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Short AI (short.ai) and ShortFast (shortfast.com) are different products from different companies. Short AI makes Reddit-story, fake-text, dialogue and AI-story videos from templates, cuts long videos into clips and schedules posts to eight platforms; ShortFast writes, renders and posts faceless shorts from a topic, on a schedule.
ShortFast is our product, made by SachaSoft LLC; Short AI is a different product from a different company, and it does two jobs: it makes faceless videos from ready-made formats such as Reddit stories, fake-text chats, cartoon dialogues and AI stories, and its AI clip maker cuts long videos into short clips. Pick Short AI if you want those formats, clips from long videos you already have, or one scheduler for eight social platforms; pick ShortFast if you want faceless shorts written from a topic in one of 27 styles and posted to TikTok, Instagram Reels and YouTube Shorts on a schedule, with each next episode written for you.
Like for like, the two faceless generators overlap: both start from a topic or your own script and add a voice and captions. Short AI builds each video on a template, such as comment frames over gameplay or a chat layout, and its story, dialogue, Reddit and fake-text formats cost 20 credits per 30 seconds of video; ShortFast renders it in a style, from licensed documentary stock footage to stick figures or AI video, and its automations write and post a new episode for every posting slot. Clipping is a different job: ShortFast starts from a topic and doesn't clip videos you upload, so if that's your main need, Short AI or a dedicated clipper such as OpusClip fits better.
ShortFast's plans are $29, $39 and $99 a month, and every monthly plan starts with a 3-day trial for $1; there's no free plan. On October 24, 2026, Short AI's Creation plans, which hold the credits for videos, captions and clips, were $19, $30 and $60 a month, and its pricing page listed a free plan for scheduling posts to 3 channels. If you were looking for Short AI itself, it's at short.ai.
Side by side
| Dimension | ShortFast | Short AI |
|---|---|---|
| Core job | Write, render and post faceless short videos from a topic, on a schedule. | Per its FAQ, “an AI-powered short video generator that helps you quickly create short videos and schedule their posts”. It also clips long videos. |
| Where a video starts | A topic or a prompt: it writes the script and hook. Or paste your own script. | A topic, a template, a prompt or your own script. Reddit-story videos can also start from a Reddit post or a TikTok link. |
| Formats and visuals | 27 styles: licensed documentary stock footage, AI video, or AI images in a fixed art style (stick figures, cartoon explainer, comic book, anime, whiteboard, claymation…). AI actors for UGC-style video. | Templates: Reddit stories over gameplay such as Minecraft, fake-text chats, animated-character dialogues, superhero videos, and AI stories over 12 background styles. Its AI video tools page also lists Sora 2, Veo 3.1 and Kling 2.5 Turbo Pro generators. |
| Long videos you already have | Not its job: ShortFast starts from a topic and doesn't clip videos you upload. You can upload your own clips and swap them into any scene. | Its AI clip maker turns an uploaded or linked video of up to 3 hours into clips of 15 seconds to 5 minutes, with virality scoring, framing, captions and B-roll. |
| Voice and captions | 40+ voices. Burned-in, word-by-word captions in 60+ languages, auto-detected, in 9 styles and 18 fonts. | Over 1,000 voices in 32+ languages; Pro voices on Pro and Enterprise. 14+ caption styles with emojis and highlights, in 32+ languages. |
| Video length | Up to 3 minutes on every plan, or 8 to 15 minutes on Advanced. | Its FAQ says it doesn't limit each video's duration: length follows the script, and most creators tend to make videos of 0 to 2 minutes. |
| Series and posting | An automation writes the next episode for each posting slot and posts it to TikTok, Instagram Reels and YouTube Shorts, or emails it to you. 1, 3 or 6 social accounts by plan. | Creation plans post to TikTok, YouTube, Instagram and Facebook. Its scheduler covers eight platforms, with a content calendar and bulk scheduling; its faceless-video page says it can “automatically generate and schedule daily posts”. |
| AI agents and developers | REST API, webhooks and an MCP server for Claude, Cursor and other agents. Free API tier: 50 credits every 30 days, 3 watermarked renders, download only. | Its homepage and pricing page don't mention an API or an MCP server. |
| Pricing and free plans | Starter $29 (2,000 credits), Pro $39 (5,000) and Advanced $99 (15,000) a month; 20% to 48% off billed yearly; extra credits $10 per 1,000. No free plan: every monthly plan starts with a 3-day trial for $1. | Creation plans, which hold the credits: Basic $19 (1,600 credits), Pro $30 (3,600) and Enterprise $60 (7,200) a month; up to 15% off billed yearly. Scheduling has separate Channel plans: Free, or $15 a month, for 3 channels. Its pricing page lists no free Creation plan. |
| Refunds | At ShortFast's discretion, per its terms; the $1 three-day trial lets you test first. | Per its terms, subscription payments are non-refundable, with no credits for partly used periods; after you cancel, access lasts to the end of the paid period. To avoid the next charge, you must cancel 5 days before the renewal date. |
Short AI 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.
ShortFast and Short AI plans
Prices from each vendor's pricing page, checked
| Plan | Monthly | Billed yearly, per month | What the plan includes (each vendor's own units) |
|---|---|---|---|
| ShortFast Starter | $29 | $15 | 2,000 credits: about 80 one-minute stock-footage or 50 AI art-style videos, 1 automation, 1 social account, videos up to 3 minutes |
| ShortFast Pro | $39 | $31 | 5,000 credits, 3 automations, 3 social accounts, videos up to 3 minutes |
| ShortFast Advanced | $99 | $79 | 15,000 credits, 6 automations, 6 social accounts (2 profiles), videos up to 3 minutes or 8 to 15 minutes |
| Short AI Basic (Creation) | $19 | $19 | 1,600 credits a month: up to 40 faceless videos or 53 minutes of auto captions; Basic voices |
| Short AI Pro (Creation) | $30 | $25.50 | 3,600 credits a month: up to 90 faceless videos or 120 minutes of auto captions; Basic and Pro voices |
| Short AI Enterprise (Creation) | $60 | $51 | 7,200 credits a month: up to 180 faceless videos or 240 minutes of auto captions; Basic and Pro voices |
| Short AI Basic (Channel) | Free | Free | Scheduling for 3 channels: up to 3 posts a day per channel, up to 10 scheduled posts per channel at a time |
| Short AI Essentials (Channel) | $15 | $12.50 | Scheduling for 3 channels (each extra channel $5 a month, or $4.17 billed yearly): unlimited scheduled posts, up to 10 posts a day per channel |
Short AI's AI story, dialogue, Reddit story and fake-text videos cost 20 credits per 30 seconds, superhero videos 20 credits each before images, auto captions 30 credits a minute and auto clips 20 credits a minute; its video and minute counts are its own figures. The two companies' credits don't convert. ShortFast's video counts are estimates, not limits.
Sources: ShortFast pricing · Short AI pricing · Short AI homepage · Short AI faceless video · Short AI clip maker · Short AI scheduler · Short AI terms
Short AI is built around ready-made formats. Its faceless-video page lists Reddit stories with customizable comment frames over gameplay such as 1080p Minecraft scenes; fake-text chats in iPhone, WhatsApp or Instagram layouts, with your own messages, contact names and pictures; cartoon dialogues with animated characters; and AI stories over background styles from watercolor and manga to oil painting. Its Reddit-story page says videos download without a watermark.
It also does a job ShortFast doesn't: clipping. Its AI clip maker takes a long video you upload or link, such as a podcast, webinar or livestream of up to 3 hours, picks highlights with a virality score and turns them into clips of 15 seconds to 5 minutes, framed for social platforms, captioned and with B-roll. Its scheduler covers eight platforms and posts images, carousels and Stories as well as videos. Its TikTok scheduler page says posts publish directly through TikTok's official API, and it describes an analytics dashboard for views, comments, shares and engagement rates.
ShortFast fits when you want a series that runs itself. From a topic, it writes the script and hook and renders a faceless video in one of 27 styles, with a voiceover and burned-in captions: licensed documentary stock footage, AI video, or AI images in a fixed art style such as stick figures, comic book, whiteboard or claymation. It also makes UGC-style videos with AI actors for ads.
Each automation follows a series brief of up to 500 characters and writes the next episode for every posting slot: a new topic, script, title, description and footage, in the same tone, format and length, with recent titles checked. It posts the video to TikTok, Instagram Reels and YouTube Shorts on the schedule you set, or emails it to you, with no approval step.
Automated channels live under the platforms' rules, whichever tool you use. YouTube's monetization policies, under “Generic or Repetitive Content”, say channels where content “feels interchangeable from video to video” aren't allowed to monetize, and its spam policy covers “using automated tools or AI to churn out high volumes of similar content with minimal changes”. TikTok requires a label on realistic AI-generated content. Vary your topics, and check the first videos of any automated series.
A ShortFast one-minute stock-footage video uses about 24 credits and an AI art-style one about 37, so Starter's 2,000 credits, at $29 a month or $15 billed yearly, cover about 80 or 50 videos a month. Extra credits are $10 per 1,000. There's no free plan; every monthly plan starts with a 3-day trial for $1.
Short AI's Creation plans hold 1,600, 3,600 or 7,200 credits a month, which its pricing page puts at up to 40, 90 or 180 faceless videos. Its story, dialogue, Reddit and fake-text formats cost 20 credits per 30 seconds of video, so a one-minute Reddit story uses 40 credits; scheduling is priced separately. The two companies' credits don't convert, so price a video you'd actually publish on each.
FAQ
Keep going
A clipper for long videos you already have, against a pipeline that starts from a topic.
Learn moreComparisonAnother auto-posting generator with Reddit-story and fake-chat formats.
Learn moreGuideWhat each free tier really allows: watermarks, length, rights and posting.
Learn moreGuideEight tools compared on where the story comes from and whether they post for you.
Learn moreGuideEight tools that post one video to all three, compared on direct publishing and free plans.
Learn moreToolA topic turned into a faceless short.
Learn moreThree days of full access. If Short AI suits you better, that's a useful thing to find out cheaply.