There are several websites that offer AI voice over services, including AI Voice Generator, Kapwing, Murf AI, Speechify, and Animaker. These websites use artificial intelligence technology to generate realistic and human-like voices for a variety of purposes such as narration, product demos, phone systems, audiobooks, and more. They offer a range of voice styles and languages to choose from, and some even allow users to fine-tune the voice to their liking. To find an AI voice over similar to the one on the Instagram post, you can try out these websites and explore their features to see which one suits your needs best.