Synthesia is an AI video platform for business that creates videos presented by AI avatars with AI voiceovers. Its Assistant and Syren video agent turn a prompt, document, PowerPoint or link into an on-brand draft with script, scenes and a presenter, and Sessions run live avatar conversations for roleplay practice and surveys.

Key features:

Generates videos from prompts, documents, slides or URLs.
Creates personal avatars from a photo or short video, with voice cloning and consent checks.
Translates videos into 140+ languages and dubs external videos in the speaker's voice.
Runs roleplay sessions that coach and score learners, and avatar-led survey interviews.
Enforces brand kits, roles and approvals, and adds quizzes, CTAs and branching.
Publishes via link, embed or SCORM, with analytics and an API for video, dubbing and live avatars.

Synthesia is SOC 2, GDPR and ISO 42001 compliant with SAML/SSO. The free Basic plan includes 10 minutes of video a month with a watermark. Starter is $19/month and Pro is $89/month with more credits and personal avatars; Enterprise is custom-priced through a demo.