Messaging Assurance
Independent, real-device proof for OTP/SMS, A2P/10DLC and voice delivery.
The shared problem
You don't have end-to-end visibility of your own messaging flow (provider to carrier to phone), so you can't tell a provider failure from a carrier issue, or prove either one.
Compare
Which one do I need?
| Problem | Product | What it measures | Status | Link |
|---|---|---|---|---|
| You don't have end-to-end visibility of your own OTP/SMS flow (provider to carrier to phone). You… | Monitor OTP/SMS | Received / not observed | View → | |
| Buying the 3 products separately costs more and doesn't give a unified view of the customer's… | SMS Assurance | The union of what its 3 components measure… | View → | |
| Without independent verification you cannot tell whether a carrier filtered/blocked a message from whether your own… | A2P / 10DLC Delivery Verification | Received / not observed | View → | |
| Without independent verification you don't know if your calls to Latin America ring a real handset,… | Voice / Call Assurance | Call observed / not observed | View → | |
| You have no visibility into how your number actually appears on the recipient's phone (label, dialer,… | Spam Label Monitor | Device | View → |
What this family measures
- Received / not observed
- Observed latency (ms)
- Sender received
- Content integrity (masked — the OTP is never stored in clear)
- Timestamp
- SIM / corridor (country, carrier)
- Signed evidence (Ed25519 + JCS)
- The union of what its 3 components measure (see Monitor OTP/SMS, A2P/10DLC Delivery Verification, Spam Label Monitor). The bundle itself adds no metric of its own.
- Latency
- Observable sender/brand
- Content integrity
- URL presence (link accessibility evaluated separately)
- Signed evidence
- Call observed / not observed
- Caller ID received
- Visible name/label (if any)
- Observed Spam/Scam label
- Call log, duration/status
- Device
- OS
- Dialer
- Dialer version
- Incoming number
- Observed label
- Corridor
What it does not do
- SMS sending by Witnio — you send from your own system
- Anonymous receipt — every check requires an authorized senders list
- Root cause of a failure on your carrier side
- Content unrelated to the OTP
- Same as its 3 components — the bundle measures nothing its components do not measure separately.
- Root cause of a carrier filter/block without specific evidence — Witnio never claims a carrier "blocked" a message without that evidence
- The customer's own 10DLC registration/approval with the carrier
- Why a carrier applied a label — only what is observed gets recorded
- Audio quality / codec (out of scope for this product)
- Automatic attribution of the label to a specific carrier without specific evidence
- Why the label appeared — only that it appeared is recorded
Products
Services in this family
Monitor OTP/SMS
Check that your OTP/SMS reaches a real phone on an international number, and how long it took.
$189.00/mo
SMS Assurance
One contract, one dashboard: Monitor OTP/SMS, A2P/10DLC Delivery Verification and Spam Label Monitor together.
$399.00/mo
Indicative, from product sheet
A2P / 10DLC Delivery Verification
Independent, evidence-backed proof that your A2P/10DLC messages actually reached a real phone on a real carrier network.
$149.00/mo
Voice / Call Assurance
Verify your outbound calls to Latin America actually ring a real handset — caller ID and labels as received, signed evidence.
$149.00/mo
Spam Label Monitor
See exactly what a real phone shows when your number calls — device, dialer and label, as captured.
$129.00/mo
How it works
From your system to your evidence
FAQ
Frequently asked questions
It depends on the product: some sell separately and others exist as a recommended bundle -- see /pricing for the detail.