaking Rate / Pitch
Audio Optimization
Custom Lexicons
Different Voice Choices
Multi-Language Support
Synchronize Speech

Categories and Features

Text to Speech

API
Adjust Speaking Rate / Pitch
Audio Optimization
Custom Lexicons
Different Voice Choices
Multi-Language Support
Synchronize Speech

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