If you want to create your own avatars for your video projects, Ready Player Me is a full featured, customizable avatar solution. It's built to work with common game engines like Unity and Unreal, and you can fine-tune it with a Developer Studio. With thousands of possible combinations, including branded and IP assets, it's good for social experiences, virtual meeting tools and games.
HeyGen is another strong contender, particularly if you want AI-generated avatars and voices. It's got more than 100 avatar choices and 300+ premium voice choices, too, along with customizable clothing and a variety of templates for different situations. It's designed to make video creation as easy as possible, so it's good for businesses and individuals who want to create high-quality content without a lot of hassle.
Avaturn is a powerful tool for turning 2D selfies into photorealistic 3D avatars with lots of customization. It can export to 3D worlds like Blender, Unity and Unreal Engine, and has an SDK for developers to build it into their own projects. If you want to animate your avatars for use in games or other interactive scenes, this is a good option.
Last is DeepBrain AI, which lets you create videos from text prompts with customizable AI avatars and natural text-to-speech voices. It can handle multiple languages and has features like customizable gestures and multiple avatars in a scene, so it's good for a variety of uses, like education, training and marketing.