If you're looking for a Microshot alternative, ScrapingBee is definitely worth a look. Although it's geared more for web scraping, it's got powerful screenshot abilities that let you render web pages with headless browsers. ScrapingBee can handle websites with heavy JavaScript content, and you can set screenshot sizes to whatever you need, so it's good for a variety of tasks.
Another option is LaunchBrightly, which is designed to generate automated product screenshots for help centers that stay fresh and consistent. It's got features like pixel-perfect screenshots, custom styling and multi-language support that could be useful for customer support teams trying to keep their knowledge bases up to date.
Last is WorkStreamer Guide, which generates user guides and training materials automatically. Although its core job is to generate guides, it can capture screenshots through a Chrome extension. That can be useful if you want to generate detailed documentation with screenshots that are integrated smoothly.
These alternatives offer a range of abilities that can help you with your screenshot needs, whether it's scraping websites, keeping product documentation up to date or generating user guides.