SimilarTech gives you a database. TechSpy gives you the answer.
SimilarTech is built to hand sales teams a technology database and prospecting lists at scale. Great when you're filtering millions of sites by tech.
But if your real job is understanding a handful of specific companies, a list isn't the answer — it's homework. TechSpy scans one domain and hands back an opinionated read: Verdict + Evidence + Implications, with confidence markers and infra signals SimilarTech never touches.
- SimilarTech output: a row of detected tech + market-share stats
- TechSpy output: what that stack means for this company, and what to do next
- Starting price: TechSpy Free is $0 — 30 scans/day, no credit card
Free — no card, 30 scans/day.
The core difference: raw data vs an actual read
Both tools detect a lot of tech. The gap is what you get back.
| SimilarTech | TechSpy | |
|---|---|---|
| What it answers | "What tech does this site use, and how common is it?" | "What does this stack mean for this company, and what should I do?" |
| Format | Database rows + lists | Grouped, interpreted analysis |
| Tools shown as | Flat list | Grouped by meaning (payments, analytics, infra…) |
| Certainty | Detected / not detected | High / Medium / Low confidence per finding |
| The takeaway | You do the interpreting | Verdict + Evidence + Implications, written for you |
If you're staring at a competitor, an acquisition target, or a prospect you actually care about, you don't need more rows. You need a call.
Head to head
Both columns win where they earn it. Pick by the job you're doing.
| Capability | TechSpy | SimilarTech |
|---|---|---|
| Per-domain opinionated analysis (Verdict/Evidence/Implications) | ✅ | — |
| Tech stack detection | ✅ | ✅ |
| Sees through React/Next.js SPAs | ✅ | ~ |
| DNS / DMARC / SPF / DKIM audit | ✅ | — |
| Subdomain discovery | ✅ | — |
| Deep Scan (headless render + HAR, hidden APIs/SDKs) | ✅ | — |
| Interact (LLM clicks/fills to surface post-interaction tools) | ✅ | — |
| Confidence markers + blocked-scan transparency | ✅ | — |
| Market-share & adoption trends | — | ✅ |
| Historical adoption database | — | ✅ |
| Bulk lead lists by technology | — | ✅ |
| Starting price | $0 | Sales-oriented plans |
Only the static scan returns in seconds. Deep Scan and Interact run a real browser and take minutes.
Signals a tech database doesn't surface
TechSpy reads more than the front-end stack. These are all real capabilities — and none are what a technology-tracking database like SimilarTech is built to do.
- DNS / DMARC / SPF / DKIM audit — spot a
p=noneDMARC record or missing SPF before it bites. Email-security posture at a glance. - Subdomain discovery — catch
staging.,api., or a new regional subdomain and see infra expansion before the press release. - Deep Scan (headless + HAR) — renders the page in a real browser and reads the network trace to surface hidden APIs and SDKs a static scrape never sees.
- Interact — an LLM clicks and fills real surfaces to trigger the tools that only load after a signup, checkout, or chat opens.
Sees through modern SPAs — and tells you when it can't
A basic scraper hits a React or Next.js app and gets a near-empty shell. TechSpy combines static HTML + JS-runtime fingerprints + HTTP headers to reconstruct the real stack behind the app.
And when a scan is blocked — Cloudflare, a bot wall, a missing sitemap — TechSpy says so and marks the finding, instead of faking a confident 100%.
- Multi-signal detection → the stack behind the SPA, not a blank page
- Confidence markers → High / Medium / Low on every finding
- Integrity over completeness → blocked scans are flagged, not hidden
Start free vs priced for sales teams
SimilarTech is packaged and priced for teams running bulk prospecting. TechSpy starts at zero and scales by how deep you go.
| Plan | Price | What you get |
|---|---|---|
| Free | $0 | 30 scans/day · DNS / sitemap / subdomains · save & compare |
| Plus | $19/mo | 10 Deep Scan + 5 Interact credits |
| Max | $49/mo | Unlimited scans · 50 Deep Scan + 25 Interact · Export PDF / Zapier / API |
| Enterprise | $199/mo | Higher volume + team needs |
No credit card to start. SimilarTech is quote- and sales-oriented — a different tool for a different budget and job.
When SimilarTech is the better pick
Straight up — if this is your job, SimilarTech is the right tool and TechSpy isn't pretending otherwise:
- You need bulk prospecting lists filtered by the technologies companies use
- You want market-share and adoption-trend reports across millions of sites
- You need long-run historical data on who adopted or dropped a technology over time
- You're a sales team feeding a pipeline, not evaluating a few specific companies
TechSpy is built for the opposite job: going deep on the handful of domains you actually need to decide on.
Scan one of the companies you're evaluating — right now
You've got a specific domain in mind. Drop it in and get a real read in seconds — Verdict, Evidence, Implications, and the tech grouped so it means something.
- Free forever plan · 30 scans/day
- No credit card
- Save and compare later
Scan a domain free
See the opinionated read for yourself — no login, 30 scans/day.