Synthesia

Synthesia is an AI video generation platform that turns text scripts into videos featuring digital presenters. Users write or paste a script, pick from a library of AI avatars (or build a custom one trained on a real person), choose a voice and language, and the platform renders a finished video without any cameras, actors, or editing software involved. It supports over 130 languages and includes tools for templates, screen recording, translation and dubbing of existing videos, and basic editing like adding text, media, and backgrounds.

It's built mainly for corporate and enterprise use: training and onboarding videos, internal comms, product explainers, sales and marketing content, and localization of existing video libraries into multiple languages. Teams use it to avoid the cost and logistics of traditional video production, especially for content that needs frequent updates or many language versions. It has enterprise features like brand kits, team workspaces, SSO, and API access for generating videos programmatically at scale.

What sets Synthesia apart is how far it's pushed avatar realism and its focus on business workflows rather than creative or entertainment video. It was one of the earliest and best-funded companies in this space, has custom avatar options trained with a person's consent, and has become something of a category name for AI talking-head video, competing with tools like HeyGen, Colossyan, and D-ID.