What Is Monthly Active Users (MAU)?
Monthly Active Users is the standard measure of your product's engaged user base — the denominator for engagement ratios and a key input to SaaS health metrics.
Key Takeaways
- MAU counts unique users who perform a meaningful action at least once in a 30-day window
- MAU is the base for stickiness (DAU/MAU) and per-user revenue metrics
- Growing seats but flat or declining MAU signals adoption problems
- Track MAU per account for B2B, not just in aggregate
What MAU measures
Monthly Active Users (MAU) counts the number of unique users who perform at least one meaningful action within a rolling 30-day period. Like DAU, the 'meaningful' threshold should reflect core product usage, not idle visits. MAU is the broadest engagement measure in your product analytics stack — it tells you how large your genuinely active user base is within the subscription you have sold. For B2B SaaS, the gap between licensed seats and MAU is a critical adoption metric.
MAU vs licensed seats
In B2B SaaS, customers buy seats but not all users activate. A customer with 50 licensed seats and 15 MAU has only 30% seat activation. Low seat activation is a strong predictor of churn and downgrade at renewal — the economic buyer sees 70% of their purchase unused and questions renewal. Tracking MAU against licensed seats per account and building activation campaigns for dormant users is one of the highest-ROI activities a customer success team can run.
Using MAU in ratio metrics
MAU is the denominator in several important derived metrics: DAU/MAU (stickiness), revenue per MAU (ARPU on an engaged-user basis), and support tickets per MAU (efficiency). These ratios are more informative than raw MAU alone. Revenue per MAU declining while MAU grows can signal that new users are from lower-value segments. Support tickets per MAU increasing signals product quality or onboarding problems. MAU as a base number enables these comparisons across periods and cohorts.
Improving MAU
MAU growth comes from two sources: acquiring more users (new customers, seat expansion) and converting licensed or registered users into active ones. The second lever is often overlooked. An onboarding email sequence that guides newly invited users to their first meaningful action, in-app tutorials at first login, and manager-facing reports that show team adoption (creating peer accountability) are all effective at lifting MAU without acquiring a single new customer. For most SaaS businesses, improving activation of existing users delivers faster MAU growth than acquisition alone.