Knockout API vs OBS AI Matting

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.

OBS AI Matting is a free, open-source Linux filter for OBS Studio that removes, blurs, or replaces webcam backgrounds in real time. It runs Robust Video Matting through ONNX Runtime and CUDA to create soft edges and stable cutouts. Transparent mode lets OBS image, video, or color sources appear behind the camera, while a built-in mode blurs the background. Auto light match can adjust exposure and white balance to follow a selected OBS background or scene. Controls include blur strength, brightness, gamma, matte hardness, and quality settings of 384, 512, or 720. The interface supports English and Spanish and follows OBS language settings. Requirements include OBS Studio 28 or later, ONNX Runtime with CUDA, an NVIDIA GPU with CUDA and cuDNN, CMake, and a C++17 compiler. A roughly 107 MB RVM model must be downloaded separately. CPU fallback exists if CUDA fails, though a GPU is recommended for real-time use.