Stack AI

No-code AI app builder — create LLM workflows, chatbots, and document processors visually.

4.2/5Editor's ScoreHow we scoreOur editorial team evaluates each tool based on real user feedback from Reddit, Trustpilot, G2, and Product Hunt, combined with our assessment of feature quality, value for money, and performance vs. competitors.

Freemium — $0/moUpdated Feb 21, 2026

What is Stack AI?

Stack AI is a no-code platform that enables teams to build and deploy AI-powered applications using a visual workflow builder without writing any code. Users connect pre-built nodes for LLM calls, document parsing, database queries, API integrations, and conditional logic to create sophisticated AI workflows like chatbots, document processors, email responders, and data extraction pipelines. The platform supports multiple LLM providers including OpenAI, Anthropic, and open-source models, giving users flexibility in cost and capability. With enterprise features like SSO, audit logs, and on-premise deployment options, Stack AI serves both startups prototyping AI features and enterprises deploying production AI workflows.

Key Features

Visual drag-and-drop AI workflow builder

Support for multiple LLM providers (OpenAI, Anthropic, open-source)

Pre-built templates for chatbots, document processing, and more

Document parsing with OCR and structured data extraction

API deployment for embedding AI workflows in existing apps

Vector database integration for RAG applications

Enterprise SSO, audit logs, and on-premise deployment

Webhook triggers and scheduled automation

✓ Pros

Fastest path from AI concept to deployed application without code
Multi-LLM support avoids vendor lock-in and enables cost optimization
Pre-built templates accelerate common use case development
Enterprise-ready with SOC 2 compliance and deployment flexibility

✗ Cons

Complex workflows can become visually cluttered and hard to debug
Per-execution pricing can escalate quickly at high volumes
Limited customization compared to code-first AI frameworks

Frequently Asked Questions

How much does Stack AI cost?

Stack AI uses a freemium pricing model starting from $0/mo.

Is Stack AI worth it?

Stack AI has an Editor's Score of 4.2/5 on ToolPilot. Key strengths include fastest path from ai concept to deployed application without code. However, complex workflows can become visually cluttered and hard to debug.