An Introduction to Machine Learning Datasets and Resources

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Robert Koch

I write about AI, SEO, Tech, and Innovation. Led by curiosity, I stay ahead of AI advancements. I aim for clarity and understand the necessity of change, taking guidance from Shaw: 'Progress is impossible without change,' and living by Welch's words: 'Change before you have to'.

Machine Learning Datasets

Machine learning is one of the hottest topics in tech. The concept has been around for decades, but the conversation is heating up now thanks to its use in everything from internet searches and email spam filters to recommendation engines and self-driving cars. Machine learning training is a process by which one trains machine intelligence with data sets. To do this effectively, it is important to have a large variety of high-quality datasets at your disposal. Fortunately, there are many sources for datasets for machine learning, including public databases and proprietary datasets.

Table of Contents

What are Machine Learning Datasets?

Machine learning datasets are important for machine learning algorithms to learn from. A dataset is an example of how machine learning helps make predictions, with labels that represent the outcome of a given prediction (success or failure). The best way to get started with machine learning is by using libraries like Scikit-learn or Tensorflow which allow you to perform most tasks without writing code.

There are three main types of machine learning methods: supervised (learning from examples), unsupervised (learning through clustering) and reinforcement learning (rewards). Supervised learning is the practice of teaching a computer how to recognize patterns in data. Techniques that use supervised learning algorithms include: random forest, nearest neighbors, weak law of large numbers, ray tracing algorithm and SVM algorithm.

Machine learning datasets come in many different forms and can be sourced from a variety of places. Textual data, image data, and sensor data are the three most common types of machine learning datasets. A dataset is simply a set of information that can be used to make predictions about future events or outcomes based on historical data. Datasets are typically labelled before they are used by machine learning algorithms so the algorithm knows what outcome it should predict or classify as an anomaly. For example, if you were trying to predict whether or not a customer would churn, you might label your dataset “churned” and “not churned” so the machine learning algorithm can learn from past data. Machine learning datasets can be created from any data source- even if that data is unstructured. For example, you could take all of the tweets mentioning your company and use that as a machine learning dataset.

To learn more about machine learning and its origins, read our blog post on the History of Machine Learning.

What are the types of datasets?

Machine Learning Dataset splitted into Training-, Validation, and Testing Dataset
A dataset can be split into 3 parts: Training, Validation and Testing

A machine learning dataset is a set of data that has been organized into training, validation and test sets. Machine learning typically uses these datasets to teach algorithms how to recognize patterns in the data.

  • The training set is the data that helps teach the algorithm what to look for and how to recognize it when they see it in other data sets.
  • A validation set is a collection of known-good data that the algorithm can be tested against.
  • The test set is the final collection of unknown-good data from which you can measure performance and adjust accordingly.

Why do you need datasets for your AI model?

Machine learning datasets are important for two reasons: they allow you to train your machine learning models, and they provide a benchmark for measuring the accuracy of your models. Datasets come in a variety of shapes and sizes, so it’s important to choose one that is appropriate for the task at hand.

Machine learning models are only as good as the data they’re trained on. The more data you have, the better your model will be. This is why it’s important to have a large volume of processed datasets when working on AI projects – so that you can train your model effectively and achieve the best results.

Use Cases for machine learning datasets

There are many different types of machine learning datasets. Some of the most common ones include text data, audio data, video data and image data. Each type of data has its own unique set of use cases.

  • Text data is a great choice for applications that need to understand natural language. Examples include chatbots and sentiment analysis.
  • Audio datasets are used for a wide range of purposes, including bioacoustics and sound modeling. They can also be useful in computer vision, speech recognition or music information retrieval.
  • Video datasets are used to create advanced digital video production software, such as motion tracking, facial recognition and 3D rendering. They can also be created for the purposes of collecting data in real time.
  • Image datasets are used for a variety of different purposes such as image compression and recognition, speech synthesis, natural language processing and more.

What makes a good dataset?

A good machine learning dataset has a few key characteristics: it’s large enough to be representative, of high quality, and relevant to the task at hand.

Features of a good machine learning dataset
Features of a good data set for machine learning

Quantity is important because you need enough data to train your algorithm properly. Quality is essential for avoiding problems with bias and blind spots in the data. If you don’t have enough high-quality data, you run the risk of overfitting your model–that is, training it so well on the available data that it performs poorly when applied to new examples. In such cases, it’s always a good idea to get advice from a data scientist. Relevance and coverage are key factors to consider when collecting data. Use live data if possible to avoid problems with bias and blind spots in the data.

To summarize: A good machine learning dataset contains variables and features that are appropriately structured, has minimal noise (no irrelevant information), is scalable to large numbers of data points, and can be easy to work with.

Where can I get machine learning datasets?

When it comes to data, there are many different sources that you can use for your machine learning dataset. The most common sources of data are the internet and ai-generated data. However, other sources include datasets from public and private organizations or individual enthusiasts who collect and share data online.

One important thing to note is that the format of the data will affect how easy or difficult it is to use the data set. Different file formats can be used to collect data, but not all formats are suitable for machine learning models. For example, text files are easy to read but they do not have any information about the variables being collected. On the other hand, csv files (comma-separated values) have both the text and numerical information in one place which makes it convenient for machine learning models.

It’s also important to make sure that the formatting consistency of your dataset is maintained when people update it manually by different persons. This prevents any discrepancies from happening when using a dataset which has been updated over time. In order for your machine learning model to be accurate, you need high-quality consistent input data!

Top 20 Free Machine Learning Datasets Resources

Top 20 Free ML Datasets
Top 20 Free ML Data Sets

When it comes to machine learning, data is key. Without data, there can be no training of models and no insights gained. Thankfully, there are a lot of sources from which you can obtain free datasets for machine learning.

The more data you have when training, the better, but data by itself isn’t enough. It’s just as important to make sure that the datasets are relevant to the task at hand and of high quality. To start, you need to make sure that the datasets aren’t bloated. You’ll likely want to spend some time cleaning up the data if it has too many rows or columns for what needs to be done for the project.

To save you the trouble of sifting through all the options, we have compiled a list of the top 20 free datasets for machine learning.

Open Datasets

Datasets on the Open Datasets platform are ready to be used with many popular machine learning frameworks. The datasets are well organized and regularly updated, making them a valuable resource for anyone looking for quality data.

Kaggle Datasets

If you’re looking for high-quality datasets to train your models with, then there’s no better place than Kaggle. With over 1TB of data available and constantly updated by an engaged community who contribute new code or input files that help shape the platform as well-you’ll be hard-pressed not to find what you need here!

UCI Machine Learning Repository

The UCI Machine Learning Repository is a well-known dataset source that contains a variety of datasets popular in the machine learning community. The datasets produced by this project are of high quality and can be used for various tasks. The user-contributed nature means that not every dataset is 100% clean, but most have been carefully curated to meet specific needs without any major issues present.

AWS Public Datasets

If you’re looking for big data sets that are ready to be used with AWS services, then look no further than the AWS Public Datasets repository. Datasets here are organized around specific use cases and come pre-loaded with tools that integrate with the AWS platform. One key perk that differentiates AWS Open Data Registry is its user feedback feature, which allows users to add and modify datasets.

Google Dataset Search

Google’s Dataset Search is a relatively new tool that makes it easy to find datasets regardless of their source. Datasets are indexed based on a variety of metadata, making it easy to find what you need. While the selection isn’t as robust as some of the other options on this list, it’s growing every day.

open source data sets
Find open source data sets

Public Government Datasets / Government Data Portals

The power of big data analytics is being realized in the government world also. With access to demographic records, governments can make decisions that are more appropriate for their citizens’ needs and predictions based on these models can help policymakers shape better policies before issues arise. is the US government’s open data site, which provides access to various industries like healthcare and education, among others through different filters including budgeting information as well performance scores of schools across America.

The dataset provides access to over 250,000 different datasets compiled by the US government. The site includes data from federal, state, and local governments as well as non-governmental organizations. Datasets cover a wide range of topics such as climate, education, energy, finance, health, safety, and more.

EU Open Data Portal

The European Union’s Open Data Portal is a one-stop-shop for all of your data needs. It offers datasets published by many different institutions within Europe and across 36 different countries. With an easy-to-use interface that allows you to search specific categories, this site has everything any researcher could hope to find when looking into public domain information.

Finance & Economics Datasets

The financial sector has embraced Machine Learning with open arms, and it’s no surprise why. As compared to other industries where data can be harder to find, finance & economics offer a treasure trove of information that’s perfect for AI models that want to predict future outcomes based on past performance results.

Datasets in this category can help you predict things like stock prices, economic indicators, and exchange rates.


Quandl provides access to financial, economic, and alternative datasets. The data comes in two different formats:

● time-series (date/time stamp) and

● tables – numerical/sorted types including strings for those who need it

You can download either a JSON or CSV file depending on your preference. This is a great resource for financial and economic data including everything from stock prices to commodities.

World Bank

The World Bank is an invaluable resource for anyone who wants to make sense of global trends, and this data bank has everything from population demographics all the way down to key indicators that are relevant in development work. It’s open without registration so you can access it at your convenience.

World Bank open data is the perfect source for performing large-scale analysis. The information it contains includes population demographics, macroeconomic data, and key indicators of development to help you understand how countries around the world are doing on various fronts!

Image Datasets / Computer Vision Datasets

A picture is worth a thousand words, and this is especially true in the field of computer vision. With the rise in popularity of autonomous vehicles, face recognition software is becoming more widely used for security purposes. The medical imaging technology industry also relies on databases that contain photos and videos to diagnose patient conditions correctly.

Free Image Data Sets
Image Datasets can be used for Facial Recognition


The ImageNet dataset contains millions of color images that are perfect for training image classification models. While this dataset is more commonly used for academic research, it can also be used to train machine learning models for commercial purposes.

CIFAR-10 and CIFAR-100

The CIFAR datasets are small image datasets that are commonly used for computer vision research. The CIFAR-10 dataset contains 10 classes of images, while the CIFAR-100 dataset contains 100 classes of images. These datasets are perfect for training and testing image classification models.

Coco Dataset

The Coco Dataset is a large-scale object detection, segmentation, and captioning dataset. This dataset is perfect for training and testing machine learning models for object detection and segmentation.

Natural Language Processing Datasets

The current state of the art in machine learning has been applied to a wide variety of fields including voice and speech recognition, language translation, as well as text analytics. Datasets for natural language processing are usually large in size and require a lot of computing power to train machine learning models.

The Big ad NLP Database

The 841 datasets are an excellent resource for NLP-related tasks, including document classification and automated image captioning. The collection includes many different types of data that you can use to train your machine translation or language modeler algorithms.

Yelp Reviews

Yelp is a great way to find businesses in your area. The app lets you read reviews from other people who have already tried it, so there’s no need for research. The Yelp reviews dataset is a gold mine for any company looking to do market research with 8.6 million reviews and hundreds of thousands of curated images.

Amazon Review Data (2018)

This dataset includes all the reviews for products on Amazon. It contains more than 2 billion pieces of data, including product descriptions and prices as well! This research was conducted to analyze how people engage with these online communities before making purchases or sharing their opinions about a particular product.

Audio Speech and Music Datasets

If you’re looking to analyze audio data, these datasets are perfect for you.

Free Audio Data Sets
Audio Datasets can be used for Speech Recognition

Common Voice

This open source dataset of voices for training speech-enabled technologies was created by volunteers who recorded sample sentences and reviewed recordings of other users.

Free Music Archive (FMA)

The Free Music Archive (FMA) is an open dataset for music analysis that contains full-length and HQ audio, precomputed features like spectrogram visualization, or hidden text mining with machine learning algorithms. Included is track metadata such as artists’ names & albums – all organized into genres at different levels within this hierarchy.

Datasets for Autonomous Vehicles

The data requirements for autonomous vehicles are immense. To interpret their surroundings and react accordingly, these cars need high-quality datasets, which can be hard to come by. Fortunately, there are some organizations that collect information about traffic patterns, driving behavior, and other important data sets for autonomous vehicles.

Waymo Open Dataset

This project provides a set of tools to help collect and share data for autonomous vehicles. The dataset includes information about traffic signs, lane markings, and objects in the environment. Lidar and high-resolution cameras were used to capture 1000 driving scenarios in urban environments around the country. The collection includes 12 million 3D labels as well as 1.2 million 2d labelings for vehicles, pedestrians, cyclists and signs.

Comma AI Dataset

This dataset consists of over 100 hours of driving data collected by Comma AI in San Francisco and the Bay Area. The data was collected with a device, which uses a single camera and GPS to provide live feedback about driving behavior. The data includes information about traffic, road conditions, and driver behavior.

Baidu ApolloScape Dataset

The BaiduApolloScape Dataset is a large-scale dataset for autonomous driving, which includes over 100 hours of driving data collected in various weather conditions. The data includes information about traffic, road conditions, and driver behavior.

These are just 20 of the top free datasets for machine learning available today. With so many options to choose from, there’s sure to be one that’s perfect for your needs. So, get started on your next project and take advantage of all the free data that’s out there!

Customized Machine Learning Datasets

Machine learning can be very challenging, and for many companies it’s still too early to decide how much money the business should spend on machine learning technology. But just because you’re not ready doesn’t mean someone else isn’t! And that person is probably willing to spend thousands of dollars or more for an ML dataset that works specifically with their company’s algorithm. Let us discuss why data sets are important in any machine-learning project and what factors you should consider when buying one.

  • An important benefit of customized datasets for machine learning is that the data can be segmented into specific groups, which allows you to customize your algorithms. When creating a custom dataset, it is important to ensure that your algorithm is not overfitting the data, which means it can adapt and make predictions for new data.
  • Machine Learning is a powerful tool that can be used to improve the performance of business processes. However, it can be difficult to get started without the right data. That’s where customized machine learning data sets come in. These datasets are specifically tailored to your needs, so you can start using Machine Learning right away.
  • The data is customizable and can be requested. You no longer have to settle for pre-packaged datasets that don’t meet your exact requirements. It’s now possible to request additional data or customized columns. You can also specify the format of the data, so it’s easy to work with in your preferred software platform.

Things to consider before you buy a dataset

When it comes to machine learning, data is key. The more data you have, the better your models will perform. However, not all data is created equal. Before you buy a dataset for your machine learning project, there are several things you need to consider:

Tips before buying a Dataset
Plan your project carefully before buying a dataset
  • Purpose of the data: Not all datasets are created equal. Some datasets are designed for research purposes, while others are meant for production applications. Make sure the dataset you buy is appropriate for your needs.
  • Type and quality of the data: Not all data is of equal quality either. Make sure the dataset contains high-quality information that will be relevant to your project.
  • Relevance to your project: Datasets can be extremely large and complex, so make sure the data is relevant to your specific project. If you’re working on a facial recognition system, for example, don’t buy a dataset of images that only includes cars and animals.

When it comes to machine learning, the phrase “one size does not fit all” is especially true. That’s why we offer customized datasets that are tailored to your specific business needs.

High quality Datasets for Machine Learning
by clickworker

Machine Learning Datasets by clickworker

Datasets for Machine Learning and Artificial Intelligence are important to generate high-quality results. In order to achieve this, you need access to large amounts of data that meet all the requirements for your specific learning objective. This is often one of the most difficult tasks while working on a machine learning project.

At clickworker, we understand the importance of high-quality data and have gathered a large international crowd of 4.5 million Clickworkers who can help you prepare your datasets. We offer a wide variety of datasets in different formats, including text, images and videos. Best of all, you can get a quote for your customized Machine Learning Datasets by clicking on the link below. There are links to find out more about machine learning datasets, as well as information about our team of experts who can help you get started quickly and easily.

AI Dataset Services

Quick Tips for your Machine Learning Project

  • 1. Make sure all data is labeled correctly. This includes both the input and output variables for your model.
  • 2. Avoid using unrepresentative samples when training your models.
  • 3. Use a variety of datasets in order to train your models effectively.
  • 4. Choose datasets that are relevant to your problem domain.
  • 5. Data Preprocessing – so that it’s ready for modeling purposes.
  • 6. Take care when selecting machine learning algorithms; not all algorithms are suitable for every dataset type.


Machine learning becomes more and more important in our society. However, it’s not just for the big guys–every company can benefit from machine learning. To get started, you need to find a good dataset and database. Once you have those, your data scientists and data engineers can take your tasks to the next level. If you’re stuck in the data collection stage, it may be worth to reconsider how you approach collecting your data.

FAQs on Machine Learning Datasets

Where can I find machine learning datasets?

There are many sources for machine learning datasets. Some popular sources include the UCI Machine Learning Repository, Kaggle Datasets, and Amazon's AWS Datasets.

What is the difference between dataset and database?

A dataset is a file that contains data, while a database is an organized collection of datasets. A database can be divided into multiple tables, each of which consists of rows and columns. A dataset can be stored in a database, but it can also exist independently.

How do you prepare a machine learning dataset?

The first step is to understand your data. This includes understanding the features (columns) and the target variable (what you're trying to predict). Once you have a good understanding of your data, you can start to clean it. This includes dealing with missing values, outliers, and other issues. Once your data is clean, you can split it into training and test sets. The training set is used to train your machine learning model, while the test set is used to evaluate the performance of your model.