Deploy Flowise on Render: Free AI Agent Hosting Guide

Your Flowise AI agent can run on Render at zero cost. Follow this lean tutorial to get a production‑ready instance without a DevOps team.

Why Render Beats DIY Servers for Free Hosting

Render offers a free‑tier web service with automatic TLS and continuous deploys. No VMs, no hidden charges, and a single GitHub connection.

Prerequisites – What You Need Before Starting

• A GitHub repo containing your Flowise project (or fork the official repo).
• Render account (free signup).
• Docker installed locally for testing (optional).

Step‑by‑Step Deployment

1. Create a render.yaml at the repo root with the exact content below.
2. Push the file to GitHub; Render will auto‑detect the service.
3. Configure environment variables in the Render dashboard (see copy box).
4. Trigger the first deploy and watch the logs.
5. Visit the generated HTTPS URL – your Flowise UI is live.

Copy This Configuration

services:
  - type: web
    name: flowise
    env: docker
    plan: free
    branch: main
    dockerfilePath: Dockerfile
    autoDeploy: true
    envVars:
      - key: DATABASE_URL
        value: postgres://user:pass@postgres.render.com:5432/flowise
      - key: NODE_ENV
        value: production

Dockerfile – Minimal Image for Render

# Use official Node LTS image
FROM node:20-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
RUN npm run build

# Production stage
FROM node:20-alpine
WORKDIR /app
COPY --from=builder /app/dist ./dist
COPY package*.json ./
RUN npm ci --only=production
EXPOSE 3000
CMD ["node", "dist/index.js"]

Environment Variables Explained

• DATABASE_URL – Render provides a free Postgres instance; link it here.
• NODE_ENV=production – Optimizes Flowise performance.
• Optional: OPENAI_API_KEY for LLM access.

Common Pitfalls and Quick Fixes

• Deploy fails with “port not exposed”. Ensure EXPOSE 3000 is present in Dockerfile.
• Env var missing error. Double‑check spelling in Render’s dashboard.
• Free tier hit CPU limit. Reduce concurrent requests or enable auto‑scaling (paid).

FAQ

Can I host multiple Flowise instances on Render’s free tier?

Yes, but each consumes a separate free web service slot; you’re limited to three free services per account.

Do I need to manage SSL certificates?

Render automatically provisions and renews TLS for every web service.

Is the free tier sufficient for production traffic?

For low‑volume internal tools or demos, the free tier handles dozens of requests per minute without throttling.

How do I update Flowise after a new release?

Merge the upstream repo or pull the latest Docker image tag, then push a commit; Render redeploys automatically.

Can I connect a custom domain?

Custom domains are supported on the free tier; just add the DNS record in Render’s UI.

Bottom Line

Render gives you a zero‑cost, fully managed environment for Flowise. With a single render.yaml and Dockerfile, you avoid server hacks and focus on building agents.

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