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WhittleOS vs Stacktree

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

WhittleOS compared with Stacktree
DetailWhittleOS logo WhittleOSStacktree logo Stacktree
What it doesA startup decision engine for solo founders that kills weak ideas before they waste your months Send client work as a link, not an attachment
StageNot given Not given
FoundedNot given Not given
Based inNot given GB
Pricing modelPaid Freemium
PricingStarter: $19 (2 credits); Founder Discovery Pass: $49 (6 credits); Multi-Market: $99 (15 credits); Working Founder: $149 (30 credits). Credits never expire. New accounts receive 2 free credits for any run except Discovery. Free: 3 pages; Solo: $19/month (25 pages, 1 custom domain, 1 client space); Studio: $79/month (unlimited pages, 10 custom domains, 10 client spaces); Firm: $249/month (unlimited pages, 25 custom domains, unlimited client spaces); Enterprise: billed annually, custom pricing.
Key features
  • 12 deal-breaker checks for evaluating ideas
  • Market discovery with live searches across real sources
  • Whittle Score ranked 0–100 from fixed rubric computed in code
  • Build it / Test it first / Drop it verdict with reasons
  • Evidence linked to source pages or marked not verified
  • Up to 5 ranked idea candidates per Discovery run
  • Deep-dive modules: Kill My Idea, Pricing Power, Support Burden, Platform Risk, Pivot Wedge
  • Prepaid credits with no expiration
  • Free founder profile read and 2 free credits on signup
  • Async-only validation with no customer calls required
  • Replace pages in place without changing the URL
  • Works with ChatGPT, Claude, and other AI agents
  • Client spaces with dedicated portals per client
  • Passcode and email domain gates
  • Custom domains on your agency's domain
  • Version history with rollback capability
What makes it different
  • No subscription or sales calls—pay per decision with credits that never expire
  • Half of published pages change after being sent, so replace-in-place saves resending
  • Works as an MCP server with Claude, ChatGPT and other agents
  • Agency-focused with dedicated client portals and multiple custom domains
  • Analytics show engagement depth, not just opens
Community votes00
DR (Domain Rating by Ahrefs)4 +1 (up) since last check53 no change since last check
Trust Flow (Majestic)189
Citation Flow (Majestic)2434
Referring domains (Majestic)51245

5 details filled in for both companies.

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