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Backend Workflows for the AI Age

Write workflows. Watch them run. Ship to production.

Hot Dashboard - Stream Graph showing event execution

How It Works

1

Install Hot

Mac, Windows, Linux

terminal 
curl -sSL https://hot.dev/install.sh | sh

Or download install packages at hot.dev/downloads coming soon

2

Initialize a new Hot project

Add to any existing codebase

terminal 
cd dev/so-fire-backend/
hot init so-fire

Creates a .hot data directory, hot/src source directory, and hot.hot configuration file

3

Write some Hot code

in hot/src

hot/src/so-fire/user.hot 
$ns ::so-fire::user

send-welcome-email
#{"on-event": "user:created",
  "doc": "Send a welcome email to the user after created"}
fn (event) {
    ::resend::emails/post-emails(
        SendEmailRequest({
            "from": "hello@we-are-so-fire.com",
            "to": event.data.user.email,
            "subject": "Welcome to SoFire!",
            "html": "<p>Welcome to SoFire!</p>"
        })
    )
}
4

Run the dev servers

App, API, Scheduler, Worker — all in one command

terminal 
hot dev
5

Watch your workflow running

Real-time observability in the Hot App

Inspect

  • • Event Data
  • • Run Results
  • • Function Call Timeline & Return Values

Trace

Follow execution across multiple Events and Runs

Files

View files created by your code

Debug

See Run failures and cancellations

Screenshots coming soon!

6

Deploy to Hot Cloud

Optional — when you're ready to go live

terminal 
hot deploy

The Hot Dev Platform

Simple and powerful from local development to production

Hot Language & Runtime

Purpose-built language for backend workflows with JS-compatible data literals and optional typing for great API developer experience.

Web Dashboard & Monitoring

Inspect event data, trace execution across runs, view generated files, and debug failures—all in real-time.

Workers & Scheduling

Background job processing with queues, event handlers, and scheduling built in.

Hot Packages

Pre-built integrations for SaaS and AI services. Easily build your own public or private packages.

REST API

Easily integrate Hot workflows with your own backend services via OpenAPI-compatible REST endpoints.

VS Code & LSP

First-class editor support with syntax highlighting, autocomplete, and inline diagnostics.

Connect Your Services

Pre-built integrations for the tools you use

OpenAI OpenAI
Anthropic Anthropic
X/Grok Grok
AWS AWS
Stripe Stripe
GitHub GitHub
Resend Resend
Postmark Postmark
Twilio Twilio
SendGrid SendGrid
Slack Slack
PostgreSQL PostgreSQL
Redis Redis
MongoDB MongoDB
Supabase Supabase
Shopify Shopify
HubSpot HubSpot
Salesforce Salesforce
Airtable Airtable
Notion Notion

... and many more coming soon

Plans for Growth

From local development to production

Hot Free

Local Dev

  • Hot language runtime & CLI
  • Background workers, event processing, and scheduling
  • Web dashboard & monitoring
  • Multiple projects
  • Hot packages for service integration
  • VS Code extension & LSP support
  • Great documentation

Frictionless local development

Hot Cloud

Paid Plans

  • Everything in Hot Free
  • Managed infrastructure
  • Multiple environments
  • Single-command deployment
  • REST API access
  • Multiple Teams and Users

Starter & Pro plans available

Self-Hosted

Custom

  • Deploy on your infrastructure
  • Full platform control
  • Unlimited runs & team size
  • Commercial license
  • Priority support & SLA

For enterprise deployments