Kurrent · Route
Save 50%off your existing bill
50% off your current call tracking bill, minimum $1,795 a month. Carrier minutes at cost on your own account.
Call tracking. You pay the phone company directly.
Running a call center? See how Kurrent fits with lead recording, lead routing, call screening and e-sign on one stack.
Kurrent, explained in 73 seconds.
The problem, the fix, and the numbers. Then let's talk about what you'd save.
What it costs
50% off the call tracking bill you pay today, minimum $1,795 a month. Your minutes move to your own Telnyx account, at Telnyx’s price, and we take nothing on them.
| Software | half your current call-tracking bill, flat |
| Inbound minute — local number | as low as $0.0032 · your own Telnyx, at cost — requires Telnyx minimum spend |
| Inbound minute — toll-free | $0.015 |
| Outbound minute | $0.005 |
| Local number | from $1.00/mo · as low as $0.25 at volume · on Telnyx or your own carrier, at cost |
Screen the call before it rings.
Every inbound number runs your own checks before a target hears it. There is no markup per lookup, because the APIs are yours. Blacklist first. Then your validator chain. Then a pre-ping to the destination. Anything that fails runs the action you set instead of connecting the call.
| Stage | What runs | On failure |
|---|---|---|
| Blacklist | The FROM number is checked against your external API — litigator lists, DNC, your own suppression file | The configured action runs instead of the route |
| Validator APIs | A chain of external checks that runs after the blacklist — carrier/line-type dip, consent lookup, fraud score, anything with an HTTP endpoint. Every validator must pass (AND) | The first failure triggers the global action |
| Pre-ping | Ask the destination whether it will take this call, before the caller is connected — accept, reject or route elsewhere on the answer | Falls through to the next target in the ring tree |
Your keys, your vendors. Each check runs on your own API contract. KX21 runs the chain and never marks up a lookup. It is the same model as the rest of the platform.
What it does
Your own Telnyx
Connect your Telnyx account to sync phone numbers and place orders. The carrier bill stays yours.
SIP & DID sources
SIP users and phone numbers that can take traffic, each routed to its own target.
Number management
Buy and set up DIDs on your Telnyx account. Map each one to the source that should answer.
Call log
Every attempt, with from, to, status, length and ring time, tied to its source.
Logs & Kamailio
App logs plus raw SIP proxy logs. Enough to debug a route from end to end.
Webhooks & API
Webhooks, API keys and team access. Edge Snapshot saves the config as it was.
Validator API chain
Chain as many outside checks as you like, one per source. Each uses your vendor and your key. All must pass, and the first failure runs your action.
Pre-ping before transfer
Ask the destination if it wants the call before you connect it. Then route on the answer. No dead transfers, and no wasted buyer capacity.
Routing is where inbound rules get enforced. Check the caller in the IVR before an agent picks up. Run litigation scrubs. Look at carrier dips. Kill a bad DID the moment it shows. Our Contact.IO talk covers the whole stack: building a compliant TCPA process.
See inside Kurrent
See every call
Total calls, answer rate and the calls in progress right now.
Check the caller before the phone rings
Each number is checked on your own account. Blocked callers never reach your team.
Send each number where you want it
A phone number, a Komms AI agent or a call center line, by priority and weight.
Send every call to KontrolX
Choose when: as the call starts, when it is answered, or when it ends.
Everything included
One monthly fee covers all of it. Telnyx bills you directly for minutes and numbers, at their price.
Carrier and numbers
- Runs on your own Telnyx account, or bring your own carrier
- Syncs your numbers and orders new ones
- SIP trunks
- Recordings saved to your own R2 or S3 bucket
- Transcription on your own Groq or Deepgram key
Sources
- Every SIP line and phone number is a source with its own routing
- Sign-in by digest, IP or token
- Limits for each source: calls at once, calls per second, SIP invites per minute
- Whitelist that sends each number to a phone, a Komms agent or a SIP trunk
- Recording and webhooks set per source
Screening before the call rings
- Your blacklist first
- Then any checks you choose: line type, consent, fraud score
- Then a pre-ping asks the buyer if it wants the call
- A fallback action when a check fails
- Your own vendor keys, with no markup
Visibility and hookups
- Call log
- Raw SIP logs to trace any call end to end
- Webhooks for call events as they happen
- Full API
- Connects to KontrolX, so calls sit next to your leads
We set Kurrent up with you. It runs on a Telnyx account of your own.
What call tracking costs you
Most call tracking tools bundle the software and the phone company into one per-minute price. So a fair test counts the phone company on both sides. Kurrent is one monthly fee. Telnyx bills you directly for the minutes, at their price, and we take nothing on them. See Kurrent priced against Ringba that way, line by line, or against TrackDrive's eleven separate charges.
Your minutes, both ways
Nothing is sent to us. The numbers stay in your browser.
Questions
What is Kurrent?
Kurrent is call tracking and SIP routing that runs on your own carrier account: Telnyx, or bring your own carrier. Every SIP user and phone number becomes a source you can route, rate-limit, screen and log, with a call log, SIP logs, webhooks and an API. The minutes and numbers are billed to you by the carrier at its own rates.
How much does Kurrent cost?
50% off the call tracking bill you pay today, minimum $1,795 a month, as one monthly fee, so your total call tracking cost drops by about half. The minimum is $1,795 a month. You pay the phone company for your minutes and numbers directly, at their price. On Telnyx that is: calls to a local number from $0.0032 a minute, toll-free from $0.015, outbound from $0.005, local numbers from $1.00 a month, and call recording at $0.002 a minute.
Do I need my own Telnyx account?
You need your own carrier account. Telnyx is the default: connect it once and Kurrent syncs your numbers and can place orders for new ones. You can also bring your own carrier. Either way the carrier bills you directly for minutes and numbers; KX21 never sees that invoice and takes nothing on it.
Does Kurrent mark up minutes or numbers?
No. We charge nothing per minute and add nothing to a single minute or number. The only thing you pay KX21 is the monthly software fee.
How does Kurrent screen a call before it rings?
In order: the caller's number is checked against your blacklist API, then a chain of validator APIs you choose, such as a line-type dip, consent lookup or fraud score, every one of which must pass, then a pre-ping asks the destination whether it will take the call. Any failure runs the action you configured instead of connecting the call. Each check uses your own API contract and is never marked up.
What limits can I set per source?
Concurrent calls, SIP invites per minute and calls per second, each set per source. A whitelist can restrict which destination numbers a source may reach.
Can I get call events in real time?
Yes. Subscribe a webhook to call events and they arrive at your endpoint as they happen. The call log and the SIP-level logs are also available in the console and over the API.
How does Kurrent compare to Ringba or TrackDrive?
Ringba lists $147 and $297 plans, plus $0.05 to $0.055 a minute and $2 to $4 a number. TrackDrive lists eleven separate per-use charges across six plans. Kurrent charges none of those: one monthly fee, and you pay the phone company for minutes directly, at their price. The comparison pages price both line by line.
Do I have to send my call-tracking bill?
No. Tell us roughly what you pay and how many minutes you use, and we will price the same calls on Kurrent with your minutes on Telnyx at their price. If you want it line by line, share the invoice: we split it into phone company and software, check that it adds up, and price it. Most bills come back at half or less. If yours does not, we say so.