Knockout API vs NSS Background Remover Platform

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.

NSS Background Remover Platform is a free browser suite for removing backgrounds, editing images and video, and upscaling images. Image removal accepts PNG, JPG, WebP, AVIF, and HEIC files, handles batches of up to 100 images, and exports straight-alpha transparency. Video removal can isolate people or process other subjects frame by frame, producing transparent WebM or composited MP4 while keeping audio. Image tools include erase and restore brushes, a magic wand, edge refinement, background replacement, layers, and 3D mode. Video tools include scenes, object removal, grading, text overlays, layers, trimming, and export. The platform lists 40 free tools, 32 cinematic presets, four alpha-capable formats, and 66 help articles. Processing occurs inside the browser; NSS says files stay on the device and are not sent to its servers. No account, quota, watermark, or installation is required. Supported browsers include current listed versions of Chrome, Edge, Opera, Firefox, Safari, and iOS Safari. Limits include a 4096-pixel working side, 100 MB images, 500 MB videos, and duration caps.