SimilarTech maps the market. TechSpy reads one company cold.
SimilarTech is a database of who-uses-what across millions of sites. TechSpy points a scanner at a single domain and hands back an opinionated read — what they run, how it's wired, and what it means.
- Deep Scan opens the network tab: hidden APIs, SDKs, and vendors a static crawl never sees
- Full DNS, DMARC, SPF, DKIM, and subdomain audit — infrastructure, not just front-end tags
- A Verdict with Evidence and Implications, each marked High / Medium / Low confidence
Free — no card, 30 scans/day.
SimilarTech — the market map
TechSpy — the read · acme.io
HighVerdict
A modern SPA team that ships fast on managed infra — but the email domain is unprotected.
Evidence: Next.js + Vercel via runtime fingerprints; Segment and a first-party analytics endpoint only under Deep Scan; DMARC missing.
Implication: engineering-led and well funded, but security review lags growth — a wedge for a security or infra vendor.
Market share tells you the category, not the account
SimilarTech is built to answer “who uses this technology, and how is adoption trending?” That's the right tool for sizing a market. But when you need to understand one named company before a call, an adoption chart can't tell you how their stack is wired or where the gaps are. TechSpy starts there.
What a market database gives you
acme.io · appears in “Next.js users” · “Segment users”
Enough to put it on a list. Not enough to know what to say.
What the read gives you
- VerdictA fast-shipping SPA team with an unprotected email domain
- EvidenceNext.js/Vercel, Deep-Scan-only analytics, DMARC missing
- ImplicationsSecurity review lags growth — open with that
Head to head
Not all checkmarks on our side — market-share trends and bulk lead lists are SimilarTech's home turf, bolded below.
What only TechSpy does
The depth a market database doesn't reach — turned into an action, not 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. This is where the vendors nobody advertises show up.
🛡️
Infrastructure, not just front-end tags
Every scan audits DNS, DMARC, SPF, DKIM, and maps subdomains. You see how a company's email and infrastructure are actually configured — and where the holes are.
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A read, not a raw list
Tools are grouped by what they mean, then turned into a Verdict, Evidence, and Implications with High / Medium / Low confidence. When a site is blocked, it says so instead of faking a number.
Pick SimilarTech instead if…
Different jobs. Pick the one that matches yours.
Choose SimilarTech if you need to
- You need historical market-share and adoption trends across a whole technology category.
- You're building bulk prospecting lists — thousands of companies filtered by the tech they run.
- Your workflow is top-of-funnel lead gen, not deep analysis of a specific account.
Choose TechSpy if you need to
- You're researching one company at a time and want a read you can act on, not a tag dump.
- You need infrastructure signals — DNS, DMARC, subdomains — that a tech database doesn't track.
- You're chasing vendors and APIs hidden behind a SPA or only visible after interaction.
- You want to start free: 30 scans a day, DNS, sitemap, subdomains, plus save and compare.
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.
Know the market? Now read the company in front of you.
Scan a real target free — no login, 30 scans a day.