n8n Startup Plan Generator: OpenAI + Postgres + Notion

Turn a one-sentence startup idea into a complete plan—automatically

The n8n Startup Plan Generator: OpenAI + Postgres + Notion workflow collects a startup idea from an n8n Form, then uses OpenAI (plus SerpApi) to generate a full startup plan: PRD, personas, competitor insights, a PostgreSQL schema, and an OpenAPI spec—plus a live landing page and shareable deliverables in Notion, Google Drive, and more.

What this workflow does

• Captures your idea via an n8n Form trigger (one sentence).
• Expands into structured plan fields with OpenAI and performs web research using SerpApi, summarizing up to five competitors including pricing and features.
• Generates go-to-market foundations using OpenAI: target customer personas and a lean business model canvas informed by the idea + competitor context.
• Produces core product documentation: a Markdown PRD, PostgreSQL CREATE TABLE statements, and an OpenAPI 3.0 YAML specification.
• Creates a landing page: generates a single-file HTML landing page, publishes it to GitHub Gist, and generates a live preview URL using htmlpreview.github.io.
• Delivers launch-ready outputs: marketing copy, a launch checklist, an executive summary, and an estimated total OpenAI token cost.
• Exports and shares results to Google Drive, writes a structured tracker in Notion, logs a row in Google Sheets, and sends final links via Gmail and Slack (with error alerts to Telegram if the workflow fails).

Use cases

• Give SaaS founders a “plan generator” that turns ideas into PRDs, schemas, and specs.
• Help automation engineers demonstrate end-to-end n8n workflows: OpenAI research → databases → documentation → publishing.
• Rapidly compile competitor-aware startup strategy outputs for internal pitches or incubators.

Technical details

• Integrations/nodes: set, code, gmail, slack, notion, postgres
• AI & research: OpenAI + SerpApi
• Publishing: GitHub Gist + htmlpreview.github.io
• Collaboration & exports: Notion, Google Drive, Google Sheets
• Alerts: Telegram on workflow failure