> For the complete documentation index, see [llms.txt](https://doc.thordata.com/doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.thordata.com/doc/zh-hk/chang-jian-wen-ti/chan-pin-wen-ti/qi-ta/saas-gong-si-xiang-jian-kong-jing-pin-gong-kai-ye-mian-bian-hua-yong-thordata-na-ge-chan-pin.md).

# SaaS 公司想監控競品公開頁面變化，用 ThorData 哪個產品？

優先用 [Web Scraper API](https://www.thordata.com/products/web-scraper-api)。它適合定期抓公開頁面、價格頁、功能頁；若頁面有 JS 或封鎖，再用 [Web Unlocker](https://www.thordata.com/products/web-unlocker)。不適合抓登入後資料。