Testing

EvalsOne

Platform for evaluating and optimizing RAG pipelines and generative AI applications with automated and human-in-the-loop testing.

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evalsone.com

Verified API available Free tier

Quick facts
What is it	Platform for evaluating and optimizing RAG pipelines and generative AI applications with automated and human-in-the-loop testing.
Pricing	Freemium
Free tier	Yes
Platform	Web Application
API	Yes
Best for	Optimizing RAG pipeline performance, Iteratively testing and improving LLM prompts
Domain registered	2023

Data updated Aug. 1, 2026

What does EvalsOne do?

EvalsOne is a specialized platform designed to help developers and teams rigorously evaluate their generative AI applications. Its core function is to provide a structured environment for testing, measuring, and optimizing components like Retrieval-Augmented Generation (RAG) pipelines, LLM prompts, and AI agents. Instead of guessing if your AI app works correctly, EvalsOne gives you the tools to systematically prove it, catching issues before they reach users.

It works by letting you create evaluation runs where you can test your AI system against various inputs and criteria. The platform stands out with its flexibility in evaluation methods, supporting everything from automated checks (using rules or another LLM as a judge) to seamlessly incorporating human expert review. You can integrate models from all major providers like OpenAI and Anthropic, or even test models running locally on your machine via Ollama. The ability to fork evaluation runs for quick iteration and use pre-built or custom evaluators makes the optimization process much more efficient.

This tool is a major benefit for any team building AI-powered products, from startups to enterprise LLMOps groups. It's particularly valuable for developers fine-tuning a RAG system for a knowledge base, ensuring answers are accurate and grounded. Researchers can use it to compare different prompt strategies or model configurations. Ultimately, EvalsOne helps build confidence in AI applications by replacing intuition with data-driven insights, streamlining the path from a prototype to a reliable, production-ready product.

Developer Tools Testing

#ai testing#llm evaluation#llmops#model integration#prompt optimization#rag pipelines

Key features

What makes it stand out

One-stop toolbox for evaluating LLM prompts, RAG processes, and AI agents

Supports rule-based and LLM-based automated evaluation methods

Integrates human evaluation seamlessly with expert judgment

Comprehensive model integration (OpenAI, Claude, Gemini, local models via Ollama)

Out-of-the-box and extensible evaluators with custom template creation

Who is EvalsOne for?

Who benefits most from this tool

Optimizing RAG pipeline performance

Iteratively testing and improving LLM prompts

Evaluating AI agent behavior before deployment

Pricing

Free tier available — start without a credit card

Starter

Free

5 custom tools
500 runs per month
1 concurrent runs
200 samples per run
2 threads per run
7 chat history days
7 file storage days
2 file upload size mb
3 custom models agents
Use shared Models/Tools/Agents
Preset evaluators available
Discord Community support
Image input support
Image and file upload
Chat history
File storage history
Use preset evaluators
Create custom evaluators using templates

Enterprise

Custom

Everything in Starter, plus:

Unlimited custom tools
Custom runs per month
Custom concurrent runs
Custom samples per run
Custom threads per run
No time limit chat history days
No time limit file storage days
20 file upload size mb
Unlimited custom models agents
Unlimited runs per month
Unlimited samples per run
Custom concurrencies of evals
Tailored evaluators for your needs
Team training on evals
One-on-one customer service
Use shared Models/Tools/Agents
Use Pro Models/Tools/Agents
Integrate custom Models/Agents
Add custom tools
Image input support
Image and file upload
Chat history
File storage history
Use preset evaluators
Create custom evaluators using templates
Tailored evaluators for customer needs
Dedicated one-on-one support

Trust & presence

Domain Domain registered 2023

Gallery

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