> ## Documentation Index
> Fetch the complete documentation index at: https://docs.convocore.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Voice Pricing

> Complete transparency on how voice-to-voice interactions are priced, including platform fees and provider costs.

<Tip>
  Compare live rates on [convocore.ai/pricing](https://www.convocore.ai/pricing) (Voice section), or use the **Pricing Calculator** on your dashboard **Billing** page.
</Tip>

<Note>
  On the **v2-2026** catalog, Voice / phone (SIP + Twilio) starts on **Business** ($99/mo), or via the **Voice / phone** add-on ($29/mo) on a lower tier. Extra concurrent lines are $5/mo; extra Twilio number slots are $3/mo. Pre–August 2026 plans keep their existing voice access.
</Note>

***

## Full transparency pricing

Voice is billed **per minute of call time**. Total cost ≈ **platform fee + STT + TTS** (or a realtime STS model) **+ LLM (if separate) + telephony (optional)**.

**1 credit = $0.001** · **1,000 credits = $1**

***

## Platform base fee

Convocore charges a **platform fee of 20 credits per minute** (**\$0.020/min**) on every call, in addition to provider rates. This covers infrastructure, realtime routing, monitoring, and platform features.

<Note>
  The platform fee is the same across all plans that include voice. Your subscription tier determines how many concurrent calls and Twilio number slots you get — see [Concurrency limits](#concurrency-limits) below.
</Note>

***

## Total cost breakdown

**Example (standard STT + TTS stack):**

* Platform fee: \$0.020/min (20 cr)
* STT (AssemblyAI): \$0.008/min (8 cr)
* TTS (Google Cloud): \$0.010/min (10 cr)
* LLM (e.g. GPT-4o Mini): varies by tokens
* **Providers + platform (ex-LLM): \~$0.038/min or ~$3.80 per 100 minutes**

Provider rates below are **platform USD/min** (and credits). They match the public pricing page.

***

## Realtime speech-to-speech

All-in-one realtime models replace separate STT + TTS (+ often the LLM) with a single per-minute rate, still plus the platform fee.

| Provider                   | \$ / min | Credits / min | + platform      |
| -------------------------- | -------- | ------------- | --------------- |
| **Gemini Live (realtime)** | \$0.010  | 10            | \$0.030 (30 cr) |
| **Ultravox (realtime)**    | \$0.070  | 70            | \$0.090 (90 cr) |
| **Grok Live (realtime)**   | \$0.070  | 70            | \$0.090 (90 cr) |

**Gemini Live example (no telephony):** $0.010 provider + $0.020 platform = **$0.030/min** ($3 per 100 minutes).\
**With Twilio estimate:** add \~$0.015/min → **~$0.045/min**.

***

## Speech-to-text (STT)

| Provider                | \$ / min | Credits / min | + platform      |
| ----------------------- | -------- | ------------- | --------------- |
| **Speechmatics**        | \$0.0040 | 4             | \$0.024 (24 cr) |
| **Google Cloud Speech** | \$0.0060 | 6             | \$0.026 (26 cr) |
| **AssemblyAI**          | \$0.0080 | 8             | \$0.028 (28 cr) |
| **Deepgram**            | \$0.010  | 10            | \$0.030 (30 cr) |
| **Gladia**              | \$0.013  | 13            | \$0.033 (33 cr) |

***

## Text-to-speech (TTS)

| Provider             | \$ / min | Credits / min | + platform      |
| -------------------- | -------- | ------------- | --------------- |
| **Google Cloud TTS** | \$0.010  | 10            | \$0.030 (30 cr) |
| **Rime AI**          | \$0.015  | 15            | \$0.035 (35 cr) |
| **MiniMax TTS**      | \$0.015  | 15            | \$0.035 (35 cr) |
| **OpenAI TTS**       | \$0.016  | 16            | \$0.036 (36 cr) |
| **Azure Speech**     | \$0.019  | 19            | \$0.039 (39 cr) |
| **Cartesia**         | \$0.022  | 22            | \$0.042 (42 cr) |
| **ElevenLabs**       | \$0.040  | 40            | \$0.060 (60 cr) |
| **PlayHT**           | \$0.070  | 70            | \$0.090 (90 cr) |

***

## Telephony

| Provider                    | \$ / min | Credits / min | + platform      |
| --------------------------- | -------- | ------------- | --------------- |
| **Twilio (telephony est.)** | \$0.015  | 15            | \$0.035 (35 cr) |

Twilio is only charged when you use phone numbers / PSTN. SIP BYO trunks follow your carrier’s rates separately.

***

## Concurrency limits

On **v2-2026**, included voice capacity:

| Plan                     | Concurrent calls       | Twilio number slots |
| ------------------------ | ---------------------- | ------------------- |
| **Free / Starter / Pro** | 0 (voice not included) | 0                   |
| **Business**             | 3                      | 2                   |
| **White Label**          | 10                     | 3                   |
| **White Label Elite**    | 25                     | 5                   |

Buy extra capacity without changing plan:

| Add-on                                        | Price   |
| --------------------------------------------- | ------- |
| Concurrent call line                          | \$5/mo  |
| Twilio phone number slot                      | \$3/mo  |
| Voice / phone (unlocks voice on a lower tier) | \$29/mo |
| SIP trunk (BYO SIP)                           | \$15/mo |

<Note>
  The Voice add-on unlocks voice features; it does not add call lines or number slots. Add those separately if your plan’s included capacity is 0.
</Note>

***

## Bring your own API keys

<Warning>
  You currently **cannot** use your own API keys for STT/TTS/STS voice providers. BYOK for voice providers is not available yet.
</Warning>

You **can** bring your own **LLM** API keys (OpenAI, Anthropic, Google, and more), which can cut LLM credit burn dramatically. On **v2-2026**, BYOK + premium (Tier 1) models are included on **Business+**, or via the **BYOK + premium models** add-on (\$20/mo).

***

## Pricing summary

| Component              | Cost range          | Notes                                               |
| ---------------------- | ------------------- | --------------------------------------------------- |
| **Platform fee**       | \$0.020/min (20 cr) | Fixed on every call                                 |
| **Speech-to-Text**     | $0.004 – $0.013/min | Speechmatics is lowest                              |
| **Text-to-Speech**     | $0.010 – $0.070/min | Google Cloud TTS is lowest                          |
| **Realtime STS**       | $0.010 – $0.070/min | Gemini Live is lowest                               |
| **Telephony (Twilio)** | \~\$0.015/min       | Only if using phone numbers                         |
| **Concurrency**        | 3 / 10 / 25         | Business / White Label / Elite (extra lines \$5/mo) |

### Real-world examples

**Budget STT + TTS:**

* Platform $0.020 + AssemblyAI $0.008 + Google TTS $0.010 ≈ **$0.038/min\*\* (+ LLM)

**Premium STT + TTS:**

* Platform $0.020 + Deepgram $0.010 + ElevenLabs $0.040 ≈ **$0.070/min\*\* (+ LLM)

**Gemini Live realtime:**

* Platform $0.020 + Gemini Live $0.010 = **\$0.030/min**

<Tip>
  Use the voice minutes calculator on [convocore.ai/pricing](https://www.convocore.ai/pricing) or Billing to estimate monthly credit burn for your stack.
</Tip>

***

## Cost optimization tips

1. Prefer **Speechmatics** or **Google Cloud Speech** for budget STT
2. Prefer **Google Cloud TTS** for budget synthesis
3. Prefer **Gemini Live** when you want a single realtime stack
4. Bring your own LLM keys on Business+ to cut token credit burn
5. Size concurrent lines to real peak load — extras are \$5/mo each

***

## Next steps

* **[Billing](../Pricing/billing)** — View plans and subscribe
* **[Credits](../Pricing/credits)** — Credit system and LLM rates
* **[Provider cost estimates](../Pricing/provider-cost-estimates)** — STT / TTS tables
* **[Twilio setup](./setup/twilio)** — Phone calling
* **[Live pricing](https://www.convocore.ai/pricing)** — Interactive comparison