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NovaSynth by Noveum Review

NovaSynth by Noveum is an AI tool that sends synthetic users to voice agents over real SIP phone calls and LiveKit audio, simulating various scenarios to test performance.

shipped Sep 17, 2026freemium
Domain rating27Monthly visits17/mo
NovaSynth by Noveum — product screenshot

Why it matters

1Offers a freemium model with 2,500 free credits per month, equivalent to approximately 100 minutes of voice agent testing.
2Simulates up to 2,000 concurrent lines for load testing AI voice agents.
3Integrates with Twilio, Plivo, Vobiz, OpenAI, Anthropic, and LiveKit.
4Automates scoring of sessions with over 30 voice AI metrics, including voice quality and telephony metrics.

About NovaSynth by Noveum

Business Model
Subscription SaaS
Usage Pricing
$0.05/call per call
Free Credits
100 free calls
Team Size
51-100
Funding
Seed
Total Raised
$500,000
Platforms
Web, API
Target Audience
Businesses with AI-driven voice agents

Pricing Plans

Starter
Free
  • • Access to basic features
  • • Limited scenarios
  • • Single agent testing
Pro
Contact sales / monthly
  • • Unlimited scenarios
  • • Multi-agent testing
  • • Custom integrations
Enterprise
Contact sales / annually
  • • All Pro features
  • • Dedicated support
  • • Custom solutions

Cost Examples

  • • Generate 10 calls: ~$0.50
  • • Test 100 calls: ~$5

Investors

Investor A, Investor B

API DocsGitHub

Specs

API Docs

View Documentation →

API Available

Yes, public API

overview

What is NovaSynth by Noveum?

NovaSynth by Noveum is an AI-powered synthetic testing system developed by Noveum that enables AI developers, QA engineers, and product teams to rigorously evaluate AI voice and chat agents before they interact with real users. It simulates realistic user interactions at scale, identifying and fixing quality issues in a controlled environment. NovaSynth is a key component of Noveum's broader AI agent reliability platform, which also includes NovaGuard (currently in private beta) for real-time guardrails.

features

Key Features of NovaSynth by Noveum

NovaSynth by Noveum provides a comprehensive suite of features for testing and evaluating AI voice and chat agents, focusing on realistic simulation and detailed performance metrics.

  • Real telephony simulation over SIP phone calls and LiveKit audio, capturing actual latency and audio quality.
  • AI-driven persona generation, allowing creation of synthetic users with specific backgrounds, tones, goals, moods, and accents.
  • Simulation of 'real-world chaos' including interruptions, barge-in, silence, background noise (e.g., honking), and topic switches.
  • Context-aware scenario generation, creating edge cases based on the AI agent's system prompt, PRD, workflows, and documentation.
  • Real-time scoring and metrics, providing over 30 voice AI metrics for voice quality, safety, and telephony.
  • Batch processing for test scenarios, enabling the execution of synthetic personas through live AI agents at scale.
  • API availability for programmatic integration and automation of testing workflows.
  • Support for multimodality, including both text and audio interactions.
  • Integration with various LLM models, including Noveum proprietary, OpenAI models, and Anthropic models.

use cases

Who Should Use NovaSynth by Noveum?

NovaSynth by Noveum is designed for teams and individuals responsible for the quality, safety, and performance of AI-driven voice and chat agents, particularly in pre-production and continuous integration environments.

  • AI developers: For pre-production testing of AI agents at scale, catching failures, and validating fixes in a controlled environment.
  • QA engineers: For writing and running test scenarios covering happy paths, edge cases, and adversarial inputs through live agents.
  • Product teams responsible for AI agent quality: For defining realistic synthetic user personas and identifying analytics trends over time to catch regressions and validate fixes.
  • Businesses with AI-driven voice agents: For simulating customer interactions and verifying system responses under stress, including load testing up to 2,000 concurrent lines.

how to use

How to Use NovaSynth by Noveum

To begin using NovaSynth by Noveum, users can sign up for the free plan, which provides 2,500 credits per month without requiring a credit card. The platform supports testing via its web interface or API.

  • 1Sign up for a Noveum account and access the NovaSynth platform.
  • 2Define realistic synthetic user personas with specific backgrounds, tones, and goals.
  • 3Write test scenarios covering happy paths, edge cases, and adversarial inputs for your AI agent.
  • 4Run synthetic personas through live AI agents at scale via voice, text, or phone calls.
  • 5Automatically score sessions with voice quality, safety, and telephony metrics.
  • 6Analyze analytics trends over time to identify regressions and validate fixes.

pricing

NovaSynth by Noveum Pricing & Plans

Noveum operates on a unified credit system that covers NovaSynth testing, eval scoring, and NovaPilot analysis. The platform offers a freemium model with a free tier and paid options for increased usage.

  • Starter: Free, includes 2,500 credits per month (approximately 100 minutes of voice agent testing or 250 text conversation tests). No credit card required.
  • Pro: Contact sales for pricing, offering more credits and advanced features.
  • Enterprise: Contact sales for pricing, designed for large-scale deployments with custom requirements.
  • Overage Billing: Available on paid plans at $0.008 per credit for usage beyond plan limits.
  • Credit Usage: NovaSynth voice call consumes 25 credits per minute; NovaSynth text conversation consumes 10 credits per conversation; NovaPilot trace analysis consumes 3 credits per trace.

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Pros

  • +Simulates real SIP phone calls and LiveKit audio, capturing actual latency and audio quality for accurate testing.
  • +Offers AI-driven persona generation with 'real-world chaos' simulation, including interruptions, background noise, and varying moods.
  • +Provides automated scoring with over 30 voice AI metrics, enabling detailed performance analysis and trend identification.
  • +Features a freemium model with 2,500 free credits per month, allowing initial evaluation without financial commitment.
  • +Integrates with major LLM providers (OpenAI, Anthropic) and telephony platforms (Twilio, Plivo, Vobiz).
  • +Capable of load testing AI agents with up to 2,000 concurrent lines.

Cons

  • −As a relatively new product (launched September 2026), independent user reviews and long-term performance data are limited.
  • −The credit-based pricing model may require careful monitoring for high-volume users to manage costs effectively.
  • −While comprehensive, the platform's focus on AI agent testing might be overly specialized for general-purpose LLM evaluation needs.
  • −The 'Pro' and 'Enterprise' pricing tiers require contacting sales, which may delay access to advanced features for some users.

Similar Tools

NovaSynth by Noveum vs Competitors

Noveum AI, with NovaSynth, positions itself as a comprehensive, closed-loop evaluation platform specifically built for AI agents, differentiating it from more generic monitoring tools or those focused solely on specific aspects like text-based evaluation.

1

Langfuse

Provides observability, evaluation, and prompt management for LLM applications, similar to Noveum's agent reliability platform.

View on Stork→
2

AgentOps

An observability platform specifically designed for AI agents, aligning with Noveum's focus on agent reliability and testing.

View on Stork→
3

Braintrust

An LLM evaluation platform that helps ensure the quality and performance of AI agents, comparable to Noveum's evaluation capabilities.

View on Stork→
4

Confident AI

Offers LLM evaluation and observability features for AI agents, similar to Noveum's comprehensive reliability platform.

View on Stork→

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