StackStats vs Chartsy

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

StackStats compared with Chartsy
Detail	StackStats	Chartsy
What it does	Advanced analytics for Substack writers that runs locally without cloud or subscription	Revenue analytics for SaaS founders
Stage	Not given	Startup
Founded	Not given	2024
Based in	Not given	AL
Pricing model	Paid	Free trial
Pricing	1-Year License: $39 USD (1 device, 1 year of updates, app yours forever after update period). Lifetime License: $79 USD early adopter price (up to 3 devices, every future update forever). After 1-year period, renewal available for $29/yr or no renewal required—app continues working permanently.	Starter from $9/mo to $99/mo (priced by monthly tracked events from 10,000 to 2M events), and Growth from $29/mo to $189/mo. Annual billing available with roughly two months free. 14-day free trial with no credit card required.
Key features	Subscriber engagement segments identifying Champions, Loyalists, At-Risk, and Ghosts Churn risk scoring for each subscriber on a 0–100 scale Cohort retention analysis tracking last 12 cohorts 90-day subscriber growth forecast Best day and hour to post determined from your own data Superfan and power user identification Open rate decay tracking Geographic audience breakdown by country and US state Content-to-growth correlation analysis 100% local data processing with no cloud or server	Revenue attribution by marketing channel with first-touch and last-touch tracking MRR, ARR, churn, LTV and cohort retention computed from invoices Natural language queries with AI-generated charts Custom dashboards and templates Daily Briefing and Weekly Email Report Website tracking with visitor and signup data Revenue segmentation by plan, tag and custom field GDPR Mode with no customer PII storage Read-only API access to payment platforms Chartsy MCP server for AI client integration
What makes it different	Runs entirely locally on your machine with no cloud server or account required One-time payment model with no recurring subscription charges Auto-Sync functionality for one-click Substack data download without manual CSV exports	Priced by tracked events rather than revenue, so costs stay flat whether your MRR is $10k or $1M Revenue metrics computed from actual invoices, not subscription estimates, so all adjustments land correctly Joins billing and traffic data so marketing is measured by paid customers and retained revenue, not just signups Native integration with both Paddle Billing and Paddle Classic
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	17 +4 (up) since last check	31 −2 (down) since last check
Trust Flow (Majestic)	8	9
Citation Flow (Majestic)	19	30
Referring domains (Majestic)	29	122

5 details filled in for both companies.

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