SubSutra connects to your Substack and automatically surfaces which posts drive growth, when your audience opens emails, and who's converting to paid — no spreadsheets required.
Subscribers
4,821
+312
Open Rate
38.4%
+2.1%
Free → Paid
1.8%
-0.3%
Top Grade
A+
94/100
Subscriber Growth
0
subscribers tracked
0%
avg open rate achieved
0
posts scored
V1 Features
Built specifically for creators with 100–50,000 subscribers who are serious about growth.
Every post graded A–F using open rate, CTR, subscriber gain, and restacks. Know exactly which posts resonated.
My Creator Journey
Opens 42% · +48 subs
10 Tools I Use Daily
Opens 39% · +31 subs
Hot Take on AI
Opens 31% · +12 subs
Quick Update
Opens 22% · +3 subs
Scoring Algorithm
Four signals, weighted to reflect what actually drives Substack growth. Not vanity metrics — subscriber impact.
RECENT POSTS · SORTED BY SCORE
My Creator Journey: Year 2
42% opens · +48 subs · 23 restacks
10 Tools Every Creator Needs
39% opens · +31 subs · 18 restacks
Why I Almost Quit Substack
36% opens · +27 subs · 31 restacks
Hot Take: AI is Overrated
31% opens · +12 subs · 9 restacks
Weekly Update #47
22% opens · +3 subs · 2 restacks
V2 and V3 ship within 8 weeks of launch
Pricing
14-day free trial, no credit card required.
Starter
$79/yr · saves 30%
For new and small creators getting started with data.
Growth
$249/yr · saves 30%
For active creators who want to grow and retain subscribers.
Pro
$499/yr · saves 30%
For full-time creators running Substack as a business.
Join creators who use SubSutra to grow faster, churn less, and make more — with data that Substack doesn't give you.
Get started freeNo credit card · 14-day trial · Cancel anytime