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Fixie.ai

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Build and scale real-time, speech-native voice AI agents with low latency and natural interactions.

From $100/mo, billed monthly (free plan available)
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Reviews on G2
1 review tracked

The Bottom Line

Price
From $100/mo, billed monthly (free plan available). Compare plans

Key facts

  • Develop real-time, speech-native voice AI agents.
  • Reduces latency and preserves paralinguistic cues for natural conversations.
  • Offers robust APIs, SDKs, and telephony support for easy integration and scaling.

Pros

  • Achieves real-time, natural conversations by processing speech directly
  • Significantly reduces latency compared to text-based voice AI systems
  • Preserves paralinguistic signals like tone and cadence for more human-like interactions
  • Offers a comprehensive suite of developer tools and APIs for easy integration
  • Provides dedicated infrastructure for consistent performance and scalability

Cons

  • Speech generation feature is currently listed as 'Coming Soon'
  • Enterprise pricing requires custom contact, lacking transparency for large-scale users
  • The 'Pro' plan is billed yearly, which might not suit all users

What is Fixie.ai?

Ultravox.ai, developed by Fixie.ai, is a real-time, speech-native voice AI platform designed to overcome the limitations of traditional voice AI systems. Unlike approaches that convert speech to text, Ultravox.ai processes speech directly, preserving paralinguistic signals like tone and cadence, which are crucial for natural human conversation. This speech-native approach, combined with a fully managed inference stack and dedicated infrastructure, significantly reduces latency, allowing for fast, natural, and scalable voice AI agents. The platform is built for developers and companies looking to integrate advanced voice AI capabilities into their applications. It offers robust APIs, intuitive developer kits for web and mobile, and built-in tools to help build and scale voice agents. Ultravox.ai also provides telephony support for integration with major providers. By focusing on a unified stack for audio intelligence, Ultravox.ai aims to enable the creation of highly performant voice agents that can speak, listen, and interact in real-time, mimicking human communication more effectively than existing solutions.

Available on: Web

Data compiled by Toolradar Pricing checked · How we evaluate
Source fixie.ai

Ratings Across the Web

3.5 (1 reviews)

Fixie.ai holds an aggregate rating of 3.5 out of 5 from 1 reviews across G2, last checked March 19, 2026.

G2 1 reviews
3.5/5

Ratings aggregated from independent review platforms. Learn more

Preview

Key Features

  • Speech-native model processing (Ultravox v0.7)
  • Low-latency, real-time voice AI infrastructure
  • Fully managed inference stack
  • Robust REST APIs for integration
  • Intuitive SDKs for web and mobile platforms
  • Built-in tools for building and scaling voice agents
  • Telephony support with major providers
  • Dynamic Endpointing (UltraVAD v0.1) for conversation state prediction

Pricing Plans

Pricing checked Sep 30, 2026. Source: fixie.ai/pricing, read Sep 30, 2026

Fixie.ai plans and prices, checked September 2026
Plan Price Details
Free To Start

Free

  • 5¢ per minute (including TTS)
  • Up to 5 concurrent calls
Pay Go

$0 / month

  • Perfect for just starting out and experimenting
  • Pay as you go with some hard limits
Pro

$100 / month

  • Perfect for companies that are starting to scale
  • No hard caps on concurrency
Enterprise

Contact Us

  • Designed for massive scale
  • We'll work with you to outline a plan that meets your needs
Calculate your cost View full pricing

Is Fixie.ai worth the price?

Good value

Fixie.ai offers a fair pricing structure, particularly with its 'Free To Start' and 'Pay Go' options, making it accessible for experimentation.

The 'Pro' tier at $100/month is reasonably priced for scaling companies, especially given the removal of concurrency caps. This pricing model is best for developers and businesses looking to integrate real-time voice AI agents without significant upfront investment.

Full Fixie.ai pricing: every plan, hidden costs and alternatives

Email me when Fixie.ai changes its price

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Fixie.ai by the numbers

Toolradar data: Fixie.ai's entry paid plan ($100/mo, billed monthly) ranks #51 of 54 for price among the AI Voice tools with a verified entry price and no stated unit, where the median is $10.79/mo. As of Oct 2026.

Fixie.ai compared with 127 AI Voice tools on Toolradar, as of Oct 2026
Metric Fixie.ai Peer median Position (1 is best)
Entry paid plan $100/mo, billed monthly $10.79/mo #51 of 54 tools with no stated price unit, verified price
Free plan Yes 71% have one n/a
Listed as an alternative to 3 tools 1 #40 of 127 (joint)

Each position is counted among the tools that have data for that row, as noted under it. A lower entry price ranks higher; prices are read on vendor pages and compared only with tools priced on the same basis. All AI Voice data · How we compute this. Advertising and placement fees are not inputs to any position.

Cite this: Toolradar, “Fixie.ai by the numbers”, Oct 2026.

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Best Fixie.ai Alternatives

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Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

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Fixie.ai FAQ

How does Fixie.ai's Ultravox.ai platform achieve natural voice interactions?

Fixie.ai's Ultravox.ai processes speech directly, rather than converting it to text first. This method preserves paralinguistic signals like tone and cadence, which are essential for creating natural and human-like conversations in AI agents.

Which teams would benefit most from using Fixie.ai?

Teams and developers looking to integrate advanced voice AI capabilities into their applications will find Fixie.ai most beneficial. It is designed for those who need to build and scale real-time, speech-native voice AI agents with low latency.

How is Fixie.ai priced?

Fixie.ai is available on a free tier, allowing users to get started without initial cost. For more extensive usage and advanced features, paid plans are offered.

What kind of latency improvements does Fixie.ai offer compared to traditional voice AI systems?

Fixie.ai significantly reduces latency by processing speech directly, unlike traditional systems that rely on speech-to-text conversion. This speech-native approach, combined with dedicated infrastructure, enables faster and more natural interactions.

Can Fixie.ai integrate with existing telephony systems?

Yes, Fixie.ai provides telephony support, allowing for integration with major telephony providers. This enables companies to connect their voice AI agents to existing communication infrastructures.

How does Fixie.ai compare to AssemblyAI for real-time voice processing?

Fixie.ai's Ultravox.ai platform processes speech directly to maintain paralinguistic signals and reduce latency for real-time interactions. This contrasts with approaches that might rely on converting speech to text, which can introduce delays and lose conversational nuances.

How does Fixie.ai pricing compare with other AI Voice tools?

Fixie.ai's entry paid plan ($100/mo, billed monthly) ranks #51 of 54 for price among the AI Voice tools with a verified entry price and no stated unit, where the median is $10.79/mo. Prices are read on each vendor's own pricing page and compared only with tools priced on the same basis. Source: Toolradar, Oct 2026.

Source: fixie.ai

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