Stack AI
A drag-and-drop builder for AI assistants that answer from your own documents, with the access controls an enterprise IT team asks for before letting one connect to real data.
What it costs
| Tier | Price | For | Includes |
|---|---|---|---|
| Free | $0/month | Testing whether the builder can do what you need before committing. | 500 runs per month, 2 projects, 1 seat, community Discord support. |
| Enterprise | Custom pricing | Organisations deploying assistants against real, sensitive company data. | Custom run volume, unlimited projects and seats, dedicated infrastructure, solution engineers, on-premises or VPC deployment, access control, SSO, and SOC 2, HIPAA and GDPR compliance. |
Read from Stack AI's own pricing page on 25 Sep 2026. Vendors change prices without notice.
Where it breaks
There's no mid-tier between Free and Enterprise on the current pricing page — a company that outgrows 500 runs a month goes straight into a sales conversation.
No-code visual builder; runs as a hosted platform or, on Enterprise, inside your own cloud environment.
First entry in this reference. There is no previous check to compare it against.
Stack AI sits in the same territory as tools like Make, but purpose-built for one job: wiring an AI assistant up to your own documents and letting non-developers assemble the logic with drag-and-drop blocks instead of code.
The free tier is real enough to build something with — 500 runs a month, two projects — which makes it a reasonable way to prototype an internal assistant before deciding whether it’s worth paying for. What’s missing is anything in between: there’s no $50 or $200 mid-tier plan published, just Free and a custom Enterprise quote.
Why the gap matters
That structure tells you who Stack AI is really selling to. The features that show up on the Enterprise tier — on-premises deployment, SOC 2 and HIPAA compliance, dedicated solution engineers — are the asks of a company connecting an assistant to genuinely sensitive data, not a solo builder automating a personal workflow. If your use case is small enough to live on the free tier, this is a good sandbox; if it grows past that, the next stop is a sales call, not a self-serve upgrade button.
Where it fits next to the alternatives
Against a general agent platform, Stack AI’s differentiator is the compliance posture available on paper — VPC deployment and audit-ready certifications matter to a regulated buyer in a way they don’t to someone automating a side project, which is exactly the gap between its Free and Enterprise tiers.
Get Stack AI
Buying the tool is not the hard part.
The ebook is about what to hand over, in what order, and how you find out when it goes wrong. One payment, no subscription.