numtrue

SMS agencies

Stop paying for undelivered text messages. Filter out landlines and dead numbers before you broadcast to protect your sender reputation.

Optimize delivery costs
Stop paying for dead numbers and invalid mobile handsets. Filter your lists to only reach active devices and improve your campaign ROI.
Protect sender reputation
Consistent high bounce rates trigger carrier filtering. Keeping your lists clean maintains your trust score and prevents messaging throttling.
Carrier-specific routing
Identify line types instantly. Don't waste budget by attempting SMS delivery to landlines or VOIP numbers.

$0.0064

starting per check

200+

countries covered

10 free

checks to start, no card needed

1 credit

per lookup, refunded if invalid or failed

The workflow

1

Upload the campaign list

Export your audience from your CRM or marketing automation tool and upload the CSV to Numtrue before you hit send.

2

Filter and separate

We run live network checks to strip out dead lines, landlines, and invalid formats. You get a clean list of reachable mobile numbers.

3

Broadcast safely

Import the verified mobile list back into Twilio, Klaviyo, or your preferred sender. Enjoy improved delivery rates and safe sender scores.

Sending a dead SMS costs money. Filtering it costs fractions.

High bounce rates trigger carrier filtering, causing your messages to be throttled or flagged as spam. Maintaining clean lists protects your carrier trust score and ensures consistent delivery throughput.

Clean your SMS list

No subscriptions. Credits never expire.