Lightbulb · FAQ

Lightbulb — frequently asked questions

Everything people ask about Lightbulb (lightbulb.wtf), the free AI business-plan generator.

What is Lightbulb.wtf?

Lightbulb (lightbulb.wtf) is a free AI business-plan generator. You type a one-line business idea and it produces a one-page plan in about a minute: a summary of market, model, customer and risk, a comparison with a well-known company, and a nine-section business canvas naming real organisations to contact.

Is Lightbulb free?

Yes — the core plan generator is free and produces one complete one-page plan per day, with no account needed. Paid tiers exist for people who want more: Canvas (£5/month) makes the plan editable, and Momentum (+£7.50/month) adds a weekly AI-guided action plan.

How does the AI business plan generator work?

Lightbulb sends your idea to Anthropic's Claude AI with a structured planning framework. The AI drafts the summary, finds the closest well-known comparable business, and fills a nine-section business model canvas with real, linked organisations, tools and communities relevant to your idea and location.

Do I need an account to use Lightbulb?

No account is needed to generate and read your first plan. You only need a free account to save plans across devices, share a plan as a public link, or compare several ideas side by side.

What's included in the one-page plan?

Each plan includes a suggested business name, four summary sections (Market, Business Model, Customer, Risk) with strength and weakness tags, a viability read with the biggest risks, a comparison chart against one named company, and a nine-section business model canvas with suggested first actions for each entry.

What does the Canvas tier add?

Canvas (£5/month) turns your one-page plan into an editable working plan. You can rewrite any section in your own words, ask for fresh AI suggestions that keep your edits, buy top-up action packs when you need more AI usage, and track your progress through the canvas.

What is Momentum?

Momentum is a £7.50/month add-on to Canvas (so £12.50/month in total) focused on doing rather than planning. Each week it gives you three ordered actions, one specific person to meet, a drafted outreach message and a four-week roadmap, then reviews your actual activity and adjusts the next week's suggestions.

Lightbulb vs writing a business plan myself?

Writing a plan yourself usually means a blank page and generic templates. Lightbulb gives you a structured, honest starting point in a minute — including a named comparable company and real organisations to contact — which you can then edit, challenge and act on rather than starting from zero.

Can I share my Lightbulb plan?

Yes. With a free account you can publish any plan as a public, read-only page at lightbulb.wtf/plan/your-plan — useful for sending to co-founders, mentors or potential partners without giving them edit access.

Which AI does Lightbulb use?

Lightbulb uses Anthropic's Claude models: a larger model for generating plans and a lighter one for quick tasks like naming. Generated content is validated against a strict structure before it is shown, so plans always arrive complete.

Who is behind Lightbulb and how do I contact them?

Lightbulb is an independent product for first-time founders, run from lightbulb.wtf. You can contact the team at admin@l-i-g-h-t-b-u-l-b.com — including for partnership enquiries from incubators and founder-support organisations (see lightbulb.wtf/for-partners).