NovaSynth

NovaSynth

Noveum
Opik

Opik

Comet
+
+

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About

NovaSynth is a web-based platform for testing voice and chat AI agents. Developers and QA teams connect an agent through a phone, LiveKit, or HTTP Chat connection, then define synthetic caller personas and conversation scenarios. Single or batch runs can exercise interruptions, background noise, accents, and other edge cases. NovaSynth records sessions and traces, with transcripts and evaluation results teams can review to identify failures and compare runs after agent changes. It supports evaluation and regression testing before and after deployment. Usage is credit-based: the free plan includes 2,500 credits per month, and Pro starts at $69/month with 10,000 credits. Voice calls use 100 credits per minute, text conversations use 12 credits each, and evaluation may consume additional credits. Teams need an account and a configured, reachable agent connection for testing.

About

Confidently evaluate, test, and ship LLM applications with a suite of observability tools to calibrate language model outputs across your dev and production lifecycle. Log traces and spans, define and compute evaluation metrics, score LLM outputs, compare performance across app versions, and more. Record, sort, search, and understand each step your LLM app takes to generate a response. Manually annotate, view, and compare LLM responses in a user-friendly table. Log traces during development and in production. Run experiments with different prompts and evaluate against a test set. Choose and run pre-configured evaluation metrics or define your own with our convenient SDK library. Consult built-in LLM judges for complex issues like hallucination detection, factuality, and moderation. Establish reliable performance baselines with Opik's LLM unit tests, built on PyTest. Build comprehensive test suites to evaluate your entire LLM pipeline on every deployment.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers and QA teams building voice AI agents and testing phone-, LiveKit-, or HTTP Chat-connected agents before deployment and after changes.

Audience

Developers looking for a solution to evaluate, test, and monitor their LLM applications

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Supported
24/7 Live Support Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$69/month
The free plan includes 2,500 shared credits per month. Pro costs $69/month and includes 10,000 credits per month. Voice calls use 100 credits per minute, and text conversations use 12 credits each. Some evaluation checks consume additional credits. One-time credit packs are available and do not expire.
Free Version Supported
Free Trial Not Supported

Pricing

$39 per month
Free Version Supported
Free Trial Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 4.0 / 5
support 5.0 / 5

Pros & Cons from Real Users

Pros

  • My team has switched to Opik from Arize about 4 months ago. We have evaluated Arize, Langfuse, Opik and Langsmith. Overall Opik was the best platform. Phoenix OSS doesn't have half the features, Langsmith is nice but super expensive and not OSS and Langfuse is brittle and has tons of performance issues. We found one bug on Opik, opened a PR on the GH repo and it was fixed and merged in less than 5 hours.

Cons

  • Personally I think they can make the UI a bit prettier.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Supported
Live Online Supported
In Person Supported

Company Information

Noveum
Founded: 2023
United States
noveum.ai/en/novasynth

Company Information

Comet
Founded: 2017
United States
www.comet.com/site/products/opik/

Alternatives

Alternatives

DeepEval

DeepEval

Confident AI
TestMu AI

TestMu AI

TestMu AI (Formerly LambdaTest)
Selene 1

Selene 1

atla
ArtificialQA

ArtificialQA

QAlified

Categories

AI Testing Tools Supported

Categories

LLM Evaluation Supported

Integrations

Azure OpenAI Service Not Supported
Claude Not Supported
Claude for Legal Not Supported
DeepEval Not Supported
Flowise Not Supported
Hugging Face Not Supported
Kong AI Gateway Not Supported
LangChain Not Supported
LiteLLM Not Supported
LiveKit Supported
LlamaIndex Not Supported
OpenAI Not Supported
OpenAI o1 Not Supported
Pinecone Not Supported
Predibase Not Supported
Ragas Not Supported
pytest Not Supported

Integrations

Azure OpenAI Service Supported
Claude Supported
Claude for Legal Supported
DeepEval Supported
Flowise Supported
Hugging Face Supported
Kong AI Gateway Supported
LangChain Supported
LiteLLM Supported
LiveKit Not Supported
LlamaIndex Supported
OpenAI Supported
OpenAI o1 Supported
Pinecone Supported
Predibase Supported
Ragas Supported
pytest Supported
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