Pexels

Business model: Free, commercial use

Pexels is a free stock image and video library that is licensed under the Pexels license, which is similar to the Creative Commons CC0 license. This means that you can download, copy, distribute, and modify images licensed by Pexels without attribution or permission from the photographer or creator. The site has hundreds of thousands of images that are hand-picked from photos uploaded by the Pexels community. All photos are tagged and searchable, making it easy to find what you're looking for.

Unsplash

Business model: Free, commercial use

Unsplash is a stock photography site that is home to over 2.5 million beautiful stock photos shot by a global community of photographers. All images are free to use for whatever purpose you wish, and Unsplash adds new images to download every day. When you create a free account with this stock photography site, you can collect photos and access them from your iPhone, iPad, or computer.

Adobe Stock

Business model: Premium, 10 free downloads, commercial use

Adobe Stock is a provider of ready-to-use photos, illustrations, videos, templates and 3D assets for creative projects. The library includes more than 90 million individual elements that come with a royalty-free license. What’s different about Adobe Stock is that it’s built right into your Creative Cloud software. This means that you can access Adobe Stock directly from your favorite Creative Cloud apps like Photoshop, Illustrator, and InDesign. You can also purchase Adobe Stock as a multi-asset subscription.

Freepik

Business model: free (attribution)

Freepik is another great free stock image site for creators who are looking for professional Photoshop templates and stock images. The site has over four million assets: vectors, illustrations, also available for download. Attribution is required to use Freepik’s stock for commercial or personal use. This means that you must give credit to the creator of the stock image when you use it in your work.

Canva

Business model: paid and free

Canva is a graphic design tool that offers free stock images on its site. You can use Canva to create designs for social media, presentations, posters, and more. If you want to put your images in a social media post anyways, canva is a great place to go. To find free stock images on Canva, you can visit the Canva Photos site or use the Canva editor. The Canva library is home to millions of paid and free stock photos that you can download or use in the platform’s design editor. You can switch between images and colors without navigating between tabs. Canva's stock photos cover a wide range of topics, including business, nature, food, and more. You can also collaborate with others to create your own masterpiece.

iStock by Getty Images

Business model: paid and free

iStock by Getty Images is another leading stock photography website that offers huge stacks of popular photos, illustrations, pieces of clip art, videos, and audio clips. It’s also known for compensating contributors well. While you’ll have to pay a licensing fee for most assets, iStock does offer weekly free stock photos to download (you need to register though). The licensing model for iStock is based on credits or subscriptions.

Pixabay

Business model: free

Pixabay is a free stock website that has over 2.2 million stock images, videos, and music clips available for download by the Pixabay community. It offers royalty-free photos from contributors, which anyone can manipulate and use without permission or any attribution to the artist. Stock images on Pixabay cover a wide range of topics. All photos are released under the Pixabay license, which is similar to the Creative Commons CC0 but slightly more restrictive.

Shutterstock

Business model: paid

Shutterstock is ideal for freelancers, bloggers and individuals looking for best price on low numbers of images (in a subscription). On-demand downloads are comparably more expensive. They have huge stacks of cheap images for those looking for something as a cutout or base of an image that needs then to be heavily edited. They also have some quality photos and 10 free trial downloads. If you're looking for finished images, ready to use, you might look elsewhere.

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YOu might also want to check out: Burst by Shopify, Rawpixel, picjumbo, Life of Pix, Depositphotos, ISO Republic, Picspree, FreeImages, Gratisography. Go to i12c to see a collection of creative images and desktop backgrounds and iphone wallpapers free to download (10 downloads for free in trial for Adobe Stock)