BuiltWith and Wappalyzer both sell lead lists. TechSpy reads one company instead.
Both tools detect what a site runs and turn it into prospect lists at scale. They differ on price, free usage and how they meter lookups. If your job is understanding one account, neither list is the right shape, and that is where TechSpy fits.
- BuiltWith: free single-site lookups; paid plans from $295/mo with CRM integration on every plan
- Wappalyzer: free browser extension and 50 lookups a month; paid plans from $250/mo
- TechSpy: a per-domain read with DNS/DMARC and Deep Scan, free at 30 scans a day
Free — no card, 30 scans/day.
BuiltWith & Wappalyzer — the lists
TechSpy — the read · acme.io
HighVerdict
Vercel-hosted Next.js app with Segment-fed analytics and an unenforced DMARC policy: a product-led team that ships fast.
Evidence: Next.js runtime + Vercel headers; Segment and GA4 client-side; DMARC p=none from the DNS audit.
Implication: sell to product and growth, and lead with the email-security gap as the easy opener.
Choosing between BuiltWith and Wappalyzer starts with the list you need
BuiltWith advertises 18+ years of technology history across hundreds of millions of domains and CRM integration on every paid plan. Wappalyzer starts cheaper, includes a free extension, and meters paid plans in lookups and API credits (credits expire after 60 days). Both are built to find many companies that use a technology. When you need to understand one company before a call, a row in either list stops short.
What either list gives you
acme.io · uses Next.js, Segment
Enough to add the account to a sequence. Not enough to know what to say.
What the read gives you
- VerdictA product-led team on managed infra
- EvidenceNext.js/Vercel, Segment, DMARC p=none
- ImplicationsSell to growth; open with email security
BuiltWith vs Wappalyzer vs TechSpy
Prices and limits from each vendor's public pricing page (checked October 2026). The column that leads each row is bolded.
What only TechSpy does
The depth a lead database doesn't reach, turned into an action instead of a data dump.
🔍
Deep Scan reads the network tab
A headless browser plus HAR capture surfaces the hidden APIs, SDKs, and third-party calls that never appear in static HTML.
🛡️
Infrastructure, not just front-end tags
Every scan audits DNS, DMARC, SPF, DKIM, and maps subdomains, so you see how a company's email and infrastructure are configured and where the gaps are.
🧭
A read, not a raw list
Tools are grouped by what they mean and turned into a Verdict, Evidence, and Implications with High / Medium / Low confidence. When a site is blocked, it says so.
Pick BuiltWith or Wappalyzer if…
Different jobs. Pick the one that matches yours.
Choose BuiltWith or Wappalyzer if you need to
- Build large prospect lists filtered by the technology companies run (both).
- Use long technology history and CRM integration on every plan (BuiltWith).
- Start cheaper, use a free browser extension, and verify emails alongside lookups (Wappalyzer).
Choose TechSpy if you need to
- You research one company at a time and need a read you can act on, not a list row.
- You need DNS, DMARC, SPF, DKIM and subdomains in the same scan.
- The target is a React or Next.js SPA, or hides vendors behind interaction.
- You want to start free at 30 scans a day, with API, Zapier, MCP and CLI from $19/mo.
Start free — pay when it becomes a habit
Free
$0
- Scans: 30/day
- Deep Scan: —
- Interact: —
- Export PDF: —
- API · Zapier · MCP · CLI: —
Plus
$19/mo
- Scans: 30/day
- Deep Scan: 10
- Interact: 5
- Export PDF: —
- API · Zapier · MCP · CLI: ✓
Max
$49/mo
- Scans: Unlimited
- Deep Scan: 50
- Interact: 25
- Export PDF: ✓
- API · Zapier · MCP · CLI: ✓
Enterprise $199/mo. Static scan runs in seconds; Deep Scan & Interact take minutes.
Picked a list tool? Use TechSpy for the accounts that matter.
Scan a real target free — no login, 30 scans a day.