Captions vs Synthesia
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose Captions if you want ai video creation with avatars, captions, and dubbing (Copilot, freemium); choose Synthesia if you want ai video platform that turns scripts into avatar-presented videos (Assistant, freemium).
| Captions | Synthesia | |
|---|---|---|
| What it is | AI video creation with avatars, captions, and dubbing | AI video platform that turns scripts into avatar-presented videos |
| Type | agent | agent |
| Autonomy | Copilot | Assistant |
| Pricing | freemium · $12.99/mo (Starter, billed annually) | freemium · $18/mo (Starter, billed annually) |
| Best for | consumers, smb | smb, mid-market, enterprise |
| Deployment | saas | saas, api |
| Modalities | text, video, voice | text, image, voice |
| Models | proprietary | proprietary |
| Protocols | none | rest-api |
| Integrations | iOS, Web | SCORM, PowerPoint, LMS platforms |
| Capabilities | 3 documented | 4 documented |
Captions
- +AI actors and personalized twins for fast, camera-free social video
- +Automatic captions plus dubbing and lip-sync across 28+ languages
- +Approachable, creator-focused mobile and web app
- -Video-generation minutes are capped by tier; heavy use needs upper plans
- -AI avatar creation and deep customization are gated to Pro and Business tiers
Synthesia
- +Large avatar library and 140+ language voices with one-click video translation
- +Strong fit for training, L&D, and internal comms at scale; dramatically cheaper than filmed video
- +Collaborative editor with brand controls and an API for programmatic generation
- -Credit/minute caps on lower tiers limit how much video you can render
- -Avatar delivery, while improving, can still read as synthetic for high-polish brand work
Which should you choose?
Captions is ai video creation with avatars, captions, and dubbing, best for consumers, smb. Synthesia is ai video platform that turns scripts into avatar-presented videos, best for smb, mid-market, enterprise. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.