What do the languages Nahuatl, Bahasa Indonesia and Bulgarian have in common?

Nahuatl, Bahasa Indonesia and Bulgarian all feature in our very first community curated datasets to be uploaded to the Mozilla Data Collective platform.

FAQ: Why can’t I download old versions of Common Voice datasets?

In order to better serve our community and to keep up with current changes in best practices for data stewardship, we are changing how previous releases of the Common Voice datasets are accessed. They will now be accessible to interested researchers and others via an email-based request process. You will

We're Changing Access to Older Versions of Common Voice datasets

We’re tightening the circulation of old datasets to protect contributors, while keeping a clear, documented path for researchers who need them.

FAQ: I've noticed an issue with a data listing - what do I do?

If you discover a minor issue with the accuracy of a data listing on Mozilla Data Collective (a typo, missing attribute in datasheet, etc.) and want to bring it to the attention of the data provider, reach out to the point of contact as specified in the data listing. If

Kick-off of the Shared Task: MCV Spontaneous Speech

Join us for the official kick‑off of the Shared Task: Mozilla Common Voice Spontaneous Speech! This live, online gathering will bring together researchers, engineers, and language‑technology enthusiasts from around the world to launch the challenge focused on building robust, multilingual ASR systems for under‑represented languages. In a

FAQ: Why can't I re-host or share Common Voice datasets that I download from MDC?

Mozilla Data Collective wants to provide effective, ethical stewardship support for datasets. This is challenging or impossible when datasets are mirrored or split across a range of forks. Our principles include trying to enable good governance, e.g. the right to be forgotten, as much as possible, which means we

Shared Task: Mozilla Common Voice Spontaneous Speech ASR

Quick links * Registration Form * Link to datasets * Codabench page (to submit results during the testing period) * Contact: sharedtask@mozillafoundation.org Overview Automatic speech recognition (ASR) has come a long way – but most systems are still trained on polished, read-aloud speech. So we set out to build a model that can

Common Voice 23.0 Live On Mozilla Data Collective

Common Voice 23.0 is now live – and available for download via Mozilla Data Collective.  Mozilla Data Collective is a sister platform from the team behind Common Voice, designed to let dataset owners and creators offer their data on their own terms. Mozilla Data Collective was built in response to

Mozilla Data Collective Alpha Goes Live

Mozilla Data Collective is now in live alpha, offering the Common Voice 23.0 datasets.

Your datasets, under your control: Mozilla Data Collective at PyConAU in Melbourne, Australia

Kathy Reid's presentation to PyConAU in Melbourne, Australia covers tokenomics, harvesting tokens, and how Mozilla Data Collective offers a better way forward.

FAQ: What is the MDC Public API?

The Mozilla Data Collective REST API provides a way for developers to access datasets from their own applications, using the programming language of their choice. Users must agree to dataset terms through the web interface before downloading. Each download token can only be used for one complete download session, and

FAQ: Can I get the Common Voice or other MDC datasets from other platforms like GitHub or Hugging Face?

We have no plans to host Mozilla community datasets through third parties at this time, as it makes governance and stewardship extremely challenging. For example, when someone chooses to revoke their consent to be included in a dataset, we need a way to remove them from the dataset and update

Docs

Roadmap

We're excited to share a high-level roadmap for the Mozilla Data Collective platform, leading up to our 1.0 launch in early Q1 2026: September: Mozilla Data Collective Alpha Launch October: New Datasets Available November: Mozilla Data Collective Beta Launch * Dataset and datasheet on-boarding and upload flow * Feature

FAQ

FAQ: What is the long-term sustainability model for Mozilla Data Collective?

We are a mission-driven, community-centred tech organisation being incubated within Mozilla Foundation. Mozilla Data Collective anticipates that we will have both social enterprise and non-profit components eventually, as we think that in today’s volatile, politicised grant funding environment, it’s never been more important to be independent.  Our business

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FAQ: Who is behind Mozilla Data Collective?

We are backed and stewarded by Mozilla Foundation - the non-profit, movement-building, and philanthropy arm of Mozilla.

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FAQ: How does Mozilla Data Collective work?

We partner with organizations and individuals to make their data available through Mozilla Data Collective. You can share openly, using existing licenses like Creative Commons, or you can build your own. You can open up your data for everyone, or just for some types of downloaders, you can set custom

FAQ

FAQ: What is Mozilla Data Collective?

Mozilla Data Collective is a platform in the truest sense. It’s yours to stand on, and make of it what you will. We have dual roots in two Mozilla projects - Common Voice, a CC0 public dataset to help tech speak your language - and the Data Futures Lab

News

Exciting News! Mozilla Data Collective

Over the last eight years, the Common Voice community has shared wishlists with us for ways to create, curate, and control their data that extend beyond our current platform capabilities. For example, supporting the collection and release of datasets under different licences to CC-0, and the ability to contribute datasets