Question: I need a service that allows me to create high-quality, unique portraits for commercial use without a subscription.

If you need a service to generate high-quality, unique portraits for commercial use without a subscription, AutoPortrait is a good option. For $5, you can get 100 high-resolution portraits, 512x512px, from a handful of selfies. It's easy to use and permits commercial use, with no hidden fees or subscription requirements, so it's easy to get up and running.

Another option is Kahma, which generates high-resolution 8K portraits and headshots. Although it requires at least five source images, Kahma employs the latest AI technology to generate photorealistic and expressive portraits that convey personality and style. It's for all skill levels and protects data privacy with on-site processing and deletion of uploaded data after processing.

Enhance AI is a general-purpose tool that turns text prompts into realistic images and can also upscale existing images to meet commercial use requirements. With a variety of pricing tiers, it offers a range of options, including image upscaling and custom styles, so it's good for people who want to automate their image creation and editing workflow.

Last is BetterPic, which generates professional headshots in 4K resolution from selfies and other casual photos. With its intuitive interface and range of styles, it uses built-in face-matching protocols to ensure natural results. BetterPic's tiered pricing plans are designed for different needs, so it's a good option for people who want to generate high-quality portraits for things like website showcases and business cards.