Wappalyzer

Browser extension and cloud service that detects technologies used on websites. Provides technology insights, company leads, and email pattern discovery for sales and marketing teams.

The problem it solves: Instantly reveal the CMS, frameworks, and marketing tools any competitor's website uses while you browse it.

Freemium
4.7on G2 (55 reviews)
browser-extension
technology-detection
lead-generation
tech-stack
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Our verdict: Wappalyzer instead of SimilarWeb?

Switch if: B2B sales and lead-generation teams and developers who need to know exactly which tech stack, CMS, and tools a website runs, and to build prospect lists filtered by technology.

Don’t switch if: Anyone wanting website traffic, channels, keyword, ad, app, or audience data; Wappalyzer answers 'what technology' not 'how much traffic.'

Biggest caveat: Detection accuracy is unreliable, with documented cases of nearly 1,900 technologies falsely flagged on a single page and no way to tell a paying enterprise customer from a free branded-widget user, while the free tier is only ~50 lookups and paid plans start at $250/month for a small data sample.

Pricing Facts

Starting Price$250/mo

Monthly (Pro); 17% off annually

Free PlanYes

Free account: 50 lookups/month, 5 monitored sites

Free TrialNone

Price verified against official pricing page, 2026-07-11

Ratings Across the Web

G24.7(55)
Capterra4.9(12)
Trustpilot4.1(5)

Scores from public review platforms, checked 2026-07-12. We don't rate tools ourselves.

Does it replace SimilarWeb?

Wappalyzer measured against the six things people actually use SimilarWeb for.

Traffic estimates for any website
Channel breakdown (direct / referral / social / paid)
Keyword & search intelligence
Ad & creative intelligence
Mobile app intelligence
Audience demographics & interests

Features & Capabilities

Available Features

Browser Extension
Instant tech detection
Company Search
Find companies by technology
Email Pattern Discovery
Find contact emails
Bulk Lookup
Check multiple websites
API Access
API integration

Pros & Cons

Pros

Easy to use
Great browser extension
Practical for prospecting
Simple API

Cons

Less depth than BuiltWith
Limited historical data
Export limits

Best Use Cases

Technology identification
Competitive scanning
Lead enrichment
Market validation

Target Audience

developers
growth marketers
sales teams
researchers

What Real Users Complain About

Negative feedback found on public platforms — because every tool has trade-offs, and vendors won't show you these.

“it is expensive to pay credits for just a tiny sampling of the data”

Capterra (Madhusudan S.), 2023-02

“doesn't compare the version of the technology the website is using with the latest version”

Capterra (Niyati M.), 2022-07

“Wappalyzer utilises computer resources...may make browsing more difficult”

Capterra (Sanket T.), 2023-03

“At the time of writing, Wappalyzer detects a whopping 1,929 technologies for this single webpage.”

lab.julienverneaut.com blog ("Wappalyzer is unreliable")

Similar Tools & Alternatives

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SimilarTech

4.2 G2$199/mo

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