diff --git a/packages/text-to-speech/src/index.ts b/packages/text-to-speech/src/index.ts
index f868a5c62..064e90411 100644
--- a/packages/text-to-speech/src/index.ts
+++ b/packages/text-to-speech/src/index.ts
@@ -13,7 +13,6 @@ import * as jwt from 'jsonwebtoken'
 import { AzureTextToSpeech } from './azureTextToSpeech'
 import { endSsml, htmlToSpeechFile, startSsml } from './htmlToSsml'
 import { OpenAITextToSpeech } from './openaiTextToSpeech'
-import { RealisticTextToSpeech } from './realisticTextToSpeech'
 import {
   SpeechMark,
   TextToSpeechInput,
@@ -59,11 +58,7 @@ Sentry.GCPFunction.init({
 const MAX_CHARACTER_COUNT = 50000
 const storage = new Storage()
 
-const textToSpeechHandlers = [
-  new OpenAITextToSpeech(),
-  new AzureTextToSpeech(),
-  new RealisticTextToSpeech(),
-]
+const textToSpeechHandlers = [new OpenAITextToSpeech(), new AzureTextToSpeech()]
 
 const synthesizeTextToSpeech = async (
   input: TextToSpeechInput
diff --git a/packages/text-to-speech/src/openaiTextToSpeech.ts b/packages/text-to-speech/src/openaiTextToSpeech.ts
index 0c4a42225..db9a42764 100644
--- a/packages/text-to-speech/src/openaiTextToSpeech.ts
+++ b/packages/text-to-speech/src/openaiTextToSpeech.ts
@@ -1,19 +1,85 @@
+import axios from 'axios'
+import { stripEmojis } from './htmlToSsml'
 import {
   TextToSpeech,
   TextToSpeechInput,
   TextToSpeechOutput,
 } from './textToSpeech'
-import axios from 'axios'
-import { stripEmojis } from './htmlToSsml'
 
-const OPEN_AI_VOICES = ['alloy', 'echo', 'fable', 'onyx', 'nova', 'shimmer']
+const OPENAI_VOICE_PREFIX = 'openai-'
+
+const isOpenAIVoice = (voice: string | undefined) =>
+  voice?.startsWith(OPENAI_VOICE_PREFIX)
+
+const getVoiceId = (name: string | undefined): string | undefined => {
+  if (!name) {
+    return undefined
+  }
+
+  if (isOpenAIVoice(name)) {
+    return name.substring(OPENAI_VOICE_PREFIX.length)
+  }
+
+  // map realistic voice name to openai voice id
+  const voiceList = [
+    {
+      voiceId: 'alloy',
+      name: 'Antoni',
+    },
+    {
+      voiceId: 'echo',
+      name: 'Serena',
+    },
+    {
+      voiceId: 'fable',
+      name: 'Daniel',
+    },
+    {
+      voiceId: 'onyx',
+      name: 'Dorothy',
+    },
+    {
+      voiceId: 'nova',
+      name: 'Michael',
+    },
+    {
+      voiceId: 'shimmer',
+      name: 'Matilda',
+    },
+    {
+      voiceId: 'alloy',
+      name: 'Rachel',
+    },
+    {
+      voiceId: 'echo',
+      name: 'Bella',
+    },
+    {
+      voiceId: 'fable',
+      name: 'Elli',
+    },
+    {
+      voiceId: 'onyx',
+      name: 'Josh',
+    },
+    {
+      voiceId: 'nova',
+      name: 'Arnold',
+    },
+    {
+      voiceId: 'shimmer',
+      name: 'Adam',
+    },
+  ]
+  return voiceList.find((voice) => voice.name === name)?.voiceId
+}
 
 export class OpenAITextToSpeech implements TextToSpeech {
   synthesizeTextToSpeech = async (
     input: TextToSpeechInput
   ): Promise<TextToSpeechOutput> => {
     const apiKey = process.env.OPENAI_API_KEY
-    const voice = input.voice?.substring('openai-'.length)
+    const voice = getVoiceId(input.voice)
 
     if (!apiKey) {
       throw new Error('API credentials not set')
@@ -48,9 +114,7 @@ export class OpenAITextToSpeech implements TextToSpeech {
   }
 
   use(input: TextToSpeechInput): boolean {
-    if (input.voice?.startsWith('openai-')) {
-      return true
-    }
-    return false
+    // Use OpenAI voice for ultra realistic voice
+    return isOpenAIVoice(input.voice) || !!input.isUltraRealisticVoice
   }
 }
diff --git a/packages/text-to-speech/src/realisticTextToSpeech.ts b/packages/text-to-speech/src/realisticTextToSpeech.ts
deleted file mode 100644
index 44aa95c46..000000000
--- a/packages/text-to-speech/src/realisticTextToSpeech.ts
+++ /dev/null
@@ -1,107 +0,0 @@
-import {
-  TextToSpeech,
-  TextToSpeechInput,
-  TextToSpeechOutput,
-} from './textToSpeech'
-import axios from 'axios'
-import { stripEmojis } from './htmlToSsml'
-
-const getRealisticVoiceId = (name: string | undefined) => {
-  const voiceList = [
-    {
-      voiceId: 'ErXwobaYiN019PkySvjV',
-      name: 'Antoni',
-    },
-    {
-      voiceId: 'pMsXgVXv3BLzUgSXRplE',
-      name: 'Serena',
-    },
-    {
-      voiceId: 'onwK4e9ZLuTAKqWW03F9',
-      name: 'Daniel',
-    },
-    {
-      voiceId: 'ThT5KcBeYPX3keUQqHPh',
-      name: 'Dorothy',
-    },
-    {
-      voiceId: 'flq6f7yk4E4fJM5XTYuZ',
-      name: 'Michael',
-    },
-    {
-      voiceId: 'XrExE9yKIg1WjnnlVkGX',
-      name: 'Matilda',
-    },
-    {
-      voiceId: '21m00Tcm4TlvDq8ikWAM',
-      name: 'Rachel',
-    },
-    {
-      voiceId: 'EXAVITQu4vr4xnSDxMaL',
-      name: 'Bella',
-    },
-    {
-      voiceId: 'MF3mGyEYCl7XYWbV9V6O',
-      name: 'Elli',
-    },
-    {
-      voiceId: 'TxGEqnHWrfWFTfGW9XjX',
-      name: 'Josh',
-    },
-    {
-      voiceId: 'VR6AewLTigWG4xSOukaG',
-      name: 'Arnold',
-    },
-    {
-      voiceId: 'pNInz6obpgDQGcFmaJgB',
-      name: 'Adam',
-    },
-  ]
-  return voiceList.find((voice) => voice.name === name)?.voiceId
-}
-
-export class RealisticTextToSpeech implements TextToSpeech {
-  synthesizeTextToSpeech = async (
-    input: TextToSpeechInput
-  ): Promise<TextToSpeechOutput> => {
-    const voiceId = getRealisticVoiceId(input.voice)
-    const apiKey = process.env.REALISTIC_VOICE_API_KEY
-    const apiEndpoint = process.env.REALISTIC_VOICE_API_ENDPOINT
-
-    if (!apiEndpoint || !apiKey || !voiceId) {
-      throw new Error('API credentials not set')
-    }
-
-    const HEADERS = {
-      'xi-api-key': apiKey,
-      voice_id: voiceId,
-      'Content-Type': 'application/json',
-    }
-
-    const requestUrl = `${apiEndpoint}${voiceId}`
-    const response = await axios.post<Buffer>(
-      requestUrl,
-      {
-        text: stripEmojis(input.text),
-      },
-      {
-        headers: HEADERS,
-        responseType: 'arraybuffer',
-      }
-    )
-
-    if (response.data.length === 0) {
-      console.log('No payload returned: ', response)
-      throw new Error('No payload returned')
-    }
-
-    return {
-      speechMarks: [],
-      audioData: response.data,
-    }
-  }
-
-  use(input: TextToSpeechInput): boolean {
-    return !!input.isUltraRealisticVoice
-  }
-}