Customers increasingly expect to connect with services using both speech and text. A smooth text-to-speech solution that can effortlessly update your customers through speech synthesis can improve user engagement and increase your market share. However, without natural pronunciation, phrasing, and intonation, your model won’t have the transformative impact you’re hoping for.

Luckily, it’s never been easier to source the training data you need to build a model that’s capable of conversing with your customers. Our global community works in over 300 languages and dialects to improve your data at every stage of the training process, from collecting native audio samples to validating your model’s output. Whatever your use case, we have the crowd, tools, and experience to help you develop an algorithm that speaks like a human.

Our Text-to-Speech Services

Audio Data Collection

The best text-to-speech algorithms are able to produce natural speech in the user’s preferred language. To do this, they need to be trained on a range of data collected from native speakers of that language. Our global crowd contains language specialists in over 300 languages and dialects that you can use to build out your model’s language capabilities. Discover more about our audio collection process below.


Audio Evaluation

Expert analysis of your model’s output can be the key to natural speech that sets you above your competitors. By editing your audio, our computational linguists can help you to pinpoint the exact moment your model begins to sound robotic and make actionable suggestions for improvement. Book a free consultation with us to explore how our detailed analysis can help you to create a native-like text-to-speech model.


Data Entry

From text to words to phonemes, your model needs to be able to move text through several iterations before it can accurately verbalize it. Each step requires an extremely high level of accuracy if you want to produce intelligible speech. Our community of language specialists can help you to navigate this process with ease by editing and cleansing training data in any of our 300 supported languages and dialects.


How it Works

how to crowdsource data

1. Project set-up

Our team will work with you to develop a custom solution based on your project objectives and timeline.

how to crowdsource data
how to crowdsource data

2. Production

Our crowd of multilingual experts get to work creating, annotating or validating your data.

how to crowdsource data
how to crowdsource data

3. Delivery

Our project management team check, package and format the data before sending it to you for final approval.

how to crowdsource data

Why Lionbridge?


Bring 20 years of experience in data annotation and a global network of language experts to your project.


We test both our annotations and our community to ensure that every data point makes your model better.

Multilingual Services

Our community works in every major language and global market to improve your model’s output.

1 million+ Contributors
300+ Languages
20+ Years of Experience

Case Studies

Virtual Assistant Development for a Leading Technology Company

We trained and tested one of the world’s leading virtual assistants in over a dozen new languages to help our client increase their global market share. This involved developing their voice grammar XML, creating pronunciation tasks for speech recognition, and generating thousands of monthly sentence variations. With our help, they were able to build a virtual assistant that can naturally respond to user queries in 14 languages.


Text-to-Speech Data Pricing

The Lionbridge platform streamlines much of the data collection process, allowing us to offer one of the most cost-effective solutions in the industry. Our project management team will work with you to understand your project objectives, budget, and timeline to customize a program to meet your requirements.

  • Account Manager
  • Project Management
  • 24/7 Support
  • API
  • NDA
  • Volume pricing
  • Custom reporting
  • Enterprise-grade SLAs
  • Custom invoicing
  • Consulting services
Get in touch with our team today

Multilingual Services for Text-to-Speech Solutions

Lionbridge provides text-to-speech data in over 300 languages. Some of our most popular languages include:

  • Chinese text-to-speech services
  • Dutch text-to-speech services
  • French text-to-speech services
  • German text-to-speech services
  • Italian text-to-speech services
  • Japanese text-to-speech services
  • Portuguese text-to-speech services
  • Spanish text-to-speech services

Develop a seamless flow between text and audio

Communicate with a wider audience using Lionbridge’s audio transcription services.
Produce natural, error-free translations with Lionbridge’s machine translation quality evaluation services.
Train your virtual assistant to respond to human speech in a variety of languages, environments, and contexts.