Personalisation
    infrastructure
    to grow your
    revenue

    Join the companies that use Lehnz to deliver personalisations, increase conversion rates, and build more profitable businesses.

    Sign inCreate account
    recommendations.lehnz.com
    $ curl -X POST \
  https://recommendations.lehnz.com/recommend \
  -H "X-API-KEY: lehnz_pk_..." \
  -d '{"user_id": "u_9a3f2", "limit": 10}'
    200 OK· 23ms
    {
  "recommendation_id": "rec_abc123",
  "all_item_ids": [
    "prod_847", "prod_234", "prod_512"
  ]
}
    Integration
    15 min
    3 lines of code
    Revenue Lift
    +24%
    avg. after 30 days
    99.9%
    Uptime SLA
    How it works

    Three steps. That's it.

    No ML expertise required. No months of training data. Just connect and go.

    1

    Send us your events

    Push clicks, views, and purchases through our API. One endpoint, any platform.

    POST /v1/events/ingest
[{ "user_id": "usr_123", "item_id": "prod_456", "event_name": "view" }]
    2

    Our engine understands instantly

    No training period. Our pre-built model analyzes your catalog and user behavior immediately, and gets smarter with every interaction.

    Ready instantly
    3

    Get personalized results

    Call one endpoint, receive ranked personalisations in under 50ms. Apply your business rules on top.

    POST /recommend
{ "all_item_ids": ["prod_789", "prod_234", "prod_512"] }

    Cold-start ready

    New users and new products get smart personalisations from day one.

    Why Lehnz

    The complicated part is done

    We handled the ML so you can focus on your product.

    Cold-start ready

    New user? New product? No problem. Our semantic engine delivers relevant personalisations from the first interaction. No historical data required.

    Average time to first personalized personalisation: <1 hour from integration

    White-box control

    We tell you what's relevant. You decide what to show. Apply business rules like inventory, margins, and promotions without touching the model.

    Show if: margin > 15% AND in_stock = true
Boost: preferred_vendor × 1.5

    Real-time performance

    Infrastructure-grade reliability. Every personalisation request returns in under 50ms with 99.99% uptime. No warm-up, no downtime, no excuses.

    <50ms response time · 99.99% uptime SLA

    Infrastructure-grade

    Built for scale from day one

    We didn't build a prototype and call it a product. Lehnz is production-ready infrastructure designed to handle serious traffic without breaking a sweat.

    <50ms
    Response time, every request
    99.99%
    Uptime SLA
    ∞
    No rate limits on paid plans
    0
    Cold-start delay
    For startups

    From zero to personalisations in an afternoon

    Simple setup, clean REST APIs, and everything works the way you expect.

    Integration checklist

    • Get your API key(2 minutes)
    • Send your first event(5 minutes)
    • Get your first personalisation(instant)
    • Go live(same day)
    Sign inCreate account
    quickstart.sh
    # 1. Send an event
    curl -X POST https://ingestion.lehnz.com/api/v1/events/ingest \
      -H "X-API-KEY: lehnz_pk_YOUR_KEY" \
      -H "Content-Type: application/json" \
      -d '[{
        "user_id": "usr_123",
        "item_id": "prod_456",
        "event_name": "view"
      }]'
     
    # 2. Get recommendations
    curl -X POST https://recommendations.lehnz.com/recommend \
      -H "X-API-KEY: lehnz_pk_YOUR_KEY" \
      -H "Content-Type: application/json" \
      -d '{"user_id": "usr_123", "limit": 10}'
     
    # Response
    {
      "recommendation_id": "rec_abc123",
      "all_item_ids": ["prod_789", "prod_234", "prod_512"]
    }

    REST APIs only

    Simple endpoints, predictable responses

    Comprehensive docs

    Every endpoint documented with examples

    Test mode included

    Experiment freely before going live

    Designed for developers

    Ship faster with a simple, powerful API

    Clean REST endpoints that work with any language, any framework, any stack. Start making requests in minutes.

    Read the docs
    ingest.sh
    curl -X POST https://ingestion.lehnz.com/api/v1/events/ingest \
      -H "X-API-KEY: lehnz_pk_YOUR_KEY" \
      -H "Content-Type: application/json" \
      -d '[{
        "user_id": "usr_123",
        "item_id": "prod_456",
        "event_name": "add_to_cart"
      }]'

    Ready to get started?

    Sign in to continue, or create an account to start integrating Lehnz.

    Sign inCreate account

    Start your integration

    Get up and running with Lehnz in as little as 10 minutes.

    API reference