Knockout API vs Pixian.AI
Knockout API
useknockout.com
Pixian.AI
pixian.aiSide by side
| Figure | Knockout API | Pixian.AI |
|---|---|---|
| Price from | $0.02/mo | $5/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 7 | 10 |
| Spec score · AI Background Removers | 8.5 (#19) | 8.9 (#7) |
| Spec score · Background removers | 8.5 (#16) | 8.9 (#10) |
| Free plan | Yes | Yes |
| Integrations | Official client options include Node, React, Python, and CLI, alongside REST and any HTTP client. | The web app links processed images to Recompressor, VectorMagic, Vectorizer.AI, ClippingMagic and PixSpy workflows. |
| Purpose | Knockout provides image and video processing tools through a browser app and API. | Pixian.AI is a website for automatically removing backgrounds from images. |
| Security | The privacy policy says API tokens are SHA-256 hashed, passwords are managed by Supabase Auth using bcrypt, and traffic is encrypted via TLS. | API requests must use HTTPS and HTTP Basic authentication with the API ID as username and API Secret as password. |
| Support | The site lists community support for Free, email support for Pay-as-you-go, and Slack support for Volume. | Support is provided through an email form, and staff currently communicate in English with machine translation for other languages. |
Plans
Knockout API
- FreeFree
- Pay-as-you-go$0.02 a month
- Knockout Plus$10 a month
- FreeFree
- Pay-as-you-go$0.02 a month
- Knockout Plus$10 a month
- VolumePriced on request
Pixian.AI
- FreeFree
- PAYGO - 250 credits$5 a month
- PAYGO 250 credits$5, paid once
- PAYGO 500 credits$9.50, paid once
- PAYGO 1,000 credits$18.60, paid once
- PAYGO 2,500 credits$45, paid once
- PAYGO 5,000 credits$85, paid once
- PAYGO 10,000 credits$166, paid once
- PAYGO 25,000 credits$400, paid once
- PAYGOPrice not published
In their own words
Knockout API
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 handles upscaling, portrait restoration, colorization, and object removal. Video background removal runs asynchronously, with job polling for progress. The browser Canvas supports layered designs with text and effects, and users can save canvases and cutouts to a free account. Developers can connect through REST, any HTTP client, or official Node, React, Python, and CLI options. The service says it manages GPU processing, endpoint updates, usage records, credentials, teams, and billing. Its privacy policy says uploaded images are processed in GPU worker memory, not retained after the response, and not used to train models. The Free plan is free, with 30 images per month and 60 requests per minute. Pay-as-you-go is $0.02 a month, with metered usage billed monthly; Plus is $10 a month. Paid tiers have no monthly cap and a 600-request-per-minute limit.
Pixian.AI
Pixian.AI is a web service and API that removes image backgrounds automatically. Its servers analyze uploaded images with GPUs and multi-core CPUs, then return transparent PNG files or opaque JPEG and PNG files. Inputs can be JPEG, PNG, BMP, GIF, or WebP. Batch processing and API access are available, with example clients for cURL, Java,.NET, Node.js, PHP, Python, and Ruby. The site describes support for many image types, including people, objects, artwork, logos, and scans. Free website images are limited to 250,000 pixels; paid images can reach 25 megapixels, with a 30-megabyte file limit. The Free plan costs nothing and is website-only with low-priority processing. A PAYGO 250-credit plan costs $5 a month for website and API use. API testing is free, while production results require credits.