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Syllaby is a broad video studio with faceless video, AI avatars, voice cloning and a bulk scheduler where you preview each video before it goes out, while ShortFast is a narrower pipeline that generates and publishes faceless and UGC-style shorts on a recurring schedule you set once.
Syllaby is the broader product. It makes faceless videos and avatar videos, clones your voice from a 30-second sample, handles long-form, lets you choose among several AI video models, and schedules to seven platforms from a content calendar. ShortFast does one narrower thing: generate faceless or UGC-style shorts and publish them on a recurring schedule to TikTok, Instagram Reels and YouTube Shorts.
Syllaby is the better pick if you want your own face and voice in the videos, if you make long-form as well as shorts, if you want to pick specific AI video models, or if you post to Facebook, LinkedIn, X or Threads. Its $9 Starter plan is also the cheapest way to try a tool like this, at about seven faceless videos a month.
ShortFast is the better pick if you want a channel that runs itself. Syllaby's documented workflow is generate, preview, adjust, schedule, one video at a time, with no recurring generate-and-post automation. ShortFast is built around exactly that automation, with timezone-aware scheduling per automation, a REST API, webhooks and an MCP server. If you would rather review every video before it posts, that difference counts against ShortFast, not for it.
Side by side
| Dimension | ShortFast | Syllaby |
|---|---|---|
| Starting point | A topic, a prompt or a script. No source footage needed. | An idea from trending research, your own script, a text prompt, an audio file or a URL. |
| Core job | Generate the video, then publish it on a schedule across your accounts. | Idea, script, video, then schedule. Each video is previewed and scheduled individually; no recurring autopilot series is documented. |
| Visuals | 27 styles: licensed stock footage, AI video, or AI images in a fixed art style. AI presenters for UGC-style video. | AI images and AI video from a choice of models including Veo 3.1, Seedance, Kling and Grok Imagine, stock footage, ten named art styles, and stock or cloned avatars. |
| Voice | Generated AI voiceover. No voice cloning. | 100+ AI voices in 29+ languages. Voice cloning from a 30-second sample, with 0, 1, 3 or 5 clones by plan. |
| Auto-publishing | Built in, through the official APIs. Posts go out on a recurring schedule you set once. | Scheduler, content calendar and bulk scheduler, unlimited on every plan. You generate and schedule; it posts at the set time. |
| Platforms | TikTok, Instagram Reels, YouTube Shorts. | YouTube, TikTok, Instagram, Facebook, LinkedIn, X and Threads. |
| Multi-account | Timezone-aware schedules per automation. 1, 3 or 6 social accounts by plan. | Multiple social profiles can be connected. Per-plan limits are not published. |
| Pricing model | Monthly plans with credits: $19 (1,000), $39 (5,000) or $99 (10,000) a month. 20% off billed yearly. | Credits. Starter $9 a month, monthly only, about 7 faceless videos. Basic $29 for about 38. Standard $78 for about 115. Premium $153 for about 384. Faceless video costs 13 credits a minute, avatar video 50. |
| Trial or free tier | $1 for a 3-day trial on monthly plans. No free tier. | No free trial, per their pricing FAQ, but a free signup gives a first video plus 50 credits. Refunds within the first 7 days if no credits were used, per the refund policy. |
| Developer access | REST API, webhooks, MCP server. | REST API v2, 30 requests a minute by default. No MCP server mentioned. |
Syllaby changes its product and pricing independently of us. Check their site for current details before deciding, and tell us if anything here is out of date.
Syllaby is credit-based, and the credits are spent per minute of video. A faceless video costs 13 credits a minute, an avatar video 50 credits a minute plus 6 a minute to export, and Veo 3 generation is charged per second, at 4 credits for Fast and 11 for Quality. Charges round up to whole minutes. Trending-idea research costs 15 credits each and scripts cost 1 credit a minute.
The plans are Starter at $9 a month, monthly billing only, with 100 credits, or about seven faceless videos, and 1 GB of storage. Basic is $29 a month, or $24.67 a month billed annually, for 500 credits, about 38 videos, and one voice clone. Standard is $78 a month for 1,500 credits, about 115 videos, and three clones. Premium is $153 a month for 5,000 credits, about 384 videos, and five clones. Extra credits can be added any time. On refunds, the pricing FAQ and the refund policy disagree, so go by the stricter one: within the first 7 days of purchase, and only if no credits have been used.
ShortFast prices by monthly credits. Starter is $19 a month for 1,000 credits, one automation and one social account. Pro is $39 for 5,000 credits, three automations, up to three posts a day per automation and three accounts. Advanced is $99 for 10,000 credits, six automations, six accounts and long videos up to 15 minutes. Yearly billing takes 20% off. A typical stock-footage video uses about 12 credits, an AI art-style one about 25 and a fully animated one about 464. Syllaby is cheaper to start; for footage and illustrated videos, ShortFast's credits go further from the middle tier up.
Syllaby's documented flow has four steps: generate an idea, write or edit the script, generate the video with the AI model you choose, then schedule and publish. You preview the result, adjust the script if needed, and put it on the calendar. The bulk scheduler lets you queue many videos at once, but nothing on the site describes a series that generates and posts new videos on its own after you set it up once.
ShortFast is that series. You set up an automation once, and from then on it writes the script and hook, renders the video from stock footage, one of 27 fixed styles or an AI presenter, adds the voiceover and burned-in captions, and publishes to TikTok, Instagram Reels and YouTube Shorts through the official APIs. Each connected account has its own queue and a schedule in its own time zone. Pro allows up to three posts a day per automation.
Which is better depends on how much you want to touch. If you are producing avatar videos of yourself, or long-form, or picking a different AI model per project, reviewing each result is part of the job and Syllaby's flow fits. If you are running faceless channels where the point is volume and consistency, a review step for every video becomes the bottleneck, and that is the case ShortFast is built for.
Both make faceless short videos from a topic or script, with an AI voiceover, captions and stock or AI-generated visuals, and both post to YouTube, TikTok and Instagram. If a faceless short posted to those three platforms is all you need, either tool produces it, and the differences are in cost per video, how the posting is triggered, and what else comes in the box.
The boxes differ a lot. Syllaby adds avatars, including Real Clone Studio, which needs a consent video and a green-screen recording of at least five minutes in 4K at 60 fps and is sold separately, plus voice cloning, AI thumbnails, URL-to-video, audio-to-video, social analytics and mobile apps. ShortFast adds UGC-style video with AI actors, automated series that post themselves, A/B hook variations (coming soon), per-automation schedules, webhooks and an MCP server. Both have a REST API.
Neither is the wrong choice. They are aimed at different people. Syllaby's audience is marketers and creators who want one subscription for many kinds of video and are fine scheduling each one. ShortFast's audience is channel operators, agencies and businesses that want a video a day going out on its own. Syllaby's free first video with 50 credits and ShortFast's $1 three-day trial make it cheap to try both against the same topic.
FAQ
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A cheaper autopilot tool for YouTube and TikTok, without Instagram.
Learn moreComparisonAnother autopilot faceless tool, with seven platforms and credit pricing.
Learn moreComparisonRepurposing text and long video into short clips.
Learn moreNichesWhich niches suit a channel that posts on its own.
Learn moreToolThe starting-from-nothing case, free to try.
Learn moreThree days of full access. If Syllaby suits you better, that's a useful thing to find out cheaply.