Question: I'm looking for a tool that alerts customers when they're on a fake site and blocks them from entering sensitive information.

One good one is Memcyco. Memcyco can detect reconnaissance attempts and fake site launches in real time to help online brands maintain digital trust and security. It offers features like customer red alerts on fake sites, decoy credentials to thwart fraudsters, and a forge-proof watermark to verify sites. It's designed to give you immediate visibility into attacks so you can respond accordingly and keep users safer.

Another good one is SecuryBrowse. SecuryBrowse warns you about potentially risky websites and keywords before you click on them, educating you about risks and teaching you how to spot phishing and other malicious content. It also has features like site ownership checks, privacy controls and contextual alerts to help you browse more safely. SecuryBrowse works on Chrome and Chromium Edge browsers, and it blocks you from entering sensitive information on fake sites.

Another option is Netcraft, which offers external threat intelligence and digital risk protection to help you protect against phishing, scams, fraud and other attacks. Netcraft's 24/7 monitoring uses AI, machine learning and human expertise to spot potential threats and take them down as soon as they're validated. It offers actionable threat intelligence so you can take action to protect your customers from fraud.

If you're looking for something more geared toward shopping, Fakespot uses AI engines to detect and warn consumers about scams, fake reviews and counterfeits. It's available as a Chrome extension, Firefox add-on and mobile app. Fakespot can help you make better purchasing decisions by detecting and warning you about fraudulent activity on marketplaces like Amazon and eBay. It can help you avoid scams and have a safer online shopping experience.