Most AI video apps export 9:16 MP4s built for TikTok and Reels; Pose, Captions, and Creatify all offer direct platform-optimized export. What separates them is what else comes with the file — a watermark, an upscale step, or a format that needs no adjustment before you upload it.
This compares export specs across four AI video apps, based on each provider's current public plans — verify before subscribing.
- Most AI video apps export 9:16 MP4s for TikTok and Reels; Pose, Captions, and Creatify offer direct platform optimization.
- Pose exports 1080×1920 MP4 (with a 4K option) at a fixed 9:16 ratio, no watermark on any paid plan.
- Captions and Creatify both export vertical MP4 formats built for TikTok and Reels; free tiers on tools in this category commonly add a watermark, so check the specific plan.
- None of these apps publish directly to TikTok or Instagram on your behalf — you download the MP4 and upload it yourself.
AI video app export specs for TikTok and Reels (2026)
| App | TikTok export | Reels export | Watermark | Format |
|---|---|---|---|---|
| Pose AI | Yes — 9:16 MP4, direct upload | Yes — same export | No, on any paid plan | MP4, 1080×1920 (4K option) |
| Captions | Yes — vertical MP4 | Yes — vertical MP4 | Free plan has no AI credits; check current paid-tier terms | MP4, vertical |
| Creatify | Yes — built for TikTok/Reels ad formats | Yes — built for TikTok/Reels ad formats | Not detailed in public plan — verify current terms | MP4, vertical |
| Synthesia | No direct TikTok optimization — general-purpose export | No direct Reels optimization — general-purpose export | Free tier is a 10 min/month evaluation cap, not a watermark | MP4, configurable aspect ratio |
Pose is the only one of these with a confirmed no-watermark policy across every paid plan, not just a higher tier.
What "export" doesn't mean here
None of the apps compared here publish or schedule a post to TikTok, Instagram, or YouTube directly — "export" means the app hands you a finished video file in the right format, and you upload it yourself through the platform's own app or Ads Manager. If you're looking for a tool that also handles scheduling and posting, that's a separate category of app.
See the full spec for Pose's TikTok ad exports on the TikTok video ads page.