Knockout API vs UniFab Video Background Remover AI

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.

UniFab Video Background Remover AI separates people or objects from video surroundings without a green screen or frame-by-frame masking. Its AI matting analyzes frames for fine edges, hair, and motion. The maker says it handles messy hair, fast movement, motion blur, and busy backgrounds while retaining visible edge detail. After removal, users can choose preset background colors, including green-screen colors for later editor workflows, or blur the background. Foreground isolation and exports up to 4K are supported, and exported cutouts have no watermark. The documented workflow is to open UniFab, choose Background Remover, import a video, select a background color, set output preferences, and start processing. The completely free plan includes guided removal, customizable colors, and watermark-free output. It runs on Windows and macOS. UniFab launched in 2022 and lists Background Remover AI as an August 2024 milestone.