The data layer for frontier models.
Rights-cleared training data across every modality. Licensed, enriched, and sourced. Compliant by design.
Sourcing & enrichment partner to teams building at the frontier
Five ways we power frontier AI.
Off-the-shelf datasets (OTS)
70+ rights-cleared datasets. 8 modalities, 220+ languages.
Browse the catalogue →Custom data collection
Our partner network collects data to your exact spec, anywhere, at any scale.
Commission collection →Data enrichment
Raw content from any source becomes model-ready training data with 10+ JSON layers, plus customization.
See how enrichment works →Data acquisition & brokerage
We acquire, license, and distribute data between owners and buyers.
Talk to our team →Data & AI strategy
Consulting for your data strategy, monetization roadmap, sourcing requirements, and where AI fits in your business.
Start a conversation →Off-the-shelf datasets, ready to license.
Fast, enriched, cleared for training. Browse by category.
Datasets teams are licensing right now.
A live look at what frontier teams are training on this week.
Evaluation data, contamination-controlled.
The held-out eval sets labs use to gate releases. Authored by experts, rotated to prevent leakage.
Every asset ships with the intelligence models train on.
Save on compute, along with hundreds of hours of work from your producers and engineers.
A real pack from a 15 minute Arabic conversation.
More about the pack
Built for buyers who can't take rights risk.
Provenance you can defend
We stand behind every one of our assets.
Model-ready, not raw
Cleaned, annotated, formatted to your schema.
Depth + diversity
Balanced across languages, demographics, and domains.
Sample before you commit
Free sample and datasheet before you commit.
One platform, two sides of the data economy.
Browse data
Sample & evaluate
Purchase License
Start training
For demand
Frontier labs, Mag7 teams, enterprise ML.
- ✓Pretraining & fine-tuning corpora
- ✓Evaluation & RL data
- ✓Exclusive & non-exclusive licensing
Submit your catalogue details
We enrich & package
List or license
Get paid
For supply
Publishers, rights holders, creators.
- ✓Monetize archives without losing control
- ✓Enrichment included
- ✓Recurring revenue share
If it isn't in the catalogue, we'll source it.
Custom collection and enrichment to your exact specification, language, domain, modality, annotation schema, and scale.
License-ready training datasets.
Filter by modality and language, or describe what you need and let AI search match it.
Specifications
What's included with every dataset
Clean, structured, model-ready
- ✓The core modality files, audio, image, video, text, code or sensor logs
- ✓Deduplicated, quality-filtered and consistently formatted
- ✓Documented provenance, license and consent records
- ✓Datasheet covering collection method and known limitations
The labels buyers actually train on
- ✓Attached annotations as JSON & JSONL sidecars
- ✓Transcripts, diarization, boxes, masks, captions or preferences, per modality
- ✓Optional human verification for gold-standard quality
- ✓Delivered via AWS S3, GCS, Azure or your own object storage
No deal is too large or too small, from a targeted slice to a multi-terabyte corpus, and we collect and source data from all over the world.
Primary use cases
Performance documentation
Full benchmark methodology, evaluation harness, and per-slice breakdowns are included in the datasheet provided with every sample request.
Data sourced to your exact specification.
When the catalogue doesn't cover it, our collection network and enrichment pipeline build the dataset you need, any language, domain, modality, or annotation schema.
Scope
We define spec, schema, volume, quality bar, and rights model with your team.
Source
We recruit contributors or license content with documented consent and rights.
Collect
Managed collection with QA gates, redundancy, and demographic balancing.
Enrich
Transcription, labeling, preference, and validation by trained or expert annotators.
Deliver
Model-ready output in your format, with full datasheet and audit trail.
If it can be collected or labeled, we can source it.
Speech & audio
Scripted or spontaneous, any language, accent, acoustic condition, or emotion.
Video & multimodal
Egocentric, instructional, domain-specific, with the annotations you define.
Reasoning & preference
Chain-of-thought, RLHF, red-team, and expert-verified evaluation data.
Expert domains
Medical, legal, financial, scientific, annotated by credentialed specialists.
Tell us what you need.
Every dataset ships with the receipts.
We document quality the way a research team would, transparent metrics, reproducible methodology, and per-slice breakdowns so you know exactly what you're licensing.
Benchmark suite
Standardized metrics per modality, WER, alignment accuracy, label agreement, and more.
Reproducible methodology
Published evaluation harness and protocol so you can verify our numbers yourself.
Per-slice transparency
Breakdowns by language, demographic, domain, and difficulty, not just headline figures.
Datasheet for every set
Composition, collection, consent, intended use, and known limitations, every record.
How we hit these numbers. Our enrichment runs a council of every leading model, best-available ASR, vision, and language models ensembled per language and modality, then reconciled against one another. Where accuracy matters most, human verification corrects the ensemble to a gold standard. The result: machine labels at the frontier of what's possible, and human-verified labels beyond it.
Recognition accuracy by language tier.
Word Error Rate (WER) and Character Error Rate (CER) from our model council, with human-verified gold available across every tier. Lower is better.
| Tier | Example languages | Council WER | Council CER | Human-verified |
|---|---|---|---|---|
| Tier A · High-resource 45+ languages |
English, Spanish, Mandarin, French, German, Japanese, Portuguese, Italian, Hindi, Arabic (MSA) | 2–5% | 1–3% | <1% |
| Tier B · Mid-resource 90+ languages |
Vietnamese, Polish, Turkish, Ukrainian, Tamil, Thai, Greek, Hungarian, Hebrew, Malay | 5–10% | 2–5% | <1.5% |
| Tier C · Low-resource 85+ languages |
Swahili, Amharic, Khmer, Lao, Sinhala, Zulu, Yoruba, Uyghur, Quechua + endangered languages | 9–18% | 4–9% | <2% |
220+ languages covered in total. Tier C model figures reflect genuinely low-resource conditions, and it's exactly where our human-verified gold transcripts earn their keep, closing the gap to under 2% WER.
What our performance docs look like.
Representative figures across our catalogue. Each dataset ships with its own measured numbers, full methodology, and per-slice breakdowns in the datasheet.
Want the full datasheet for a dataset?
Request a sample and we'll include complete performance documentation and methodology.
We turn the world's content into the data models learn from.
ModelCore sits between the people who own valuable content and the teams building frontier AI, sourcing, enriching, and licensing training data that's compliant by design and ready to train on.
Data and compute are the bottleneck.
Model performance is gated by two scarce inputs: compute and data. The frontier labs have poured extraordinary resources into compute, but the supply of high-quality, rights-cleared, richly-labeled training data has not kept pace. Increasingly, data is the binding constraint on how good models can get.
That constraint isn't only technical. The capabilities that matter to society, assistants that work in every language, models that reason reliably, systems that are safe and fair, all depend on data that is diverse, well-sourced, and faithfully annotated. When the data is thin, biased, or legally fraught, progress slows and risk goes up.
ModelCore exists to relieve that bottleneck responsibly. We unlock the world's underused content, enrich it into model-ready data with a council of leading models and human verification, and license it under terms creators and labs can both stand behind. Better data, sourced fairly, is how the next generation of models, and the advances they bring, actually get built.
What we stand for
Compliance first
We don't ship data we can't stand behind. Consent and rights are the foundation, not an afterthought.
Fair to creators
The people who make content share in the value it creates downstream. Transparent revenue, always.
Research-grade rigor
We measure and document quality like a lab, because the teams we serve depend on it.
Build with data you can trust.
Whether you're buying, supplying, or commissioning, let's talk.
Questions, answered.
Let's talk data.
Tell us whether you're looking to license, supply, or commission, and we'll route you to the right person. Prefer to talk live? Schedule a call →
Five pillars, one data partner.
The full data lifecycle, one partner.
Off-the-shelf datasets (OTS)
Rights-cleared datasets, ready to license in your format.
- ✓70+ datasets, with a free sample and datasheet before you commit
- ✓Delivered as JSONL, WebDataset or Parquet via S3 / cloud storage
- ✓Signed license and full audit trail on every set
Custom data collection
Our partner network collects data to your exact spec, cleared for use.
- ✓Partner network across languages, regions & demographics
- ✓Audio, image, video, text, code & sensor capture to your schema
- ✓Consent & rights tooling built in, delivered via S3 / cloud
Data enrichment
Raw content becomes model-ready training data, with the labels buyers train on.
- ✓Transcription, diarization, captioning, boxes, masks & preferences
- ✓Optional human verification and synthetic-content detection
- ✓Attached as JSON / JSONL sidecars on every record
Data acquisition & brokerage
We acquire, license, and distribute data between owners and buyers.
- ✓Acquire, license, and relicense across every modality
- ✓Exclusive & non-exclusive deals, any size
- ✓Rights, consent & audit trail on every transaction
Data & AI strategy
Data strategy, sourcing and evaluation, and where AI fits.
- ✓Data strategy & sourcing roadmaps
- ✓Evaluation & benchmark design
- ✓AI opportunity assessments for your operations
Tell us the problem. We will point you to the right pillar.
From a single dataset to a full data and AI strategy, we will route you to the right team.
Help build the data layer for frontier AI.
We're a small, fast team working at the bottleneck of model progress: data and compute. If you want your work to show up in the next generation of models, we'd love to talk.
Back-End Engineer
Build the pipelines, APIs, and storage that move petabytes of training data from collection to delivery, reliably, securely, and fast.
Forward-Deployed Engineer (FDE)
Work directly with frontier labs and enterprise teams to scope, ship, and integrate custom data solutions into their training stacks.
Business Development Representative (BDR)
Open conversations with the teams building the world's models, qualify needs, run discovery, and grow the top of our pipeline.
Data Operations Lead
Run global collection and annotation programs end-to-end, vendors, quality, throughput, and the human-verification workflows behind gold data.
Don't see your role? Tell us what you'd build, hello@modelcore.io.