Experimentation Platform Built for the AI Era

Move fast with confidence. Run A/B tests, feature flags, and LLM experiments backed by rigorous statistics and self-improving AI optimization.

Experiments Observation Iteration
Checkout Flow Redesign Ship Treatment
Conversion Lift +18%
Revenue Impact +$127K
GPT-4o vs Claude 3.5 Routing Running
Cost Reduction -37%
Users Tested 8,432
Avg. Conversation Length (Last 24h)
Gemini 2.5 GPT-5
8m 4m 0m 12am 6am 12pm 6pm Now
3.8m Gemini Avg
5.2m GPT-5 Avg
1.4m Time Saved
Customer Support Bot -- Prompt Optimization Active
Generation 23 / 50
Resolution Rate 89%
vs Baseline +26%

Self-Improving AI

Continuously optimize prompts, parameters, and routing using genetic algorithms and reinforcement learning. Learns from real user outcomes automatically.

  • Genetic algorithms for continuous optimization
  • Multi-armed bandits for parameter tuning
  • Contextual bandits for smart routing

Statistical Rigor

Sequential testing, confidence intervals, and guardrail metrics so you make data-driven decisions with confidence.

  • P-values and confidence intervals
  • Sequential testing (stop early or continue)
  • Guardrail metrics (ensure no regressions)

LLM Gateway

Experiment on LLM models, prompts, and parameters transparently. OpenAI-compatible API acts as a drop-in replacement.

  • OpenAI-compatible API (drop-in replacement)
  • Route between GPT-4o, Claude, and more
  • Track cost, latency, quality per variant
Your App Gateway GPT-4o Claude Gemini

How It Works

01

Create Experiment

Define what you want to test: feature flags, A/B tests, LLM experiments—or let AI auto-optimize.

  • Feature flags (dark mode, new UI)
  • A/B tests (pricing, copy, layouts)
  • LLM experiments (models, prompts)
  • Or let AI auto-optimize
{
  "name": "Pricing Test",
  "type": "a/b",
  "variants": ["$39", "$49"],
  "metric": "conversion"
}
02

Integrate SDK

Add our SDK to your app (2 lines of code). Supports Python, Node.js, Go, Ruby, Java.

const client = new XVariantClient('your-api-key');
const config = await client.getAssignment(userId, experimentId);
03

Ship Winners

We tell you when to ship, backed by statistics.

✓ Ship Treatment 99% confidence
Expected impact: +41% conversion
Guardrails passed: All clear
100% 50% 0% Day 1 Day 3 Day 5 Control Treatment

Built For Your Use Case

Ship Features Safely

Test pricing, onboarding flows, and UI changes with confidence. Know which variant drives more conversions before going all-in.

"We increased conversion by 41% by testing $39 vs $49 pricing. XVariant told us to ship after 5 days with 99% confidence."

+41%
Conversion Increase

Optimize Your AI Stack

Test models (GPT-4o vs Claude), prompts (system messages), and parameters (temperature) without deploying code.

"We saved $2,400/month by routing 60% of requests to GPT-4o-mini after proving it had equal quality."

$2.4K
Monthly Savings

Session-Based Experimentation

Track conversations from first message to outcome (purchase, thumbs up). Attribute success to the right variant, even days later.

"We improved user satisfaction by 23% by auto-optimizing our system prompt using XVariant's genetic algorithms."

+23%
Satisfaction Increase

Works With Your Stack

Languages

Python Node.js Go Ruby Java PHP

Frameworks

Next.js React Django FastAPI Rails Express

LLM Providers

OpenAI Anthropic Azure OpenAI AWS Bedrock

Infrastructure

Docker Kubernetes AWS GCP Azure

SOC 2 Type II

Compliance in progress

GDPR Compliant

EU data residency available

99.9% Uptime

Enterprise SLA

On-Premise

Your data, your infrastructure

Stop Guessing.

Join product teams at fast-growing companies who use XVariant to make data-driven decisions and optimize their AI products continuously.

Have questions? Contact us or Read the docs