Kurrent

Kurrent is KX21's SIP routing and call-tracking product. Bring your own Telnyx account: SIP and DID sources, number management, per-source rate limits, a blacklist plus validator-API chain and destination pre-ping, whitelist, call log, Kamailio logs, webhooks and API. Carriage, recording and transcription bill to your own carrier, storage and Groq accounts at wholesale with no markup. Send a current call-tracking invoice and KX21 prices the same traffic against it.

Best for: Call-tracking and inbound-call operators paying per-minute vendor markups

• SIP and DID call sources
• Number management
• Per-source rate limits (concurrent, invites/min, calls/sec)
• Blacklist, validator-API chain and destination pre-ping
• Call log and Kamailio logs
• Call recording to your own R2/S3 bucket
• Transcription on your own Groq key
• Webhooks and API

Priced at half the call-tracking invoice you already pay; $1,795/mo minimum spend. Carriage at cost on your own Telnyx account (from $0.0032/min inbound local, $0.005/min outbound, numbers from $1/mo).

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