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Bot Builder

Create AI-powered chatbots without writing a single line of code. cachly handles sessions, semantic cache, and LLM cost optimization — you define the persona and knowledge.

🚀 Open Bot Builder ⚡ Try live demo

How it works — 5 steps

📋 Pick a template

Start with Customer Support, Restaurant, E-Commerce, Personal AI, Onboarding Guide, or Internal Wiki — or build from scratch.

💬 Choose a channel

Web Widget, WhatsApp, Telegram, Slack, Discord, or REST API. Your bot speaks the same language as your users.

🎭 Define the persona

Name, role, tone, system instructions, and LLM model (gpt-4o-mini by default). cachly pre-fills sensible defaults per template.

📚 Add knowledge

Paste FAQ pairs, a URL, or raw text. cachly stores it in Semantic Cache (pgvector) so your bot can answer domain-specific questions instantly.

🚀 Deploy

Get a ready-to-run deploy package: .env, Dockerfile, docker-compose.yml. Works on Docker, Railway, or Vercel. cachly powers sessions and cache.

docker compose up -d

What cachly provides

⚡

Valkey Sessions

Every conversation is stored in your cachly Valkey instance. Sessions survive restarts and scale horizontally.

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Semantic Cache

Repeated or similar questions are answered from cache — no LLM call, instant response. Saves cost, speeds up UX.

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GDPR-compliant

All data stays in your cachly instance (Germany, Hetzner). No third-party data sharing. Full DPA available.

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Embeddable Widget

One <script> tag embeds a floating chat button on any website. Configurable color, position, and bot name.

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Self-hosted bot

You host the bot logic. cachly provides the backend. No vendor lock-in for your business logic.

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Bring your own LLM key

Supply your OpenAI API key. cachly doesn't proxy LLM calls — you have full cost control.

Embed on any website

Add a floating chat widget to any website with a single <script> tag. No iframe. No React. No build step.

Minimal — 1 line

<script src="https://bot.cachly.dev/widget.js"></script>

Custom color & position

<script
  src="https://bot.cachly.dev/widget.js"
  data-color="#7c3aed"
  data-position="left"
  data-name="My Bot"
></script>

Supported data-* attributes: data-color, data-name, data-position (right|left), data-bot-id

Environment variables

Variable	Required	Description
CACHLY_URL	Yes	Redis/Valkey connection URL from your cachly instance dashboard
OPENAI_API_KEY	Recommended	Your OpenAI API key. Without it, the bot uses rule-based FAQ matching.
BOT_NAME	No	Display name of the bot (default: Support Agent)
BOT_PERSONA_ROLE	No	Role description used in system prompt
BOT_PERSONA_TONE	No	Tone: friendly, professional, warm, etc.
BOT_LLM_MODEL	No	OpenAI model (default: gpt-4o-mini)
BOT_SYSTEM_PROMPT	No	Full system prompt override
BOT_TEMPERATURE	No	Sampling temperature 0.0–1.0 (default: 0.3)
BOT_MAX_TOKENS	No	Max tokens per response (default: 512)
PORT	No	HTTP port (default: 3003)

Deploy targets

🐳

Docker

Recommended

docker compose up -d

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Railway

1-click

railway up

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Vercel

Serverless

vercel deploy

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Ready to build your bot?

Open the Bot Builder in your dashboard. Your first bot takes less than 5 minutes.

🤖 Open Bot Builder