Stop paying for
SMS fraud you never sent.
One HTTP call before you hand a message to Twilio, Vonage or MessageBird — Verifence answers allow/deny in single-digit milliseconds.
- A deny costs you $0. The message never reaches your provider, so it's never billed.
- Sub-10ms decisions. Fast enough to sit inside your signup flow without users noticing.
- Catches what your provider can't. Account rotation, farms and pumping — the attack the send path is blind to.
No card required. Four protection layers on the free plan.
# attacker rotates accounts behind one address { "phone": "+14155550123", "user_id": "u_88421", "client_ip": "203.0.113.9" }
↳ message never handed to your provider · never billed
The send is the attack
SMS pumping drives verification codes to numbers an attacker profits from. There's nothing to steal and no account to break into — every request looks like an ordinary signup. Most teams discover it the way it was discovered here: as a line item, weeks later.
Four layers, cheapest first
First rejection wins. Each layer catches what the ones before it structurally cannot.
Destination shape
Malformed numbers, impossible lengths, and premium-rate ranges that bill you per message. Free, no state.
Velocity
Rolling windows keyed on account, number, address and network at once — so rotating any single key never trips.
Network reputation
The one an attacker can't fake: did anyone ever type the code in? Real users complete. Farms never do.
Plan quota
Per-account monthly limits you control, metered in real time with a clear signal when it's time to scale.
Simple, volume-based pricing
Every plan runs all four layers. Pay for the volume you check, not the fraud you block.
Starter
$19/mo
$16/mo
$190 billed yearly
5,000 checks/mo
- 5,000 checks / month
- All four protection layers
- 3 API keys
- Configurable caps + IP allowlist
Pro
$79/mo
$66/mo
$790 billed yearly
25,000 checks/mo
- 25,000 checks / month
- All four protection layers
- Unlimited API keys
- Team members
Enterprise
Custom
Talk to us
Custom volume
- Custom volume
- SLA & priority support
- SSO & audit log
- Dedicated onboarding
Put a firewall in front of your SMS spend.
250 checks a month, free. Add a key and make your first call in minutes.
Get started free