Language data collection and curation

What we offer

We design and run language data programmes for African languages, from a single targeted dataset to multi-language collection at scale. Every project is built with native speakers and checked by experts, so you receive data you can rely on for training, evaluation and product launches.

• Speech data: read and spontaneous speech across accents, dialects and regions.

• Text data: parallel translations, monolingual corpora and domain-specific content.

• Transcription and annotation of your existing audio and text.

• Image description data, spoken or written in the target language.

• Validation and quality review of datasets you already hold.

How it works

• Scope: we agree the languages, domains, volumes and quality targets with you.

• Collect: native and fluent speakers contribute through All Voices, our platform for translation, transcription, speech recording and image description, with automatic audio quality checks.

• Validate: contributions go through peer review and expert checks before they are accepted.

• Deliver: you receive a reviewed dataset, exportable as JSON or CSV.

Why partners choose us

• More than a decade of collection and validation work across the continent.

• 100B+ curated tokens and 13,000+ hours of expert-validated speech already gathered.

• Work across 70+ languages, with deep relationships in the communities that speak them.

• Partner tools for project setup, role-based team access and progress tracking.

Who it is for

AI labs and product teams adding African languages, researchers who need trusted benchmarks, and organisations in health, finance, education and media that need data in the languages their users speak.

Let's talk

Tell us which languages and use cases you are working on, and we will propose a collection plan, timeline and quality approach that fits.