Free tools and guides
Twilio pricing calculator and Telnyx cost comparison
Plan the carrier charges for a US browser dialer. Change your team size and calling assumptions to see the phone leg, browser leg, numbers, recording and storage. The page uses public sources and shows what each estimate leaves out.
Last reviewed: . Free to use. No signup required.
Estimate your monthly carrier charges
Waiting, voicemail and storage assumptions
Count these separately from human answers, even when drops are off.
Include the greeting, detection and message, if used.
The per-call browser leg stays connected during this wait.
Storage budget for this many months of recordings, held all month.
Conference mode bills the agent's full session, including waits.
Monthly carrier charge breakdown
USD. These are planning figures for the listed charges. Taxes, surcharges and other exclusions below are extra.
Twilio
$142.50 a month
Listed-charge estimate
Telnyx
From $77.00 a month
Starting-rate budget; verify full bill
Monthly charges by component, on one scale. The breakdown table lists every amount.
| Charge | Twilio | Telnyx |
|---|---|---|
| Outbound phone minutes | $70.005,000 minutes | From $25.005,000 minutes |
| Voice API / TeXML fee | $0.005,000 minutes | $10.005,000 minutes |
| Browser / agent leg | $52.0013,000 minutes | $26.0013,000 minutes |
| Local phone numbers | $11.5010 numbers | $10.0010 numbers |
| Call recording | $7.503,000 minutes | $6.003,000 minutes |
| Recording storage | $1.503,000 minutes | $0.003,000 minutes |
| Conference participants | $0.000 minutes | $0.000 minutes |
| Answering machine detection | $0.000 calls | $0.000 calls |
| Modeled charges | $142.50Listed-charge estimate | From $77.00Starting-rate budget; verify full bill |
10,000 dials, 1,000 human answers and 2,000 other answers. 5,000 rounded phone minutes and 13,000 rounded browser minutes.
Telnyx publishes a starting SIP rate. Its exact destination rate and any extra API charges for your call design need verification. A full Telnyx total is unavailable. No carrier savings percentage is calculated.
The example inputs are assumptions. They are not Redialler usage data or industry averages. The calculator sends no input to a carrier.
- Twilio
- $142.50/mo
- Telnyx
- From $77.00/mo
Public US rates and sources
Rates checked on . Twilio labels its rate cards as current in August 2026. Telnyx does not give a rate-effective date on these pages. All rates below are USD list rates. Confirm your contract and destinations before you spend.
| Charge | Twilio | Telnyx |
|---|---|---|
| US local outbound phone leg | $0.0140 / minute US local outbound list rate. Alaska is $0.0945/minute and is outside this model. | From $0.0050; exact rate needs verification / minute Published US local SIP rate starts at $0.005/minute. The exact destination/account rate needs verification; it is not a flat nationwide quote. |
| Additional outbound API fee | $0.00 / minute Included in the Programmable Voice outbound rate; no separate platform fee is added here. | $0.0020 / minute Voice API or TeXML fee on outbound prospect minutes, added to SIP charges. Other architecture-specific API legs need account verification. |
| Browser / app leg | $0.0040 / minute Separate browser/app call leg, including its connected waiting time. | $0.0020 / minute Published browser/app feature charge. This model does not assume it covers other architecture-specific API charges. |
| US local number | $1.15 / number/month US local number. Toll-free numbers and emergency calling are outside this model. | $1.00 / number/month Public US local base rate; SMS/MMS capability add-ons and volume discounts are excluded. |
| Recording | $0.0025 / minute One recording of each human conversation. The model rounds each conversation up to a minute. | $0.0020 / minute One recording of each human conversation; minute rounding is a planning assumption for this feature. |
| Recording storage | $0.0005 / recorded minute/month Gross storage budget before account-level allowances or volume discounts; assumes the modeled inventory is stored all month. | $0.00 / recorded minute/month The public Voice API rate card explicitly lists call recording storage at $0/minute. This is not an unlimited-retention promise. |
| Conference participant | $0.0018 / participant minute US-region conference participant rate, charged in addition to voice legs. | $0.0020 / participant minute Feature charge per participant, per minute, in addition to voice connectivity. |
| Standard answering machine detection | $0.0075 / call If automated drops are enabled, the model runs answering machine detection on every dial. | $0.0020 / call Standard answering machine detection. Premium detection is excluded. The model applies standard detection to every dial when drops are enabled. |
How the estimate works
Count the call legs
Dials = reps × dials per rep per day × working days. Human and voicemail percentages apply to all dials. The remaining calls are assumed to stay unanswered. Each modeled call uses the same duration within its group.
Phone minutes include human conversations and other answered calls. Other-answer time includes voicemail greetings, detection and playback when used. Truly unanswered prospect legs contribute no phone minutes. This is a planning assumption; your call records determine actual charges.
Per-call mode keeps the browser connection open during ringing and the answer. Conference mode bills one prejoined rep session per day, plus a prospect participant for each human conversation. Voicemail stays outside the conference. Parallel calls that answer and are then canceled, transfers, supervisors and extra legs are outside this model.
Account for rounding and retention
Twilio documents separate voice and client usage with minute rounding. Telnyx documents 60/60 increments. The calculator rounds each modeled voice leg up before multiplying by call count. An average duration alone cannot reproduce a real mixture of short and long calls.
Recording is limited to human conversations. The model rounds each recorded conversation to a minute, assumes recording pauses during conference waits, and applies that same conservative planning rule to both providers. Verify feature-specific rounding on your bill. It does not record voicemail.
Storage budget = monthly recorded minutes × retained months × storage rate. It assumes that inventory stays stored for the whole month. Twilio account allowances, average inventory changes, deletion timing and volume discounts are excluded. Telnyx lists storage at $0; confirm retention terms separately.
Excluded: tax, carrier and regulatory surcharges, Alaska and international destinations, inbound calls, toll-free numbers, emergency calling, SMS, branded caller ID, transcription, media streams, premium detection, extra API legs, CPS capacity and short-duration-call surcharges. Automated voicemail drops assume standard answering machine detection on every dial; a different design changes the bill.
Build a dialer or buy one?
A carrier API gives you control of your call design, number inventory and billing. A custom dialer also needs browser audio, session state, call queues, webhook validation, retries, consent handling, CRM writes, recording retention and support. Budget engineering and maintenance separately from carrier usage.
An existing dialer can reduce the work your team owns. Check its CRM fit, carrier model, pricing, call controls and compliance features. The right choice depends on your requirements and the time you can maintain a calling system.
See Redialler for Attio or see how Redialler handles calling. This calculator estimates carrier components; it does not change or quote Redialler’s seat pricing.
Frequently asked questions
Does this include the browser call leg?
Yes. A browser dialer uses a separate agent connection. Per-call mode includes assumed ringing time and rounds each leg separately. Conference mode includes the rep's full daily session and participant charges.
Is Telnyx's $0.002 rate the full outbound price?
No. Telnyx lists a Voice API or TeXML fee plus a separate SIP trunking charge. Its US local SIP rate starts at $0.005 per minute. Verify your destination and account rates before budgeting a full bill.
Do unanswered calls cost money?
This model assigns no prospect voice minutes to a truly unanswered call. A voicemail, IVR or other answered connection is billable and is included in the other-answer inputs. The connected browser leg or conference session can still incur charges while the prospect phone rings.
Does this quote a complete carrier bill?
No. The tool models the listed public-rate components and stated assumptions. It excludes taxes, surcharges, inbound calls, discounts, CPS capacity charges, short-call surcharges and other add-ons. Telnyx's exact destination rate and architecture-specific extra API charges need verification.
Can I use this without an account?
Yes. You can view the example results and official source table without an account or JavaScript. Enable JavaScript to change the assumptions. The calculator does not send your inputs to a carrier.
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