Stack AI is listed under Workflow Automation, in the AI Agents & Automation category on Flocci AI Tools. Free plan: 500 monthly runs, 2 projects, 1 seat, community Discord support. It is freemium — a usable free tier with paid plans above it, and it lives at stackai.com.
Stack AI is freemium: there is a free tier you can work in and paid plans above it. It is one of 426 freemium tools in the catalog, all labelled the same way so you are never surprised by a paywall.
Stack AI works in a normal browser tab with no install. It is available on the web and an API.
Stack AI does 3 things the catalog singles out: Free plan: 500 monthly runs, 2 projects, 1 seat, community discord support; no-code drag-and-drop builder aimed at compliant/regulated enterprise deployments; soc 2, hipaa and gdpr compliance options at the enterprise tier.
Flowise is the closest free alternative: it sits in the same Workflow Automation sub-category and is free. Google Opal, LangBot and Langflow also start free. The full list is on the alternatives page.
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