docs: simplify BYOK tables to bullet lists

- Convert Speech-to-Text provider table to bullet list format
- Convert Language Model provider table to bullet list format
- Convert Text-to-Speech provider table to bullet list format
- Maintain custom voice references (confirmed supported via CustomVoice class)

VAP-11220

Author: vapi-tasker[bot]

fern/security-and-privacy/data-flow.mdx

@@ -93,15 +93,9 @@ Converts user audio into text in real-time using streaming recognition.
 **Custom Transcriber:** Vapi supports custom transcriber integration via WebSocket. See [Custom Transcriber](/customization/custom-transcriber).
 </Note>
 
-| Provider | Bring Your Own API Key |
-|----------|----------------------|
-| Deepgram | ✅ Yes |
-| Gladia | ✅ Yes |
-| AssemblyAI | ✅ Yes |
-| Speechmatics | ✅ Yes |
-| Google | ✅ Yes |
-| Azure | ✅ Yes |
-| Talkscriber | ❌ No |
+**Bring Your Own API Key:**
+- ✅ Supported: Deepgram, Gladia, AssemblyAI, Speechmatics, Google, Azure
+- ❌ Not supported: Talkscriber
 
 ### 3. Orchestration Layer (Vapi Proprietary)
 
@@ -129,21 +123,8 @@ Generates conversational responses based on transcribed user input.
 **Custom LLM:** Vapi supports custom LLM integration via OpenAI-compatible endpoints. See [Custom LLM](/customization/custom-llm/using-your-server).
 </Note>
 
-| Provider | Bring Your Own API Key |
-|----------|----------------------|
-| OpenAI | ✅ Yes |
-| Anthropic | ✅ Yes |
-| Azure OpenAI | ✅ Yes |
-| Google Gemini | ✅ Yes |
-| Groq | ✅ Yes |
-| DeepSeek | ✅ Yes |
-| OpenRouter | ✅ Yes |
-| Together AI | ✅ Yes |
-| Cerebras | ✅ Yes |
-| DeepInfra | ✅ Yes |
-| Perplexity | ✅ Yes |
-| Anyscale | ✅ Yes |
-| xAI | ✅ Yes |
+**Bring Your Own API Key:**
+- ✅ Supported: OpenAI, Anthropic, Azure OpenAI, Google Gemini, Groq, DeepSeek, OpenRouter, Together AI, Cerebras, DeepInfra, Perplexity, Anyscale, xAI
 
 ### 5. Text-to-Speech (Voice)
 
@@ -153,20 +134,8 @@ Converts LLM responses into spoken audio.
 **Custom Voice:** Vapi supports custom TTS integration via audio streaming endpoints. See [Custom TTS](/customization/custom-tts).
 </Note>
 
-| Provider | Bring Your Own API Key |
-|----------|----------------------|
-| ElevenLabs | ✅ Yes |
-| PlayHT | ✅ Yes |
-| Cartesia | ✅ Yes |
-| Deepgram | ✅ Yes |
-| OpenAI TTS | ✅ Yes |
-| Azure | ✅ Yes |
-| LMNT | ✅ Yes |
-| Rime AI | ✅ Yes |
-| Smallest AI | ✅ Yes |
-| Neuphonic | ✅ Yes |
-| WellSaid | ✅ Yes |
-| Hume | ✅ Yes |
+**Bring Your Own API Key:**
+- ✅ Supported: ElevenLabs, PlayHT, Cartesia, Deepgram, OpenAI TTS, Azure, LMNT, Rime AI, Smallest AI, Neuphonic, WellSaid, Hume
 
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