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

​
Voice

Per minute
Voice (all calls, inbound + outbound)$0.08
Voice is billed per second, rounded to the nearest second. A 1m23s call costs 83 × ($0.08 / 60) = $0.111.

​
What’s included in every minute

  • Real-time speech recognition
  • AI reasoning
  • Natural-sounding voice synthesis
  • Call recording (stored on Nixflex, plus original kept on your Twilio)
  • Post-call analysis (summary, sentiment, custom extraction)
  • Webhook delivery with automatic retries
  • Dashboard access and logs
There are no separate per-feature charges. Everything is in the per-minute price.

​
What’s not included

You pay these directly to your Twilio account (Bring Your Own Twilio):
CostWhere it’s billed
Phone numbersYour Twilio account
Voice minutes (carrier)Your Twilio account
SMS messagesYour Twilio account
Because you BYO Twilio, Nixflex doesn’t see or mark up these costs — you get Twilio’s wholesale rates directly.

​
SMS

Nixflex doesn’t charge for SMS. You pay Twilio directly at their standard rates for your region.

​
How billing works

1

Top up credit

Add credit to your account from the dashboard. Minimum top-up $20.
2

Calls and SMS deduct from credit

Each call deducts at the end. SMS deducts when sent.
3

Low balance alerts

Email when credit drops below your threshold (default $20).
4

Auto-top-up (optional)

Set a payment method to auto-top-up when balance falls below a threshold. Never run out mid-call.

​
Usage tracking

Check current usage anytime: 
curl https://api.nixflex.com/v1/usage \
  -H "Authorization: Bearer KEY_ID:KEY_SECRET"
Returns total minutes, calls, SMS, and credit balance.

​
Volume pricing

High-volume customers get custom pricing. Contact sales@nixflex.com for a quote.

​
Refunds

If a call fails due to a Nixflex error (not Twilio, not your endpoint), we credit it back automatically. You’ll see refunded entries in your usage logs. For billing questions, email support@nixflex.com.