Find and verify professional email addresses instantly — the go-to prospecting tool for sales and outreach.
What the signals say about Hunter.io
Hunter.io holds a HookFlow heat score of 29/100 in AI Sales & Outreach, currently showing early-stage momentum building from a low base. Over the last 7 days its score moved +24 points (up), +24 over 30 days. On the Lock-In Index it scores 100/100 (high lock-in, with significant switching cost).
Heat Score
0–100 viral momentum index combining social buzz, search trends & growth velocity
29
14-day trend
0
24h
+24
7d
Heat Score Breakdown
Creator Buzz (30%)5
Search Interest (25%)5
Community Discussion (20%)5
Growth Momentum (25%)100
Forecast
Stable
low confidence
Now
29
→
+7 days
9
→
+14 days
9
A.R.C. Score
A.R.C. ratings are calculated for developer infrastructure and API-first tools. This tool hasn't been evaluated yet or falls outside the A.R.C. scope.
🔓Data Lock-In Index
100/ 100
Lower = more portable. 0 = fully open, 100 = maximum lock-in.
✗ Webhooks Out✗ Bulk Export✗ Open Formats
Pricing
freemium
Best For
Teams & Solo
Compare Hunter.io vs…
Deep-Dive Audit ReportFree
GitHub health score, founder track record, full A.R.C. breakdown, category peer comparison, and 14-day score forecast — in one printable report.
View Full Audit Report