Evaligo

Test, evaluate, and optimize AI prompts with confidence

Professional prompt engineering tools. A/B test prompts, run evaluations at scale, and monitor production quality - all in one platform.

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Prompt Engineering Playground - Interactive testing with side-by-side comparison
01

Design & Experiment with Prompt Generation Tools

AI-Powered Prompt Optimization Tools

Continuously improve your prompts and agents with Evaly's smart suggestions, evaluations, and automated feedback loops. Let AI guide you to higher quality and reliability.

View DocsStart Optimizing Prompts
AI-Powered Prompt Optimization Tools - AI prompt optimization tool interface
Interactive Prompt Playground & Debugging - AI prompt testing tool interface

Interactive Prompt Playground & Debugging

Experiment, replay, and debug prompts in a collaborative playground. Instantly see the impact of changes and get AI-driven recommendations for improvement.

View DocsTry Prompt Generation
02

Evaluate and Manage AI Prompts

LLM as a Judge for Prompt Evaluation

Harness advanced language models to evaluate outputs at scale. Get nuanced, consistent scoring and actionable insights for every experiment.

* Also includes Human-in-the-Loop Annotation for blending AI and human expertise.

View DocsStart Testing AI
LLM as a Judge for Prompt Evaluation - AI prompt management tool interface
Prompt Management, Deployment, Testing & CI/CD - AI prompt management tool interface

Prompt Management, Deployment, Testing & CI/CD

Organize, version, and deploy prompts at scale. Empower your team to iterate quickly and safely with robust management tools. Catch regressions before they reach production. Integrate evaluation-driven checks into your deployment pipeline for continuous quality.

View DocsDeploy Prompts
03

Production Observability & Monitoring

Real-Time Tracing & Debugging

Gain full visibility into every prompt, response, and model decision in production. Trace issues instantly and optimize your AI stack with complete transparency.

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Cost and latency per run

Every experiment records the judge score, cost per output and latency of each variant, so a change in model or prompt is compared on all three before it goes live.

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Production Analytics & Dashboards

Track production trends, surface anomalies, and share real-time insights with your team. Make data-driven decisions with comprehensive, actionable dashboards.

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Use Cases: AI Prompt Tools

Prompt Optimizer

Boost accuracy with an AI prompt optimizer that evaluates, scores, and improves prompts automatically.

AI Prompt Generation

Generate and refine prompts quickly with guided prompt generation tools and a collaborative playground.

AI Testing & Evaluation

Automate AI testing with LLM-as-a-judge, regression checks, and production monitoring for reliability.

Start Building Prompts Free
No credit card needed. Free forever.

Simple, Transparent Pricing

Start free, scale as you grow. All plans include our core features with no hidden fees or surprises.

Start Here

Free

No setup fees
Free

Perfect for getting started with AI prompts and testing ideas.

  • 500 free credits/month for LLM calls
  • Prompt generation
  • Schema editor
  • Upload evaluation data
  • API for evaluation & deployment
  • Model & prompt selection (OpenAI, Claude, Google, etc.)
  • Comprehensive evaluation & metrics
  • Cost, latency & quality optimization
  • Side-by-side model comparisons
  • Real-time feedback & analytics
  • Production-ready API
Get Started Free

Pro

Cancel AnytimeNo setup fees
$7/month

For users who want to create and refine unlimited prompts, with more credits for LLM calls.

  • Unlimited usage*Key difference in Pro package
  • Prompt generation
  • Schema editor
  • Upload evaluation data
  • API for evaluation & deployment
  • Model & prompt selection (OpenAI, Claude, Google, etc.)
  • Comprehensive evaluation & metrics
  • Cost, latency & quality optimization
  • Side-by-side model comparisons
  • Real-time feedback & analytics
  • Production-ready API
Upgrade to Pro
* Usage subject to fair use policy and certain thresholds.

Start Building Free Today

Start with our forever free plan and upgrade when you're ready. No credit card required, no setup fees, cancel anytime.

Start Building Free📺 Book Demo

Free plan • Cancel anytime

The Complete AI Development Workflow

Get from idea to production in just three simple steps. Our platform handles the complexity so you can focus on building reliable AI applications.

Step 01

Iterate

Rapidly refine prompts in playgrounds. Swap models, edit scorers, and see instant feedback. No setup required.

Step 02

Eval

Test every change for accuracy and safety. Prevent regressions with automated checks. Custom metrics, qualitative & quantitative analysis.

Step 03

Ship

Monitor production in real time. Get alerts and automate reliability. Track latency, cost, and quality metrics.

Test AI Prompts Instantly – Free
No credit card needed. Free forever.

Compare models on your own data

Run your prompt or flow on several models, let blind judges score the outputs, and compare them on quality, cost and speed.

6 models
compared in one experiment, open source and closed
3 judges
from three vendors scoring every output blind
30 inputs
the same 30 bios run through every model
Run your first A/B test free
Free plan, no credit card.

Free plan • 500 credits a month • No credit card • Cancel anytime