Now you can build real-time voice agents that are truly dynamic and engaging using Inworld’s state-of-the-art voice AI on Vapi dashboard. Inworld’s TTS delivers studio quality and real-time latency, but at ~5% of the cost of alternatives. You can learn more about Inworld’s text-to-speech (TTS) models here.

Inworld + Vapi: Powering the next generation of expressive, real-time voice agents

<article>
  <p style=" margin-top:2rem; margin-bottom: 4rem">
    Now you can build real-time voice agents that are truly dynamic and engaging
    using
    <a href="https://inworld.ai/tts">Inworld’s state-of-the-art voice AI</a> on
    <a href="https://vapi.ai/" target="_blank">Vapi</a> dashboard. Inworld’s TTS
    delivers studio quality and real-time latency, but at ~5% of the cost of
    alternatives. You can learn more about Inworld’s text-to-speech (TTS) models
    <a href="https://inworld.ai/blog/introducing-inworld-tts">here</a>.
  </p>

  <h3>Why Inworld + Vapi for voice AI</h3>
  <p>
    Emotionally expressive, contextually-aware voices vs. robotic chatbots are
    key for interactive experiences with voice agents. You can now access
    Inworld’s pre-built voices to build high-quality voice agents on Vapi’s
    platform. We made it seamless for developers to create assistants, coaches,
    characters, and more with dynamic personalities and understanding. Using
    Vapi, you can design suites of simulated voice agents and test different
    prompts, voices, and flows to optimize performance before going to
    production.
  </p>

  <ul class="mb-12">
    <li>
      <span class="font-bold">Expressive voices:</span> Choose from dozens of
      pre-built Inworld voices that have been trained on diverse datasets to
      capture subtle nuances in tone and prosody. Inworld voices make AI
      interactions feel more natural, which was previously only achievable via
      high-end custom pipelines.
    </li>
    <li>
      <span class="font-bold">Multilingual:</span> Build agents in 11 of the
      most common languages for consumer applications, including English (with
      its various accents), Chinese, Korean, Dutch, French, Spanish, and more.
    </li>
    <li>
      <span class="font-bold">Accessible pricing:</span>
      Studio-quality voices for just $5/M characters, which is 5% of the cost of
      TTS from leading labs, so you can build engaging experiences that scale
      with your users.
    </li>
    <li>
      <span class="font-bold">Streaming-ready:</span> Inworld voices support
      ~200ms latency to the first audio chunk to meet a range of voice agent use
      cases.
    </li>
    <li>
      <span class="font-bold">API-native:</span> Everything is exposed on Vapi
      as an API, with 1000s of configurations and integrations. Plug in your
      APIs as tools to intelligently fetch data and perform actions on your
      server.
    </li>
  </ul>
  <h3>By developers, for developers</h3>
  <p>
    Create a Vapi account to easily access the catalog of Inworld voices in a
    variety of languages. In your Vapi dashboard, you can test messaging and
    customize the system prompt to your brand, narrative tone, or interaction
    type. Just press ‘Talk to Assistant’ to start testing.
  </p>

  <img
    style="width: 100%; height: auto"
    alt="Screenshot of Vapi dashboard"
    src="https://images.prismic.io/inworld-web/aG_YzEMqNJQqHws7_vapi.jpg?auto=format,compress"
  />
  <br />
  <p>Interested in learning more? You can find additional details here.</p>
  <div class="flex flex-col gap-4 mb-12">
    <a
      href="https://docs.vapi.ai/api-reference/assistants/create#request.body.voice"
      target="_blank"
      >Vapi Assistant Documentation</a
    >
    <a href="https://docs.vapi.ai/providers/voice/inworld" target="_blank"
      >Vapi Integration Guide</a
    >
    <a href="https://inworld.ai/blog/introducing-inworld-tts" target="_blank"
      >Inworld Text-to-Speech Overview</a
    >
    <a href="https://docs.inworld.ai/docs/tts/integrations" target="_blank"
      >Inworld Text-to-Speech Documentation</a
    >
  </div>
  <h3 class='mt-8'>Inworld x Vapi collaboration</h3>
  <p>
    Together, Inworld and Vapi want to simplify the complexities inherent in
    voice AI for developers. By abstracting intricate technical details,
    developers can focus on crafting the core logic of their voice agents and
    adapt instantly to users.
  </p>
  <p class="quote">
    We’re thrilled to partner with Vapi to bring high-quality, real-time latency
    voices at a radically more accessible price point to their developer
    community. By democratizing access to state-of-the-art TTS technology, we’re
    excited to empower the next wave of innovation in voice-first experiences.”
  </p>
  <p class="attribution">
    <span class="attribution__name">Jean Wang,</span>
    <span class="attribution__title">Inworld Head of Product.</span>
  </p>
  <p class="quote">
    Working with Inworld helps us open up new possibilities for developers
    building expressive, real-time voice agents. The focus is always on giving
    builders access to great tools, and this integration fits perfectly with
    that mission. We’re excited to see what our developer community creates
    next.”
  </p>

  <p class="attribution">
    <span class="attribution__name">Jordan Dearsley,</span>
    <span class="attribution__title">Vapi Co-Founder</span>
  </p>
</article>
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