LetsEnhance vs Waifu2x-Extension-GUI

LetsEnhance is an AI image upscaler for JPG, PNG, and WebP files, with batch processing and API access. Users can enlarge images by 2x, 4x, 8x, or 16x, or choose custom dimensions; the service lists output up to 512 megapixels and support for reaching 300 DPI print resolution. Prime, Gentle, and Old Photo modes target different enhancement needs, and the listed capabilities also include face enhancement and old photo restoration. New users receive 10 free credits without a credit card, and processing one image uses one credit. Free inputs may be up to 24 megapixels or 50 MB, while free outputs are limited to 8 megapixels; free-plan images include a watermark. Paid plans remove the watermark. Starter costs $9 a month billed annually and includes 100 monthly credits. Unused credits roll over while a subscription is active, but expire when it ends; cancellation also ends unused credits and membership benefits at the billing period's end. The listed platform is API, and there is no desktop app. LetsEnhance is based in San Francisco, California.

Waifu2x-Extension-GUI is a portable Windows desktop application for enlarging images, animated media, and videos with AI super-resolution. It processes images, animated GIF, APNG, WebP, and video, supports batch jobs, and can enlarge up to 4x. Video frame interpolation is included for creating additional frames. Built-in super-resolution engines include Waifu2x, SRMD, RealSR, Real-ESRGAN, Real-CUGAN, Anime4K, ACNet, and RTX Super Resolution; interpolation options include RIFE, CAIN, DAIN, and IFRNet. The application supports AMD, Nvidia, and Intel GPUs, including multi-GPU processing for its built-in engines. Its portable workflow is to unzip the Windows x64 package and start it, with presets for one-click setting changes. Multithread controls and customizable settings support workflow automation. The project lists English, Simplified Chinese, Traditional Chinese, Japanese, and Spanish. It says no data is uploaded or collected and no server is used, though internet access checks updates and refreshes the donation QR code. Personal use is free; commercial use requires Patreon Premium from $4.99 a month.