Stack AI is worth it for enterprises and teams that need a no-code, drag-and-drop platform to ship compliant AI agents fast. It's best at document-heavy workflows, security, and governance, with SOC 2, HIPAA, and VPC/on-prem options. It falls short for solo developers and hobbyists: there's no affordable mid-tier, so you jump from a limited free plan straight to custom enterprise pricing.
What is Stack AI?
Stack AI is a no-code platform for building LLM-powered applications and agents, including document assistants, chatbots, and internal tools. It provides a visual builder to connect models, data sources, and logic, with an emphasis on enterprise use cases. It is oriented toward teams that want to ship AI apps and agents without a full engineering effort.
Best for
Teams building LLM apps, document assistants, and internal AI tools without heavy engineering.
Not for
Solo developers or small teams wanting an affordable, self-serve paid plan.
Strengths
- Visual builder aimed at LLM apps and agents, not just app plumbing
- Connects models with data sources for retrieval-style workflows
- Good fit for document assistants and internal knowledge tools
- Enterprise-oriented features around deployment and access
- Reduces the engineering lift to ship an AI application
Limitations
- More focused on AI apps than broad app-to-app automation
- Fewer general-purpose connectors than mainstream automation tools
- Aimed higher up-market, which can affect fit for solo users
Stack AI pricing
Freemium with usage-based 'runs per month' on a free tier, then custom enterprise quotes; no published paid self-serve tier.
| Plan | Price | What you get |
|---|---|---|
| Free | $0/mo | 500 runs/month, 2 projects, 1 member, community support |
| Enterprise | Custom | Custom runs and seats, dedicated engineers, VPC/on-prem, SOC 2/HIPAA/GDPR |
Pricing reflects public plans as of May 20, 2026 and can change. Check Stack AI for the latest.
Stack AI FAQ
How much does Stack AI cost?
Stack AI has a free tier with 500 runs per month, 2 projects, and one member. Beyond that, pricing is custom enterprise-only, quoted based on runs, seats, and deployment needs like VPC or on-premises, so you'll need to contact sales.
Stack AI vs Dify: which should I pick?
Choose Stack AI for enterprise security, compliance certifications, and no-code agent building. Choose Dify if you want an open-source, self-hostable platform with transparent, affordable paid tiers and strong RAG tooling for developers and smaller teams.
Can Stack AI build AI agents?
Yes. Stack AI is built around deploying AI agents at scale using a drag-and-drop, no-code builder. It targets document processing, retrieval, and workflow automation, with enterprise controls for secure, compliant agent deployments in regulated environments.
Does Stack AI offer on-premises deployment?
Yes, on its Enterprise plan. Stack AI supports VPC and on-premises deployment plus compliance certifications including SOC 2, HIPAA, and GDPR, which is why it appeals to regulated industries and larger organizations rather than individual users.
Is there a free version of Stack AI?
Yes. The free plan includes 500 runs per month, 2 projects, one team member, and community support. It's enough to evaluate the platform, but production scale requires a custom enterprise agreement.
Looking at alternatives? Stack AI is a fit when the goal is to build and deploy an LLM application, like a document assistant or internal chatbot. Autonoly is less about building an app and more about getting recurring tasks done, so if you want scheduled agents that run digital work rather than an AI product to ship, Autonoly is the closer match. See the Autonoly review.