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Fixie AI

We're building AIs that can communicate as naturally as humans. Check out our realtime model work at https://ultravox.ai

Routing & Optimization
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Founded

2022

Location

Seattle, WA

Employees

18

Funding

$17M Series A

Ultravox.ai (formerly Fixie.ai): Next‑Gen Real‑Time Voice AI

Ultravox.ai (rebranded from Fixie.ai) builds an open‑weight Speech Language Model (SLM) and a realtime voice stack for natural, low‑latency conversations. The platform is designed for speech‑native agents that handle interruptions, overlapping speech, and streaming audio—powering production‑grade voice interfaces for customer support, sales, and in‑app experiences.

  • Website: [Ultravox.ai](https://fixie.ai)
  • LinkedIn: [Ultravox.ai company page](https://www.linkedin.com/company/ultravox-ai)
  • GitHub: [fixie-ai organization](https://github.com/fixie-ai)
  • Open models: [Ultravox on Hugging Face](https://huggingface.co/fixie-ai)
  • Funding: [$17M seed (TechCrunch)](https://techcrunch.com/2023/03/30/fixie-wants-to-make-it-easier-for-companies-to-build-on-top-of-language-models/)
  • Partner news: [Hexaware x Ultravox Realtime](https://finance.yahoo.com/news/hexaware-teams-fixie-ai-power-142100568.html)

    • Snapshot

  • Name: **Ultravox.ai** (rebranded from Fixie.ai)
  • Focus: **Real‑time voice AI** with **open‑weight** SLMs and developer tooling
  • HQ: Seattle, WA (via [LinkedIn](https://www.linkedin.com/company/ultravox-ai))
  • Team: ~17 employees (LinkedIn)
  • Market positioning: “**Next‑Gen Voice AI**” for speech‑native agents and enterprise deployments

    • What Ultravox Offers

  • **Open‑weight Speech Language Model (Ultravox):** Understands speech directly for lower latency vs. cascaded ASR + LLM pipelines. Releases and updates are shared via [Hugging Face](https://huggingface.co/fixie-ai) and [GitHub](https://github.com/fixie-ai).
  • **Realtime Voice Stack:** Built for barge‑in, natural turn‑taking, and overlapping speech—key for contact centers, IVR, and in‑app assistants. Overview and messaging on the [company site](https://fixie.ai).
  • **Developer Tooling:** SDKs, APIs, examples, and open resources to accelerate prototyping and controlled deployments. Explore repos on [GitHub](https://github.com/fixie-ai).
  • **Enterprise Integrations:** Delivered directly and with SI/BPO partners; notably, Hexaware highlights Ultravox Realtime for banking, insurance, retail, travel, and healthcare in this [partnership announcement](https://finance.yahoo.com/news/hexaware-teams-fixie-ai-power-142100568.html).

    • Why It Matters

  • **Speech‑native design:** Direct speech understanding reduces latency and enables more natural conversations than traditional ASR → NLU → TTS cascades.
  • **Open weights:** Appeals to teams needing model control, on‑premise options, and governance—see community interest around [Ultravox 0.4.1](https://www.reddit.com/r/OpenSourceeAI/comments/1gqvguq/fixie_ai_introduces_ultravox_v041_a_family_of/).
  • **Production readiness for voice:** Barge‑in, streaming, and WebRTC support align with modern contact center and CX requirements.

    • Core Use Cases

  • **Voice IVR and receptionist‑style agents** for inbound/outbound calls
  • **Contact center assistants** for intent capture, routing, and self‑serve resolution
  • **Sales development and scheduling assistants**
  • **In‑app voice assistants** for mobile or web
  • **Dictation and hands‑free workflows** for field operations

    • Integrations and Build Options

  • **Ultravox Realtime APIs/SDKs** for programmatic access (see platform details on the [company site](https://fixie.ai))
  • **WebRTC‑based realtime audio** for browsers and mobile apps
  • **Open‑source examples and templates** on the [GitHub org](https://github.com/fixie-ai)
  • **Enterprise deployments with partners** such as Hexaware

    • Ideal Customers

  • Enterprises building **voice agents** for support and sales
  • **Contact centers** and CX leaders prioritizing low‑latency, natural speech
  • **Developers** and platform teams who value open‑weight models and deployment control
  • **Systems integrators/BPOs** embedding voice AI into existing workflows

    • Strengths and Considerations

  • Pros
  • **Open‑weight speech models** and frequent releases resonate with builders seeking control and on‑prem options .
  • **Realtime, speech‑native stack** emphasizes barge‑in and turn‑taking for contact center grade interactions (see the [company site](https://fixie.ai)).
  • **Developer‑forward tooling** with examples and repos simplifies prototyping .
  • Cons
  • **Limited third‑party reviews** on procurement platforms (no dedicated G2/Capterra entries spotted).
  • **Early‑stage setup complexity** and production integration questions surface in community/press context (see [The New Stack](https://thenewstack.io/fixie-and-its-agent-approach-to-leveraging-llms/)).
  • **Sparse public benchmarks/pricing**; few published SLA, latency, or TCO details .

    • Pricing and Trial

  • No public pricing or free trial listed. Prospects should **contact sales** via the [company site](https://fixie.ai) or engage through partners like Hexaware .

    • Background and Rebrand

  • The company previously operated as **Fixie.ai**, focusing on general agent frameworks and routing (see the Fixie‑era intro on [Medium](https://medium.com/fixie-ai/introducing-fixie-ai-a-new-way-to-build-with-large-language-models-d4e1aeee6b81) and coverage by [The New Stack](https://thenewstack.io/fixie-and-its-agent-approach-to-leveraging-llms/)).
  • With the **Ultravox** rebrand, emphasis shifted to **speech‑native agents**, **open‑weight SLMs**, and a **realtime voice infrastructure**—positioned today as “Next‑Gen Voice AI” on the [official site](https://fixie.ai).

    • Notable Links

  • Company: [Ultravox.ai](https://fixie.ai)
  • LinkedIn: [Ultravox.ai company page](https://www.linkedin.com/company/ultravox-ai)
  • GitHub: [fixie-ai organization](https://github.com/fixie-ai)
  • Hugging Face: [Ultravox model releases](https://huggingface.co/fixie-ai)
  • Funding: [$17M seed (TechCrunch)](https://techcrunch.com/2023/03/30/fixie-wants-to-make-it-easier-for-companies-to-build-on-top-of-language-models/)
  • Partnership: [Hexaware x Ultravox Realtime](https://finance.yahoo.com/news/hexaware-teams-fixie-ai-power-142100568.html)
  • Context: [The New Stack on Fixie’s agent approach](https://thenewstack.io/fixie-and-its-agent-approach-to-leveraging-llms/)
  • Community: [Ultravox 0.4.1 discussion](https://www.reddit.com/r/OpenSourceeAI/comments/1gqvguq/fixie_ai_introduces_ultravox_v041_a_family_of/)

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