Background Eraser vs Knockout API

Background Eraser removes or replaces video backgrounds during recording or from imported footage, and removes photo backgrounds in one click. GPU-accelerated AI processes video and images on the device, without uploading footage; the app also works offline and requires no account. Video backgrounds can be replaced with colors, images, looping videos, blur or studio presets, with controls for feathering, smoothing, tightness and temporal smoothing. Video detection is designed for people in talking-head videos, presentations and tutorials. For photos, users can choose which detected subjects to keep. Videos export as MP4 H.264 at full, 1080p, 720p or 540p; photo cutouts export as PNG, including transparent PNG. Canvas presets include 9:16, 1:1, 4:5, 16:9 and other social formats. The free plan includes recording and editing, but adds a watermark to video and photo exports. Pro removes watermarks through weekly, monthly or yearly auto-renewing subscriptions; current prices are shown in the app.

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.