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Free AI video generator? Here is exactly what's free on Sisif

You searched for a free AI video generator, so here is the straight answer: Sisif does not give away clips for free. There is no free tier, no trial credits and no watermarked free version. What you can do for free is sign up, describe your video, and see a storyboard of the shots before you pay anything. When you want the actual video, one 5-second clip costs $1, paid once, with no watermark and no subscription.

AI video generator with no watermark

What's free on Sisif

  • Creating an account. Signing up costs nothing. New accounts start with 0 credits.
  • Planning a storyboard. Write a longer brief and Sisif plans it into shots and shows you the storyboard before you pay. Planning does not spend credits; it is limited to 3 storyboards per 24 hours before your first purchase and 10 a day after.
  • Prompt help. The prompt box offers chips and options to shape your prompt before you buy. Using them costs nothing.
  • Seeing the price before you pay. A short prompt is one 5 s clip at $1. A timeline is a story, $1 per 5 s, priced before you pay.
  • Example clips. Watch real Sisif clips on this page and on example clips.

What costs $1 and why

  • One 5-second clip, 540x960, $1, paid once. EU/UK buyers may see VAT added at checkout.
  • A story (several shots, up to 60 s) costs $1 per 5 seconds of the length you choose.
  • What the $1 buys: an MP4 with no watermark, credits that never expire, and if a render fails the credits come back to your account automatically.
  • Why not free: rendering video runs on GPUs and costs real money every time. Rather than a free tier that stamps a watermark on the result, Sisif charges $1 for a clean file.
  • Refunds: terms say all payments are non-refundable unless otherwise stated. The credits for a failed render come back to your account.

Monthly plans exist for volume ($10 for 100 credits, $50 for 1000 credits, $200 for 5000 credits). See pricing.

A woman with her hair in a bun waves and smiles at the camera. A 5-second Sisif clip. This is what $1 buys, no watermark.
Make a 5-second clip — $1 Plan a storyboard free

How it works

  1. 01

    Describe your video, or animate a photo with AI.

    Sisif home screen with a box to describe your video
    Sisif home screen with a box to describe your video
    Uploading a photo to animate in Sisif
    Uploading a photo to animate in Sisif
  2. 02

    Shape it with a prompt chip.

    Choosing a prompt suggestion chip in Sisif before paying
    Choosing a prompt suggestion chip in Sisif before paying
  3. 03

    Sign up free.

    Free Sisif sign-up screen
    Free Sisif sign-up screen
  4. 04

    For a longer brief, review the storyboard — free.

  5. 05

    Pay $1 for a 5-second clip and download the MP4, no watermark.

    Sisif checkout showing one 5-second clip for $1
    Sisif checkout showing one 5-second clip for $1

Questions

Is Sisif free?

No. Sisif has no free tier and no trial credits. Signing up, using prompt suggestions and planning a storyboard are free; rendering a video costs $1 per 5-second clip, paid once.

Is there a free AI video generator with no watermark?

Sisif is not free, but it never adds a watermark: the $1 clip downloads as a clean MP4. Free tiers elsewhere often watermark output; check each tool's own pricing page for current terms.

AI video generator with no watermark

What do I get for $1?

One 5-second, 540x960 video clip with no watermark, paid once, no subscription. The credits never expire.

What happens if a render fails?

The credits return to your account automatically, so you can try another prompt.

Do I need a subscription?

No. Pay per clip. Monthly plans exist for people who render every day, but nothing forces you onto one.

Can I see what I'll get before paying?

For a longer brief, yes: Sisif shows a storyboard of the planned shots and the price before you pay. A single short clip is not previewed as video before purchase.