Unsplash is described as 'provides free (do whatever you want) high-resolution photos' and is a popular Stock Photo Service in the Photos & Graphics category. There are more than 50 alternatives to Unsplash for a variety of platforms, including Online / Web-based, Windows, Linux, Self-Hosted solutions and Wordpress. The best alternative is Openverse, which is both free and Open Source. Other great apps like Unsplash are Pixabay (Free), Wikimedia Commons (Free, Open Source), Pexels (Free) and Freepik (Freemium).
Freepik offers users, high quality graphic designs: exclusive illustrations and graphic resources carefully selected by our design team in order to provide our users with great content that can be used in both personal and commercial projects.
Lorem Picsum provides an easy way for web developers to get elegant placeholder images. API access is available through simple and intuitive urls like picsum.photos/200/300 for a random 200px x 300px image.