Synthesia

What it does

Synthesia lets you create videos with AI-generated presenters by typing a script. You choose an avatar — a realistic digital human — select a language and voice, type or paste your script, and the platform renders a video of the avatar delivering your content. The avatars have natural lip-syncing, subtle gestures, and convincing eye movement. You can add slides, screen recordings, images, and text overlays alongside the presenter. The entire process happens in a browser-based editor with no software to install and no camera required.

Who it's for

The clearest use case is corporate learning and development. Training videos, onboarding walkthroughs, compliance explainers, and internal communications are where Synthesia shines. These are videos that need to look professional but do not need to be cinematic. They often need frequent updates (policy changes, new product features), and re-rendering a Synthesia video with updated text is vastly cheaper than rebooking a film crew. The multilingual capability is a genuine differentiator — producing the same training video in 30 languages by swapping the script text is something no traditional production workflow can match on cost or speed.

Avatar realism and limitations

The avatar quality has improved significantly over the past year. The latest generation of presenters crosses the threshold from "obviously AI" to "probably AI but good enough." Lip sync is accurate, facial expressions are natural during normal speech, and the overall presentation is professional. That said, the uncanny valley has not been fully escaped. Certain pauses, transitions between emotions, and hand gestures can feel slightly mechanical. For a training video where the focus is on content delivery, this is rarely a problem. For marketing or customer-facing brand content where warmth and authenticity matter, the limitations become more noticeable.

The bottom line

Synthesia's value proposition is clearest when you compare it to the alternative, not in a vacuum. A single professional training video can cost thousands of dollars in production time, talent, and editing. Synthesia lets you produce comparable results for a fraction of that cost and update them instantly. The minute-based pricing requires some planning — a team producing long-form content regularly will see costs climb — but for most corporate use cases, the math works strongly in Synthesia's favor. The free tier is limited but useful for evaluating whether the avatar quality meets your standards before committing.