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No. 6 of 94 ·AI Background Removers

Knockout API

Web · API · paid plans from $0.02/mo

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Freedom report

Two barsScore 7.7

  • Free tierA free tier is on its own pricing page
  • Open codeNo open-source code on record
  • Runs widely1 of 6 device platforms
  • DocumentedPlans, terms and facts published

Knockout API provides image and video processing through a browser app and API. Its image tools cover background removal and replacement, batch processing, masking, smart crop, stickers, outlines, shadows and inpainting. The API also offers upscaling, portrait restoration, colorization and object removal. Video background removal runs asynchronously, with job polling to follow its progress. A browser-based Canvas supports layered designs with text and effects, and free-account users can save canvases and cutouts. Developers can connect using REST, any HTTP client, or official Node, React, Python and CLI options. The privacy policy says uploaded images are handled in GPU worker memory, are not retained after the response and are not used to train models. Free use includes 30 images per month and 60 requests per minute; paid tiers list a 600-request-per-minute limit and no monthly cap. The Free plan is 0.00 USD per free, Pay-as-you-go is 0.02 USD per month, and Knockout Plus is 10.00 USD per month. A Volume plan is listed without a price.

Who it is for

It suits developers and creators who need image or video processing through an API or browser Canvas. The listed audience ranges from evaluation and side projects to designers, agencies and production workloads.

What is good

  • Browser Canvas supports layered designs with text and effects.
  • Free account can save canvases and cutouts.
  • Image uploads are not used for model training.
  • Official Node, React, Python and CLI options are listed.
  • Video background removal supports asynchronous job polling.

What to know first

  • Free usage is limited to 30 images monthly.
  • Free usage is limited to 60 requests per minute.
  • Pay-as-you-go video removal costs $0.10 per output second.

Verdict

Knockout API combines a broad set of image tools with asynchronous video background removal and developer clients. Review the monthly image and request limits, and the listed plan prices, against your workload.

Knockout API plans and pricing

All plans
Free Free Recurring, with no expiring signup grant 30 images/month useknockout.com · 20 Sept 2026
Pay-as-you-go $0.02/mo Metered usage billed monthly All endpoints · PSD export available as an add-on · Video background removal at $0.10/output second · Email support useknockout.com · 20 Sept 2026
Knockout Plus $10/mo billed monthly 250 images/month included useknockout.com · 20 Sept 2026
Volume Not published 100k+ images per month useknockout.com · 20 Sept 2026
Volume Not published 100,000+ images/month useknockout.com · 20 Sept 2026
Free Free 30 images every month · no card · /remove, /remove-url, /mask, /compare, /preview · community support useknockout.com · 29 Sept 2026

Compared on AI background removers

Free plan
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