Case study · B2B SaaS
B2B SaaS cut bad phone leads ~40% with OTP on lead forms
Published 7 June 2026 · Last updated: 7 June 2026
A sales ops team at a mid-market SaaS vendor replaced unverified Typeform callbacks with LeadFormHub OTP forms. Wrong numbers dropped sharply and connect rates rose within two weeks.
Results at a glance
| Metric | Before | After |
|---|---|---|
| Invalid / fake phone rate | ~40% of mobile leads | Near zero with OTP enabled |
| SDR dial-to-connect sentiment | Low (avoided phone queue) | Reps actively working leads |
| Time to first outbound | Manual sheet review | Instant notification + dashboard |
| Forms migrated | 3 unverified forms | 3 OTP-enabled hub forms |
The problem: paid traffic, unusable phone numbers
TechFlow's growth team ran LinkedIn and Google campaigns to a demo-request form. Roughly two in five mobile submissions were wrong numbers, duplicates, or obvious fakes. SDRs stopped trusting the queue and response times slipped.
Spreadsheet exports from their previous form stack had no verification step—reps burned an hour daily on dead dials.
The fix: OTP on high-intent forms only
They moved demo and callback forms to LeadFormHub, enabling OTP on phone fields while keeping a shorter newsletter form without OTP.
Branded hub links replaced generic form URLs on ads. Instant email alerts routed leads to the on-call SDR rotation.
Results after 14 days
Invalid phone submissions fell to a handful per week—mostly edge cases where SMS delivery failed. Managers reported higher rep morale on outbound blocks because connects felt predictable again.
The team kept Pro for OTP allowances and unlimited lead volume as Q3 campaigns scaled.
Ready to replicate these results? Start free on LeadFormHub or see pricing.
FAQ
- Did OTP reduce total form submissions?
- Submission volume dipped slightly on the demo form (~8%) but qualified connects rose—net pipeline improved because reps spent time on real prospects.
- How long did migration take?
- Three forms were rebuilt and ad URLs swapped in one working day; parallel running lasted a week for attribution comparison.
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