Definition
Churn is the enemy of SaaS growth. High churn means you're constantly replacing lost customers just to stay flat. GitDealFlow's engineering data can reveal product quality issues: rising commit velocity but also rising churn suggests the team is shipping features customers don't want.
How it works in practice
Churn rate is the percentage of customers who stop paying within a given period. Logo churn counts customers lost; revenue churn weights each loss by the revenue attached to it. Both matter: a startup can lose a handful of small accounts and barely move revenue, or lose one large account and lose a fifth of its MRR overnight.
The honest way to read churn is by cohort. New customers typically churn at higher rates early in their lifecycle, so a young, fast-growing company will naturally show higher logo churn than a mature one, even if its product is better. Founders should slice churn by plan, channel, and account age before reacting to the headline number. The math also compounds: roughly 3% monthly churn compounds to about a third of customers lost over a year.
Because churn data is private, investors look for leading indicators in public signals. GitDealFlow reads the public GitHub activity of 350+ startups and tracks commit velocity, contributor growth, and repository expansion. A team that keeps shipping rapidly while customers leave is likely building features nobody asked for; a repo going quiet during a churn spike can signal a product in trouble.
Key points
- Logo churn = customers lost divided by customers at the start of the period; revenue churn weights losses by recurring revenue.
- Monthly churn compounds: small monthly numbers become large annual losses.
- Churn concentrates in early cohorts, so read it by cohort, plan, and channel.
- Churn is the denominator of LTV, small changes swing payback and lifetime value.
- Investors weigh retention before growth: a leaky bucket caps what growth can achieve.
Frequently Asked Questions
What's a healthy churn rate?
Monthly logo churn: 2-5% is average, <2% is excellent. Revenue churn should be lower than logo churn (large customers churn less). Annual churn: <10% is excellent.
What's the difference between logo churn and revenue churn?
Logo churn counts the percentage of customers who cancel, while revenue churn measures the percentage of recurring revenue lost. They diverge whenever the customers leaving are not representative of the base, for example, many small accounts cancelling while the large accounts stay, or the reverse. SaaS boards track both, and investors typically ask for the revenue figure because it drives the financial model.
How do you calculate churn rate?
Divide the number of customers who cancelled during a period by the number at the start of that period, then multiply by 100. Be consistent about the period: a 3% monthly figure is not comparable to a 3% annual figure. For revenue churn, do the same with monthly recurring revenue instead of customer counts.
Why is churn the most important SaaS metric?
Because growth adds customers at the front door while churn removes them at the back. If churn is high, the sales team must run harder just to stay flat, acquisition spend buys less net new revenue, and LTV falls below what the economics can support. Sustainable SaaS companies fix retention before scaling spend.