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.

Semantic Cache

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

GDPR-compliant

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

Embeddable Widget

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

Self-hosted bot

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

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

Railway

1-click

railway up

Vercel

Serverless

vercel deploy

Ready to build your bot?

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

Open Bot Builder