Mystrika
WhatRuns is a free browser extension that instantly reveals the technologies powering any website, including web apps, CDNs, tracking tools, and plugins. It helps sales and marketing professionals perform competitive intelligence and tech stack discovery without sign-up.
WhatRuns is a lightweight, free browser extension that gives you instant visibility into the technologies behind any website. With over 450,000 active users, it has become a go-to tool for sales professionals, marketers, and developers who need quick competitive intelligence without the overhead of complex sign-ups or paid plans. The extension works with a single click, revealing web apps, hosting CDNs, tracking tools, WordPress plugins, and fonts used on any page.
The tool's core strength is its simplicity. After installing the Chrome extension, you just click the button and get a detailed breakdown of the site's tech stack. WhatRuns also monitors websites you follow and notifies you when they change technologies, making it useful for tracking competitor moves or industry trends. The database updates daily with 50 to 100 new technologies, so the detection stays current.
Pricing is straightforward: a free Starter tier covers basic features and email support, while a Professional tier at $12 per month adds advanced features, priority support, and API access. However, the FAQ on the site states there is no API available, so the Professional tier's API access may be a discrepancy or a planned feature. The free tier is fully functional for most users, and no sign-up is required to start using the extension.
WhatRuns is best for indie developers, startups, and SMBs that need a fast, no-cost way to research website technologies. It fits naturally into a sales prospecting workflow, helping reps identify potential leads based on the tools they use, or into a competitive analysis process for marketers. The tool is not designed for deep web analytics or managing campaigns, but it excels at its narrow focus.
For anyone who needs to quickly understand what powers a competitor's site or track technology shifts, WhatRuns delivers immediate value. The lack of a partner program and the ambiguity around API access are minor drawbacks, but the free, frictionless experience makes it an easy addition to any go-to-market toolkit. It is a practical, no-nonsense tool that does one thing well.
Features
- Identify technologies used on websites
- Show web apps and plugins
- Track visitor tracking methods
- Notify on technology changes
- Discover new web apps daily
- No sign-up required
Pricing
Pros
- Completely free to use with no sign-up required
- Instant technology detection with a single click
- Monitors websites for technology changes and sends notifications
- Updates daily with 50-100 new technologies
Cons
- No partner program mentioned
- Limited to browser extension; no deep web analytics or campaign management
Best For
Indie developers, startups, and SMBs who need quick, no-fuss competitive intelligence on website tech stacks.