A Synthesia alternative for ads, not for training videos
Synthesia is an enterprise video platform for training, onboarding, internal communications and sales enablement, with a studio-polished presenter reading your script in 160+ languages. Sepia makes performance ad creative: vertical UGC-style ads built from a product photo and a brief. If you need a compliance module, Synthesia is the right tool and this page will say so plainly. If you need creative to test on TikTok and Meta, read on.
Direct comparison
Synthesia vs Sepia
These two are often shortlisted together because both generate a person on camera from a script. They are built for different jobs, and the avatar look is the tell.
| Criterion | Synthesia | Sepia |
|---|---|---|
| What it is built for | Enterprise video: technical and compliance training, onboarding, internal communications, sales enablement. | Paid social ad creative: vertical UGC-style video for TikTok, Reels and Shorts. |
| Starting point | A script, a document, a link, a screen recording or a slide deck, turned into a presenter video. | A product photo and a short creative brief. |
| On-screen talent | 240+ AI avatars with a deliberately corporate presenter look, customisable with your clothing, logo and brand colours. | A creator cast for the ad, with the look of someone filming themselves. |
| Languages | Avatars speak 160+ languages, with one-click translation of a whole video on higher plans. | Ads are produced per market from the brief rather than dubbed from one master. |
| Where the output goes | Built to land in an LMS, with branching, quizzes and SCORM packaging on higher plans. | 9:16 with burned-in captions and music, ready to upload as an ad. |
| Pricing model | A free tier with a monthly minutes allowance, then tiered plans and an enterprise offer. | A free storyboard preview, then one-time credit packs or monthly plans. Credits do not expire. |
Choose Synthesia when
You are producing training, onboarding, compliance or internal communication video at company scale, and you need LMS delivery, quizzes and translation of a single master into many languages.
Choose Sepia when
You are buying paid social and need a steady supply of vertical UGC-style variations to test. A polished corporate presenter is the wrong register for a feed, however good the avatar is.
Synthesia product and plan details checked on August 11, 2026. Features and plans change often in this category. Official product page Official pricing page
The right register for a feed
A studio presenter reads as an announcement. A creator filming themselves reads as a recommendation. Sepia is tuned for the second, which is what performs against organic content in a vertical feed.
No seat, no annual commitment
Enterprise video is sold by the seat and the year. Sepia sells credits: a free storyboard preview, then a one-time pack or a monthly plan, with credits that do not expire. You can run a single campaign without signing anything long.
Hooks in series for creative testing
One product and one brief produce several ads, each opening on a different angle. That is the unit of work in paid social: not one perfect video, but enough variants to find out what the audience responds to.
Frequently asked questions
Can Synthesia make social ads?
It can produce vertical video with an avatar reading a script, and some teams use it that way. The limitation is register rather than quality: the avatars are built to look like a corporate presenter, which is the opposite of what UGC-style ad creative is imitating.
Can Sepia make training videos?
It is not built for that. There is no LMS export, no quizzing, no SCORM, and no single-master translation workflow. For learning and development, Synthesia is the better tool and we would rather say so than sell you the wrong thing.
Do the two overlap at all?
Mostly on product marketing video, where either could work. Beyond that they serve different departments: Synthesia sits with learning and development or internal comms, Sepia sits with paid acquisition.