Skip to main content
Nixflex charges a flat $0.08 per minute of voice as the standard rate. No setup fees, no monthly minimums, no per-feature charges.

​
Voice

Voice is billed by duration, rounded to the nearest hundredth of a minute. For example, a 1m 23s call is about 1.38 minutes, so at $0.08/min it costs roughly 1.38 x $0.08 = $0.11.
$0.08/min is the standard rate. High-volume accounts can be set to a custom rate - contact sales@nixflex.com.

​
What is included in every minute

  • Real-time speech recognition
  • AI reasoning
  • Natural-sounding voice synthesis
  • Call recording (stored on Nixflex; the copy on your carrier is deleted automatically - see below)
  • Post-call analysis (summary, sentiment, custom extraction)
  • Webhook delivery with automatic retries
  • Dashboard access and logs
Everything above is included in the standard per-minute price. The only optional add-on is Live Monitor, which adds $0.01/min on inbound calls for numbers where you enable it.

​
Call recordings

When call recording is on, the engine saves the recording to Nixflex storage and then deletes the copy on your carrier automatically. This is deliberate: it avoids ongoing carrier storage charges and means your call audio is not retained there. Twilio charges for recording storage; Telnyx keeps recordings for up to a year. Either way, Nixflex holds the only copy after upload. You get your recording as a recording_url in the post-call webhook (and on the call record). To keep a recording long-term, download it and store it in your own backend - Nixflex hosts the file but does not keep it forever (see Data retention).

​
What you pay your carrier directly

Because you bring your own carrier, these costs go straight to your Twilio or Telnyx account - Nixflex never sees or marks them up:

​
SMS

Nixflex does not charge a separate per-SMS fee. SMS carrier costs are paid to your own carrier account at their standard rates for your region.

​
Web agent

The web agent adds chat and browser calls to your website. Pricing: Web calls bill at $0.09/min - the voice rate plus $0.01/min for the web-call infrastructure. Live Monitor is priced the same way: +$0.01/min while it is enabled on a number. Web chat messages deduct from the same credit balance as calls - free credit is used first.

​
How billing works

1

Top up credit

Add credit to your account from the dashboard. The minimum top-up is $5.
2

Calls deduct from your credit

Each call’s cost is deducted from your balance when the call ends.
3

Auto-top-up (optional)

Save a card and set an amount plus a threshold. When your balance falls below that threshold, Nixflex tops it up automatically so you never run out mid-call. You can also set a monthly cap on auto-top-ups.

​
Usage tracking

Check your current usage and balance anytime:

​
Volume pricing

High-volume customers can be set to a custom per-minute rate. Contact sales@nixflex.com for a quote. For billing questions, email support@nixflex.com.