Head-to-head
Totally Lean vs LeanSpark
LeanSpark is the current name for LeanCanvas.com / Leanstack.
Same Lean Canvas framework, two very different products. Totally Lean runs entirely in your browser with no account, no server, and free AI features that edit what you wrote. LeanSpark is ash maurya's ai-first lean canvas tool.
The short answer
The short answer
- Pick Totally Lean if
- You want to sketch a business model tonight, without a signup flow between you and the canvas.
- Pick LeanSpark if
- You want the canonical app from the framework's creator.
Feature-by-feature
All claims about LeanSpark are drawn from their public site as of . Disclosure: Totally Lean is our product — competitor rows are cross-checked against leanspark.ai.
| Feature | Totally Lean | LeanSpark |
|---|---|---|
| Free forever (every feature) | Yes. Yes | Partial. Partial Free tier exists; paid tiers are advertised but not priced on the landing page |
| Requires an account to start | No. No | Yes. Yes |
| Canvas stored in your browser (not a server) | Yes. Yes | No. No Cloud-hosted — account-backed |
| Share via URL — recipient needs no account | Yes. Yes | Not documented. Not documented |
| Local AI rewrites a single field you wrote | Yes. Yes Four styles, runs in your browser | No. No |
| Local AI writes a 90-second pitch from your canvas | Yes. Yes Five tones, 90-second spoken pitch | No. No |
| Cloud AI drafts the canvas from a prompt | No. No By design — AI edits what you wrote, it doesn't write for you | Yes. Yes AI interviews you and auto-fills the canvas |
| Read-aloud / text-to-speech | Yes. Yes Browser voice + optional local Kokoro upgrade | No. No |
| Thread tagging across sections | Yes. Yes | No. No |
| Item-to-item links | Yes. Yes | No. No |
| Weighted Sankey flow diagram | Yes. Yes | No. No |
| Four views (Doc / Grid / Flow / Canvas) | Yes. Yes | No. No |
| Validation markers (assumption / validated / invalidated) | Yes. Yes | Yes. Yes |
| Version history | Yes. Yes Up to 20 snapshots per canvas | Not documented. Not documented |
| Real-time multi-user editing | No. No Async via URL share; no real-time co-edit | Not documented. Not documented |
| Team accounts with permissions | No. No | Not documented. Not documented |
| Built-in coaching / mentor network | No. No | Yes. Yes Running Lean methodology ecosystem |
| PNG export | Yes. Yes | Not documented. Not documented |
| PDF export | Partial. Partial Via browser Print → Save as PDF | Not documented. Not documented |
| JSON export + import round-trip | Yes. Yes | Not documented. Not documented |
| Works offline after first load | Yes. Yes | Not documented. Not documented |
| Pricing | Free forever Free forever. Every feature. No paid tier, no trial, no 'contact sales.' | Not published Free tier with 'no credit card required' is advertised on the homepage; paid tier pricing is not published on the landing page as of 2026-04-23. Verify current pricing on leanspark.ai before relying on this. |
Where Totally Lean wins
No account — open the URL, you're editing.
Your canvas never touches a server.
AI runs in your browser; nothing sent to a third party.
One-URL sharing — recipient needs no account to view.
Four views over one dataset: Doc, Grid, Flow (Sankey), Canvas.
Free forever. Every feature. Every version.
Where LeanSpark wins
Honest list. If your use case maps to any of these, their product fits better than ours.
Built by Ash Maurya, who created the Lean Canvas framework.
AI-first workflow: describe your idea in plain English, watch the canvas populate.
Paired with the Running Lean methodology and mentor network.
Stress-tests assumptions across seven named dimensions (Clarity, Desirability, Viability, Feasibility, Defensibility, Mission, Timing).
When to pick which
Pick Totally Lean if…
- You want to sketch a business model tonight, without a signup flow between you and the canvas.
- Your early hypotheses shouldn't sit on a third party's server.
- You want AI help on your canvas — but the AI should edit what you wrote, not write for you.
- You share canvases with people who shouldn't have to install or sign up for anything.
- You want the Sankey flow, threads, and weighted validation without paying.
Pick LeanSpark if…
- You want the canonical app from the framework's creator.
- You want the AI to draft the first version of your canvas from a prompt, not edit what you wrote.
- You're working with a Running Lean coach and want tight tool-method alignment.
- You're comfortable with your canvas living on a third-party server.
Methodology & sources
- What was compared
- Feature availability on the public product, pricing on the public pricing page, and data-handling claims published by the vendor. Features marked as local ai rewrites a single field you wroteor similar are treated as “yes” only when the vendor documents them publicly; unverified items show as “not documented.”
- What was tested
- Totally Lean: the author uses and maintains it. LeanSpark: observed from the public marketing site and documentation. We did not test paid tiers or private team features.
- Sources
- Totally Lean: https://leancanvas.online
- LeanSpark: https://leanspark.ai/leancanvas (checked )
- Conflicts of interest
- Totally Lean is our product. Competitor strengths are named honestly above. No ratings are fabricated and no reviews are aggregated.
You don’t need a seat license to test an idea.
Open Totally Lean, pick a template or start blank. Nothing to install. Nothing to sign up for. If it doesn’t click, close the tab.