A no-code platform to build and deploy LLM workflows and assistants for business. Visual LLM workflow builder Read our hands-on review and compare the top

Overview

Stack AI is an agents, productivity tool designed to help users accomplish specific tasks more efficiently. You can access it at https://www.stack-ai.com. Users typically choose this tool because it excels at “Visual LLM workflow builder”; it excels at “Document and data connectors”. However, be aware that less customizable than code.

Key Features

  • Visual workflow builder — automates multi-step task execution.
  • Data source connectors — can work autonomously toward a goal.
  • API and chat deploy — connects multiple tools in a pipeline.
  • Usage monitoring — automates multi-step task execution.

Pricing

PlanPriceFor
Free$0Try users
ProcustomTeams

Pricing is subject to change. Check the official website for current plans and regional discounts. Free tiers often have usage limits — evaluate whether those limits match your expected volume before committing.

Comparison

vs. Dify: Evaluate both tools on output quality, pricing, ease of use, and how well each fits your specific agents-related workflow.

vs. Agentgpt: Evaluate both tools on output quality, pricing, ease of use, and how well each fits your specific agents-related workflow.

Getting Started

  • Visit https://www.stack-ai.com and sign up for the free tier if available — test the core workflow before committing to a paid plan.
  • Spend 10–15 minutes exploring the interface and pre-built templates — familiarity with the tool’s layout pays off quickly.
  • Connect or integrate Stack AI with your existing tools and workflows where possible — standalone use underestimates its value.

Hands-on Verdict

Stack AI is the no-code platform I use to build LLM workflows and assistants with a visual builder — connect models, data, and tools, then ship an API. It’s more builder-complete than Gumloop on ops and a friendlier start than Dify. For agents I use Dify.

Who it’s for: ops, founders. Tip: prototype the flow visually, then expose it as an API — Stack AI’s strength is shipping, so build once and call it from wherever you need.

Compare alternatives

Side-by-side with the 2 closest alternatives.

ToolCategoryPricingVisit
Stack AI (this) agents, productivityFree $0 Site ↗
Difyagents, productivityFrom $0/mo Site ↗
AgentGPTagentsFree $0 · From $40/mo Site ↗
Stack AI Current

A no-code platform to build and deploy LLM workflows and assistants for business. Visual LLM workflow builder Read our hands-on review and compare the top

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Open-source LLM app and agent platform with a visual workflow canvas, RAG pipelines, and one-click cloud or self-hosted deployment.

agentsproductivity
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Browser-based tool to configure and deploy autonomous agents in seconds. No-code autonomous agents in browser Read our hands-on review and compare the top

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Editor’s Review
3.9/5
Pros
  • +Visual LLM workflow builder
  • +Document and data connectors
  • +Deployment as API or chat
Cons
  • Less customizable than code
  • Enterprise sales model

A clean way for teams to ship internal AI tools. The connectors reduce plumbing work.

See all reviews →

Last updated: 2026-07-31

When to use it

  • Use it when you need visual LLM workflow builder
  • Use it when you need document and data connectors
  • Use it when you need deployment as API or chat

When to skip it

  • Avoid it if less customizable than code
  • Avoid it if enterprise sales model

Alternatives to consider