{
  "_type": "curated_open_data",
  "as_of": "2026-07",
  "links": {
    "canonical": "https://verticalmarketplace.ai",
    "docs_for_llms": "https://verticalmarketplace.ai/llms.txt",
    "sell_your_own": "https://verticalmarketplace.ai/api/marketplace/listings",
    "vertical_listings": "https://verticalmarketplace.ai/api/marketplace/listings?vertical=training-data"
  },
  "records": [
    {
      "url": "https://huggingface.co",
      "name": "Hugging Face",
      "role": "Hosts open models and datasets",
      "jurisdiction": "USA"
    },
    {
      "url": "https://www.kaggle.com",
      "name": "Kaggle",
      "role": "Datasets, notebooks and competitions",
      "jurisdiction": "USA"
    },
    {
      "url": "https://archive.ics.uci.edu",
      "name": "UCI Machine Learning Repository",
      "role": "Classic curated ML datasets",
      "jurisdiction": "USA"
    },
    {
      "url": "https://paperswithcode.com",
      "name": "Papers with Code",
      "role": "Benchmarks and state-of-the-art leaderboards",
      "jurisdiction": "International"
    },
    {
      "url": "https://datasetsearch.research.google.com",
      "name": "Google Dataset Search",
      "role": "Search engine for public datasets",
      "jurisdiction": "USA"
    },
    {
      "url": "https://www.openml.org",
      "name": "OpenML",
      "role": "Open datasets, tasks and experiment tracking",
      "jurisdiction": "International"
    },
    {
      "url": "https://commoncrawl.org",
      "name": "Common Crawl",
      "role": "Open web-crawl corpus",
      "jurisdiction": "USA"
    },
    {
      "url": "https://laion.ai",
      "name": "LAION",
      "role": "Open image-text datasets",
      "jurisdiction": "Germany"
    },
    {
      "url": "https://nlp.stanford.edu",
      "name": "Stanford NLP Group",
      "role": "Maintains SQuAD, GloVe and NLP corpora",
      "jurisdiction": "USA"
    },
    {
      "url": "https://wordnet.princeton.edu",
      "name": "Princeton WordNet",
      "role": "English lexical database",
      "jurisdiction": "USA"
    },
    {
      "url": "https://www.ldc.upenn.edu",
      "name": "Linguistic Data Consortium (LDC)",
      "role": "Language corpora and lexicons",
      "jurisdiction": "USA"
    },
    {
      "url": "https://mlcommons.org",
      "name": "MLCommons",
      "role": "Maintains MLPerf benchmarks",
      "jurisdiction": "International"
    },
    {
      "url": "https://www.tensorflow.org/datasets",
      "name": "TensorFlow Datasets",
      "role": "Ready-to-use dataset collection",
      "jurisdiction": "USA"
    }
  ],
  "sources": [
    {
      "url": "https://archive.ics.uci.edu",
      "name": "UCI Machine Learning Repository"
    },
    {
      "url": "https://paperswithcode.com",
      "name": "Papers with Code"
    },
    {
      "url": "https://mlcommons.org",
      "name": "MLCommons"
    }
  ],
  "category": "directory",
  "vertical": "training-data",
  "data_note": "All records are public-domain facts compiled from the cited sources as of the asOf date. This content is authored and served by the platform itself — it is not seller data, so the marketplace's zero-storage promise about seller datasets is unaffected.",
  "record_count": 13,
  "what_this_is": "A platform-published open-data listing curated by Open Data Desk, the marketplace's in-house public-data seller. It is real free inventory: it counts in marketplace statistics and is purchasable for $0 through the normal purchase flow, which delivers this payload with an Ed25519-signed receipt.",
  "record_schema": {
    "url": "Official website",
    "name": "Hub, provider or maintainer name",
    "role": "What it offers to ML practitioners",
    "jurisdiction": "Geographic or organizational scope"
  },
  "buyer_use_cases": [
    "Discover reputable sources for labeled training and evaluation data",
    "Choose a hub for publishing or hosting an open dataset",
    "Reference standard benchmark maintainers when reporting results"
  ]
}