Best AI Video Generators
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How we chose these picks
We compared each tool's published features, free-plan availability, pricing transparency and typical use cases, using official sources as our primary reference. Affiliate commissions never influence which tools appear or how they are ranked. See our Editorial Policy for the full methodology.
AI video generators let you create presenter-style videos from a written script, with no camera, studio or actors. They are popular for training, explainers, marketing and localised content. This guide compares two well-known options, Synthesia and HeyGen, so you can see which fits your project.
Last reviewed: September 28, 2026. Features, limits and pricing change often, so confirm details on each official website.
Quick comparison
| Tool | Best for | Free plan | Pricing | Main trade-off |
|---|---|---|---|---|
| Synthesia | Corporate training and explainer videos | Verify on official site | Check official site | Custom avatars and more minutes need higher tiers |
| HeyGen | Avatar-led marketing and translated video | Verify on official site | Check official site | Usage limits scale with plan; realism varies by avatar |
How to choose an AI video generator
- Need consistent training or internal videos? Prioritise templates, language support and team features.
- Reaching audiences in several languages? Look at translation and localisation tools.
- Want cinematic or highly creative video? Avatar-based tools may not suit; they are strongest for presenter-style content.
- Testing before committing? Check each provider’s current trial or free options first.
Synthesia
Synthesia turns a script into a video presented by an AI avatar, in many languages, without any filming. It is widely used for staff training, product explainers and internal communications where speed and consistency matter. Avatars can look synthetic up close, and custom avatars and extra minutes need higher-tier plans. Read the full Synthesia overview.
HeyGen
HeyGen also creates avatar-led videos from text or voice, with translation and localisation features that help you reach new audiences and produce multiple versions quickly. Some advanced features sit on higher plans and avatar realism can vary between styles. Read the full HeyGen overview.
Frequently asked questions
What is an AI video generator?
It is software that creates video from text, usually with an AI avatar and synthetic voice presenting your script.
Do I need a camera or actors?
No. That is the main appeal, though the result looks different from filmed footage.
Are AI avatar videos suitable for marketing?
Often, for explainers, product walkthroughs and localised content. For highly emotional or cinematic storytelling, filmed video may still be a better fit.
Are there free AI video generators?
Some providers offer limited free plans or trials. These change often, so check each official website.
Do you earn money from these links?
Some links may be affiliate links. This never affects which tools we include. See our Affiliate Disclosure and Editorial Policy.
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