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AMDSure vs VM Hunter
VM Hunter is a hosted service that classifies the first two seconds after pickup into person, voicemail, IVR or screening, with an API and integrations for VICIdial, Asterisk, FreeSWITCH and Twilio. AMDSure runs VM Hunter's open lite acoustic model on your box as one of its inputs, under its MIT licence; the hosted product is a different thing.
| AMDSure | VM Hunter | |
|---|---|---|
| The 3% abandon rule | Shadow mode measures people wrongly sent to voicemail on your own calls, beside your built-in AMD(), with the sample size: your detector's share of the 3% abandon rate, before you switch. People are decided first, 2.55 s on average. | No published error rates. |
| How it decides | A compiled agent on your Asterisk box measures the call (a real voice detector, tones, a learned acoustic model, the sound of the pickup itself); AMDSure's server applies the rules and signs the verdict. | Audio sent to VM Hunter's servers; a speech model classifies the first two seconds. |
| Where the audio goes | Stays on your server. The agent sends numbers (speech probabilities, tone events, model scores), never audio, unless you switch learning on. | Leaves your server. Per its listing, audio recordings are retained for 30 days and user data is used for training. |
| Time to a verdict | Median 4.6 s to a verdict on live calls from the pickup, 2.3 s on recordings that start mid-greeting; short greetings decide at about 2 s, beeps and known greetings sooner. | Analyses the first two seconds; time to a verdict not published. |
| Price | Free: 50,000 verdicts a month, two servers, no card. Starter $69 a month for 500,000 then $0.0002; Growth $269 for 5,000,000 then $0.00012; Scale $899 for 25,000,000 then $0.00008. | Free 5,000 calls a month; Nano $100, Micro $200, Mini $300 a month with concurrency limits; $0.001 per call (third-party listing, October 2026; confirm with the vendor). |
| What it reports | Person, voicemail, call screener, unsure, each with a reason, a confidence and the time to the verdict. And what answered, by name: Verizon, AT&T and other carriers' default greetings, number read-outs, iPhone, Samsung and Google call screening, a disconnected number (the intercept tones), fax, busy, dead air, a false answer. Stamped on the call as AMDSURE_KIND for the dialer. | Person, voicemail, IVR, call screening prompt. |
| Works on | Asterisk 18 to 22 and everything built on it: VICIdial, ViciBox, FreePBX, Issabel, GoAutoDial, custom dialers. FreeSWITCH in development. | API; VICIdial, Asterisk, FreeSWITCH, Twilio. |
| Proof before you switch | Shadow mode runs beside your built-in AMD() on every call and stamps its verdict on the call; the dashboard shows people wrongly sent to voicemail and voicemails caught, against AMD(), before you switch. | None published. |
| When it fails | Open, to your own AMD(). A brain outage costs seconds, never a call. | Not published. |
| Your audio and training | Your call audio is used for training only with the learning checkbox on, which you can turn off at any time; phone numbers are never seen. | Per its listing, always. |
Where VM Hunter is good
Hosted AI detection with an API. Free tier, then monthly tiers.
- A generous free tier.
- A screening class.
Where AMDSure differs
- AMDSure keeps the audio on your server; VM Hunter keeps a copy for 30 days and trains on it.
- AMDSure's free plan is 50,000 verdicts a month against 5,000.
- AMDSure hears the pickup itself and keeps listening past two seconds when the first two are not enough.
Sources
Facts about VM Hunter come from its own documentation and pricing pages on the dates noted; tell us at [email protected] if something has changed and we will fix it. Other comparisons: Stock AMD(), FreeSWITCH AMD, AMDY, Twilio AMD, Telnyx AMD, Plivo, SignalWire AMD, Vonage.
See it on your own traffic.
A 20 minute call. We show the console with live numbers, then set up shadow mode on your dialer so you can judge for yourself.
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