WhatRuns alternative

WhatRuns tells you what runs. TechSpy tells you what it means.

WhatRuns is a fast, free browser extension for a one-click glance at a site's tech. TechSpy scans deeper — through SPAs, into DNS and hidden APIs — and hands you a verdict, not a list to interpret yourself.

  • Sees through React and Next.js sites that leave extension scanners near-empty
  • Adds DNS/DMARC/SPF, subdomains, sitemap, Deep Scan, and monitoring
  • Groups tools by meaning and gives each finding High/Medium/Low confidence

Free — no card, 30 scans/day.

TechSpy — the read

High

Verdict

This is a modern React app on Vercel with Segment and HubSpot wired in — a product-led team instrumented for growth, not a legacy stack.

Evidence: Next.js served from Vercel edge, no server-rendered HTML for scrapers; Segment + HubSpot found in runtime requests, not the static page; DMARC set to p=none — email auth configured but not enforced.

Implications: Sell to the growth team, not IT. Lead with analytics and lifecycle fit, and note the email posture as an easy win.

Head to head

We're not pretending it's all checkmarks on our side — where WhatRunsgenuinely wins, it's bolded.

FeatureTechSpyWhatRuns
Free browser extension
One-click check while browsingWeb app scan
Sees through React/Next.js SPAsThins out
Output styleVerdict + evidenceRaw list
DNS / DMARC / SPF / DKIM audit
Subdomain discovery + sitemap
Deep Scan (headless + HAR hidden APIs)
Saved scans, compare, monitoring
Export PDF / Zapier / API
Confidence signals + says when blocked
Free tier30 scans/dayUnlimited

What only TechSpy does

The depth WhatRunsdoesn't reach — turned into an action, not a data dump.

🧬

Sees through the SPA

Static HTML, JS-runtime fingerprints, and HTTP headers combined — so React and Next.js sites that leave extension scanners near-empty still return a full stack.

🔍

Deep Scan finds the hidden layer

A headless run captures the HAR, surfacing the analytics SDKs, payment APIs, and third-party calls that only fire after the page loads. Interact clicks and fills to expose post-interaction tools.

🛰️

Infra, not just front-end

DNS, DMARC, SPF and DKIM posture, subdomain discovery, and sitemap coverage — the operational signals an extension never touches.

Pick WhatRuns instead if…

Straight up — different jobs. Pick the one that matches yours.

Choose WhatRuns if you need to

  • You want a free, no-signup extension that lives in your toolbar
  • You just need a quick glance at one site's front-end while browsing
  • You're checking a mostly static site where fingerprint-level detection is plenty

Choose TechSpy if you need to

  • You research React/Next.js SPAs where extensions come back nearly empty
  • You need a read — verdict, evidence, and implications — not a raw list to decode
  • You care about DNS/email posture, subdomains, and hidden APIs, not just visible tech
  • You want to save, compare, monitor, and export scans across a book of accounts

Start free — pay when it becomes a habit

Free

$0

  • Scans: 30/day
  • Deep Scan: —
  • Interact: —
  • Export · Zapier · API: —

Plus

$19/mo

  • Scans: 30/day
  • Deep Scan: 10
  • Interact: 5
  • Export · Zapier · API: —
Recommended

Max

$49/mo

  • Scans: Unlimited
  • Deep Scan: 50
  • Interact: 25
  • Export · Zapier · API: ✓

Enterprise $199/mo. Static scan runs in seconds; Deep Scan & Interact take minutes.

More comparisons

TechSpy vs BuiltWithTechSpy vs WappalyzerTechSpy vs TheirStackTechSpy vs SimilarTechTechSpy vs W3TechsTechSpy vs PublicWWW

Stop reading — scan one of your real targets

See the opinionated read for yourself. Free, no login, 30 scans a day.

View pricingAPI & Zapier