Monthly Active Users
The number of unique users who engage with a product at least once within a 30-day period, measuring product reach and engagement.
Monthly Active Users (MAU) is a product engagement metric counting the number of unique users who perform at least one qualifying action within an application or platform during a rolling 30-day period. It is the primary scale metric for consumer and B2C platforms, used to demonstrate market penetration, engagement health, and advertising inventory potential.
The definition of 'active' varies by product and must be carefully defined: for a messaging app, any message sent counts; for a professional tool, logging in alone might qualify; for a fintech app, making a transaction or checking a balance may be the threshold. Inconsistent or inflated definitions of 'active' are a source of metric manipulation that investors and analysts must scrutinize.
MAU is one of the metrics the SEC requires public social media and platform companies to disclose quarterly, making it a regulated reporting metric for Facebook (Meta), Twitter, Snapchat, and others. For advertising-supported businesses, MAU × ARPU (advertising revenue per user) directly drives revenue.
MAU-related metrics: DAU/MAU ratio (Daily Active Users divided by Monthly Active Users, often called 'stickiness' or 'engagement rate') — above 20% is considered strong for consumer apps; above 50% indicates a daily habit product. Snapchat and WhatsApp achieve 60%+ DAU/MAU; email apps may achieve 80%+ for heavy professional users.
For B2B SaaS products, MAU is less primary than ARR or seat count — a professional tool used intensively by 50 users within a company may generate more revenue than a consumer app with 500,000 casual monthly users. B2B SaaS companies often report 'active users' or 'seats used' rather than MAU in isolation.
MAU growth rate (month-over-month or year-over-year) is a leading indicator of long-term revenue potential — flat or declining MAU typically precedes revenue stagnation for advertising or freemium monetization models.
FAQs
What is the difference between MAU and registered users?
Registered users (or total accounts) count everyone who has ever created an account — including dormant users who signed up years ago and never returned. MAU counts only users who took a qualifying action in the last 30 days, making it a meaningful measure of current engagement. MAU/Registered Users gives the engagement rate of the total user base. Reporting registered users as a proxy for active engagement is misleading.
How is MAU used in valuing consumer tech companies?
Consumer tech companies are often valued on Price/MAU or EV/MAU multiples, particularly before profitability. Historical acquisition multiples: Instagram was acquired at ~$33/MAU, WhatsApp at ~$42/MAU, LinkedIn at ~$60/MAU. These multiples reflect expected future ARPU generation and strategic value. MAU quality (engagement depth, demographic composition, geographic distribution) matters as much as raw count.
What causes MAU to spike without being a meaningful signal?
MAU spikes from viral marketing campaigns, press coverage, or app store featuring events may not reflect sustainable engagement — users are attracted by novelty but don't form habits. These 'hollow MAU' cohorts have high early churn. Analyze MAU cohort retention (what % of new users from a given month are still active in month 3?) to distinguish genuine engagement growth from marketing-driven inflations.
Related Terms
Daily Active Users
The number of unique users who engage with a product on a given day, measuring habit formation and the depth of daily engagement.
Engagement Score
Composite metric quantifying how actively a customer uses a product, predicting retention and expansion.
Activation Rate
Percentage of new users who complete a key action that predicts long-term retention.
Virality Coefficient
Average number of new users each existing user generates through referrals or organic sharing.
