RunStack
RunStack - Build, test, and run LLM workflows — visually. | Product Hunt

LLM workflows,
without orchestration code.

Design workflows visually. Run them via a simple API.

Works with:
OpenAI
Gemini
Anthropic
Grok
Mistral
DeepSeek
Workflow Preview

Prospecting Workflow Demo

Hover nodes to see prompts & outputs

Press enter or space to select a node.You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.
Scroll away to exit

Why RunStack?

LLM orchestration doesn't scale in code.

Building production LLM systems in code becomes brittle fast.

Without RunStack

Orchestration in code

Every prompt change requires redeploy

Testing variants means branching production code

Choosing the best model requires code changes.

Result: Fragile & slow

With RunStack

Visual orchestration

Design workflows visually, no code changes

Update prompts and models instantly

Test variants side-by-side before shipping

Execute via simple API with only 2 endpoints

Minutes instead of days to ship

Result: Fast & reliable

One requires constant maintenance. The other ships faster.

Features

Everything you need to run LLM workflows

From visual design to execution, built for iteration.

Visual workflow builder

Design, edit, and run LLM workflows without touching production code.

Press enter or space to select a node.You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.
Safe iteration
Deploy version in 2 clicks.
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Variants by default
Test prompts and models side-by-side.

Variant 1

Take every entries from `${{stage1}}`and provide basic company info: industry and 2 talking points.

gemini-2.5-flash

Variant 2

For each prospect in `${{stage1}}`, provide detailed company info: industry, size, and 3 specific talking points with data.

claude-3.5-sonnet

OpenAI
Anthropic
Mistral
Grok
Gemini
DeepSeek
Simple API
Execute workflows with only two endpoints.

Pricing

Simple, Transparent Pricing

Choose the plan that works for you All plans include access to our platform.

Free

€0/ month

Forever free

  • Build and edit workflows
  • Publish workflows
  • API access (limited)
  • 50 execution credits / month
  • 1 concurrent run
  • 1 API key
  • Rate limit: 1 req/sec

Get started with basic features

Popular

Starter

€29/ month

Billed monthly

  • Everything in Free
  • 1000 execution credits / month
  • 2 concurrent runs
  • 3 API keys
  • Rate limit: 3 req/sec

For individuals and small projects

Pro

€69/ month

Billed monthly

  • Everything in Starter
  • 3000 execution credits / month
  • 5 concurrent runs
  • 10 API keys
  • Rate limit: 10 req/sec

For professionals with custom models

Scale

€149/ month

Billed monthly

  • Everything in Pro
  • 8000 execution credits / month
  • 10 concurrent runs
  • 25 API keys
  • Rate limit: 30 req/sec

For teams with high volume needs

FAQ

FAQ

Common questions about RunStack

Focus on logic.
RunStack handles orchestration.

RunStack

© 2026 RunStack. LLM workflow orchestration.