The retention intelligence layer for subscription brands
We turn every cancellation into a personalized experience that keeps your best customers.
a16z speedrun · Portfolio Company
The Problem
Subscription brands lose 75% of subscribers within 3 months
$450B
lost annually to subscription churn globally
5–7×
more expensive to acquire a new customer than retain one
83%
of churned users would have stayed with a better experience
Product — Prosumer
Retention intelligence inside your existing tools
📊
Embeds directly into Salesforce, Intercom, or any CRM — complete customer context in a single view
⚠️
Detects passive churn from activity signals — surfaces at-risk users before they reach the cancel button
💬
Real-time Slack alerts notify your team the moment a customer needs attention
✅
Generates specific next actions for each customer — what to do, when, and why it will work
🔔
Passive churn risk — Sarah K. hasn't logged in for 12 days. Usage dropped 80%. Recommended action: personal outreach.
#sirius-alerts · just now
Salesforce — Sirius Panel
Retention
All Accounts
Health Scores
At Risk (7)
Tasks
Reports
SK
Sarah Kowalski
Pro Plan · $2,400/yr · Member since Mar '25
High churn risk — 87% probability in next 14 days
↓ 80%
Usage trend
12 days
Last active
3 / 12
Features used
$28.8K
Lifetime value
Sirius recommended action
Schedule a 15-min personalized onboarding for features she hasn't discovered. Users with similar profiles retained at 92% after guided sessions.
Execute Action →
Product — Consumer
A personalized retention experience for every user who cancels
🔌
Single iframe integration — deploys into any cancellation flow in minutes
🧠
Reads the user's full profile from your data warehouse in real time — usage patterns, behavior, preferences
🎯
Identifies the precise reason and the right response — a tailored plan, a feature they missed, or a graceful pause
✨
Every interaction is unique to that user, that moment — generated by the engine, informed by every prior outcome
Real example: A user subscribed to a mentor at $10K/mo. New price is now $60K/mo. They want to pause for 2 months. Sirius recommends keeping the subscription — because coming back would cost 6× more.
POWERED BY SIRIUS
Before you go…
We'd love to understand why. What's your main reason?
🎯 It doesn't fit my needs right now
🕐 I'm not using it enough
🔄 Looking for something different
✦ Generated for this user
Your personalized plan is ready.We adjusted your features and content based on your usage. This plan is built around how you work — so it fits.
Think of every retention approach as a slot machine. We try each one, track what paid out, and let the winners rise to the top.
🎰
Test everything, measure everything
Different offer, different message, different timing — every variation is tracked. Did they stay? For how long? How much value did they generate?
🏆
Best performers rise, new ones compete
Proven approaches run on most users. A portion always goes to new experiments — so we keep finding what works even better.
🌐
Learnings compound across all brands
What works on one brand trains the engine for every brand. More brands, more data, faster improvement — for everyone on the platform.
$3MARR
75%MoM Growth
196%NRR
Customers
Designing solutions with
Vision — Platform
Hyper-personalization across every lifecycle stage
🛡️
Today — Retention. We operate at the most data-rich moment in the customer journey. Every cancellation teaches the engine what each user segment values.
🚀
Next — Full lifecycle. The same engine expands to onboarding, activation, upsell, and re-engagement — applying what it already knows about each user to every touchpoint.
🏆
How we grow. Each new lifecycle stage multiplies the value we deliver per brand and deepens the data that makes the engine sharper for all.
One engine serving consumer and prosumer brands. Retention is the entry point — the full lifecycle is the product.
Vision — Marketplace
The consumer marketplace for digital experiences
Our retention engine processes millions of user decisions across consumer and prosumer brands. That data creates the foundation for a marketplace that matches people to the digital services that fit them.
👤
We already know the user. Preferences, behavior patterns, and intent — captured across every brand on the platform.
🏪
Personalized product matching. When a user outgrows one service, we connect them to the one that fits — powered by real usage data, not reviews.
📈
How we capture the opportunity. Every cancellation across every brand flows through our engine. The consumer app monetizes the other side of that same interaction.
The retention platform builds the intelligence. The marketplace captures the value.
Sirius — For You
👤
Welcome back, Alex
Based on your preferences & history
Matched for you
🎬
Mubi — Curated cinema that fits your taste
97% match based on your viewing history
📝
Coda — Flexible docs for your workflow
94% match · fits how you use docs
🎧
Endel — Focus sounds personalized to you
91% match · based on your usage patterns
Vision
The flywheel that creates infinite growth
Sirius
🛡️
Retention Platform
Lifecycle intelligence for consumer and prosumer subscription brands — deeper data with every interaction
👤
Consumer Marketplace
Matching users to the right digital products and services — powered by real usage data across the network
User insights flow down ↓
Better data flows up ↑
More brands → richer data → smarter engine → better consumer matching → more brands join.
Each side accelerates the other. Compounding growth.
Azamat
CEO
Built consumer AI product, 0→5M users in 4 months. First-ever acquisition in Telegram.
Telegram
Benazir
CTO
Built Alibaba's recommendation engine. 500M+ daily active users. Full CS scholarship at 15.
Telegram
