Knockout API vs PhotoKit Background Remover

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.

PhotoKit Background Remover removes image backgrounds in an online editor. Clicking an image can make its background transparent, and the cutout and magic eraser tools provide other ways to clear background pixels, including areas of continuous color. Shape clipping removes pixels outside a selected shape, and images can be saved as transparent PNG files. Replacement backgrounds are available, but batch processing is not. The editor also includes photo enhancement, portrait retouching, effects, collage creation, and crop, resize, rotate, and basic editing tools. PhotoKit offers a free online trial; its free plan is listed at free and has limited image downloads with ad support. The listed platforms are Android, API, extension, iOS, Linux, macOS, web, and Windows. The editor can be embedded in a website with an iframe, and integrations describe Google Drive and a Chrome extension. Commercial use is not included. The homepage says its server does not save user pictures and data; the privacy policy says personal data may be transferred to and stored in Hong Kong or another jurisdiction.