> ## Documentation Index
> Fetch the complete documentation index at: https://docs.convocore.ai/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.
Compare live rates on [convocore.ai/pricing](https://www.convocore.ai/pricing) (Voice section), or use the **Pricing Calculator** on your dashboard **Billing** page.
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.
***
## 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.
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.
***
## 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 |
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.
***
## Bring your own API keys
You currently **cannot** use your own API keys for STT/TTS/STS voice providers. BYOK for voice providers is not available yet.
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**
Use the voice minutes calculator on [convocore.ai/pricing](https://www.convocore.ai/pricing) or Billing to estimate monthly credit burn for your stack.
***
## 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
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