Runway vs Synthesia
A source-aware comparison of pricing, documented capabilities and workflow fit.
Short answer
- Price: not directly comparable — Runway is free tier available, Synthesia is pricing not verified.
- How to start: Runway is free tier available, Synthesia is pricing not verified.
- Where they differ: only Runway has mobile app and only Synthesia has sso (saml); both offer public api.
These lines are generated from the pricing we track, not from a paid placement. How we score tools.
What Runway is
Runway generates and edits video with AI, covering text-to-video, inpainting and motion tools. It is aimed at people who edit rather than prompt: generation sits next to inpainting, masking and motion tools in one timeline. Output length and consistency remain the practical limits, which is why it supplements rather than replaces production.
What Synthesia is
Synthesia produces videos of AI presenters speaking a script, in many languages, without filming. The practical use is internal material that would otherwise never be made — training modules, product updates, compliance briefings — where a studio shoot cannot be justified and a rewrite means re-recording. Changing a sentence means editing text and regenerating, not booking a camera again. It is weakest where a real presence matters: marketing that depends on a recognisable face.
Side by side
| Runway | Synthesia | |
|---|---|---|
| Category | AI Tools | AI Tools |
| How to start | Free tiernot a monthly price | Not verifiednot a monthly price |
| Public API | Yes | Yes |
| Mobile app | Yes | No |
| Open source / self-hostable | No | No |
| SSO (SAML) | No | Yes |
| Visit | Runway ↗ | Synthesia ↗ |
What Runway is built to do
- Text and image to video
- Generates clips from prompts or reference stills.
- Video inpainting
- Removes or replaces objects across frames.
- Editing timeline
- Combines generated and filmed footage in one editor.
What Synthesia is built to do
- Script-to-video
- Paste a script and generate a presenter reading it, with no camera or studio.
- Multilingual output
- The same script rendered in many languages from one source.
- Edit and regenerate
- Revising the text regenerates the video, so updates do not mean re-recording.
- Custom avatars
- Paid tiers can build an avatar from footage of a real presenter.
Choose Runway if
- Video teams and creators exploring generative footage.
Choose Synthesia if
- Companies producing training or product videos at volume.
Evidence and freshness
Where a claim on this page comes from a vendor page, it is linked here.
Runway: pros & cons
- Leading quality in generative video
- Editing tools alongside generation
- Fast iteration on ideas
- Credits are consumed quickly
- Output still needs human editing
- Costs mount on longer projects
Synthesia: pros & cons
- No filming or studio needed
- Many languages and avatars
- Updating a video means editing the script
- Presenters still read as synthetic
- Priced per video minute
- Custom avatars cost extra
Our verdict on Runway
The strongest generative video tool for now. Budget credits carefully; experimentation is expensive.
Our verdict on Synthesia
Excellent for content that must be updated often. Marketing work where authenticity matters still needs people.