Gecko Advisor vs BuiltWith
BuiltWith tells you what tech a site uses. Gecko Advisor tells you what that tech does to visitors.
Quick Comparison
| Feature | Gecko Advisor | BuiltWith |
|---|---|---|
| Focus | Privacy risk from technologies | Technology stack identification |
| Tracker detection | Deep privacy analysis per tracker | Lists technologies detected |
| Risk scoring | Privacy score 0-100 with evidence | No risk scoring |
| Cookie analysis | Full cookie audit (1st/3rd party, purpose) | Not available |
| Fingerprinting | Canvas, WebGL, audio detection | Not available |
| Security headers | CSP, HSTS, X-Frame-Options analysis | Not available |
| Pricing | Free scanner, API from $49/mo | Free limited, Pro from $295/mo |
| Use case | Vendor privacy risk assessment | Market research, lead generation |
Where BuiltWith Excels
BuiltWith is the industry standard for technology profiling. It identifies the full technology stack behind any website -- from content management systems and hosting providers to analytics tools, advertising platforms, and JavaScript frameworks.
- Market research -- Track technology adoption across millions of websites, identify market share by technology category, and monitor competitive technology choices
- Competitive intelligence -- See exactly what technology stack your competitors use, including A/B testing tools, email platforms, and payment processors
- Lead generation -- Build targeted prospect lists based on technology usage, such as “all websites using Shopify and Klaviyo in the US”
- Technology market share -- Comprehensive historical data on technology adoption trends, market penetration, and growth trajectories across the web
- Historical technology adoption -- Track when websites added or removed specific technologies, with archives going back years
If your goal is understanding what technologies a website uses for market research or sales prospecting, BuiltWith provides the deepest technology identification database available.
Where Gecko Advisor Excels
Gecko Advisor goes beyond identifying technologies to analyze their privacy impact. Rather than listing that a site uses Google Analytics, Gecko Advisor evaluates whether that tracker is configured in a privacy-respecting manner, what data it collects, and how it contributes to the overall privacy risk profile.
- Privacy compliance assessment -- Evaluate whether a vendor's technology choices create GDPR, CCPA, or ePrivacy compliance risks for your organization
- Tracker risk analysis -- Not just detection but classification: which trackers are advertising networks, which are analytics, and what privacy implications each carries
- Cookie audit with security attributes -- Analyze cookie purposes, lifetimes, and security flags (HttpOnly, Secure, SameSite) that BuiltWith does not evaluate
- Fingerprinting detection -- Identify advanced tracking techniques (canvas, WebGL, audio fingerprinting) that operate without cookies and bypass consent mechanisms
- Security header validation -- Assess CSP, HSTS, Referrer-Policy, and Permissions-Policy configuration that directly affects visitor privacy and security
- Evidence-based scoring -- A deterministic 0-100 privacy score with published methodology, showing exactly which findings contributed to the score
- Vendor due diligence -- Purpose-built for screening vendor domains before onboarding, with historical change tracking and stability scoring
Complementary Tools
BuiltWith and Gecko Advisor answer fundamentally different questions, and using both provides a more complete picture of vendor technology risk.
Step 1: Identify with BuiltWith
Use BuiltWith to catalog the technologies a vendor deploys. Identify their analytics platform, advertising network integrations, CMS, hosting provider, and third-party service dependencies.
Step 2: Assess risk with Gecko Advisor
Use Gecko Advisor to evaluate the privacy risk those technologies create for visitors. Understand which trackers are actively collecting data, whether fingerprinting is deployed, and how security headers protect (or fail to protect) user privacy.
Step 3: Monitor changes
BuiltWith tracks technology stack changes over time. Gecko Advisor tracks the privacy impact of those changes -- whether new technologies improved or degraded the vendor's privacy score, and whether tracker counts increased or decreased.
Together, you get both the “what” (BuiltWith) and the “so what” (Gecko Advisor) -- a complete view of vendor technology and its privacy implications.
Frequently Asked Questions
Does Gecko Advisor replace BuiltWith?
No. They serve different purposes. BuiltWith is a technology identification platform -- it tells you what tools and services a website uses. Gecko Advisor is a privacy risk assessment platform -- it tells you what privacy impact those tools have on visitors. If you need comprehensive technology stack profiling for market research or lead generation, BuiltWith is the right tool. If you need to assess privacy risk for vendor due diligence or compliance, Gecko Advisor is purpose-built for that.
Which is better for vendor screening?
For privacy-focused vendor screening, Gecko Advisor provides more actionable data. It gives you a privacy score, identifies specific risk factors (trackers, fingerprinting, missing security headers), and tracks changes over time. BuiltWith tells you what technologies a vendor uses but does not assess whether those technologies create privacy risk. For a complete vendor assessment, using both tools provides the most comprehensive view.
How does pricing compare?
BuiltWith offers limited free lookups with Pro plans starting at $295/month for full technology profiling and list building. Gecko Advisor provides a free scanner for individual domain assessments and a REST API starting at $49/month for programmatic privacy risk data. For teams that need privacy risk assessment rather than market research, Gecko Advisor offers a more focused and cost-effective solution.