GitHub CodeQL vs Superfeedr

GitHub CodeQL has no write-up on Specifiction yet; its figures are above.

Superfeedr is a feed API for applications that publish content, consume feeds or monitor topics. It handles RSS, Atom and JSON feeds and delivers updates through real-time notifications, webhooks and open protocols including PubSubHubbub and RSSCloud. Publishers can use hosted hubs to notify subscribers, export subscriber information and review analytics such as subscriber counts, subscription counts and time periods. Pro Hubs add a custom CNAME, landing page and subscription controls. Subscribers submit feed URLs and receive Atom or JSON data through webhooks. Trackers search across millions of feeds using included or excluded terms, exact or fuzzy matching and language filters. Superfeedr uses push and ping methods to detect changes, while high-frequency feeds may still be checked every minute. Hosted Hub costs nothing. Subscriber use is free for fewer than 10 feeds in a month, then pay as you go. Tracker costs $2 a month per tracking feed, and Pro Hub costs $200 a month.