The best alternatives to Mentioned By are Notify, Mention, and WordHunt. If these 3 options don't work for you, we've listed a few more alternatives below.
Whenever your Startup gets mentioned on Twitter, Facebook, Instagram, Youtube, Google+, Blogs, Forums, News, Reddit, Medium, Hacker News and Product Hunt. Get Notified on Slack or HipChat.
F5Bot is a free service that emails you when your selected keywords are mentioned on Reddit, Hacker News, or Lobsters. Use it to monitor your brand, your projects, or just topics that you're interested in.
Get live updates about your brand from the web and social media. Explore how you can monitor the web with real-time monitoring, competitive analysis, influencer scouting, custom insights and automated reports.