# Topic: Retention > Making the habit stick — retention, churn, cohorts, and engagement loops. - 21 entries - [Customer Acquisition and Retention: How to Balance Both](https://www.productgrowth.blog/p/customer-acquisition-and-retention) (Jun 28, 2026) — Customer acquisition and retention are one growth system, not a tradeoff. Here is how the two compare, where they meet in the LTV:CAC ratio, and how to balance them as you scale. - [Customer Retention Metrics: The 12 That Matter Most](https://www.productgrowth.blog/p/customer-retention-metrics) (Jun 28, 2026) — Customer retention metrics, defined and benchmarked: retention rate, churn, NRR, stickiness, activation, NPS and more, with the good SaaS number for each and which one to track first. - [Customer Retention Strategies That Move the Number](https://www.productgrowth.blog/p/customer-retention-strategies) (Jun 27, 2026) — Customer retention strategies that move the number: nail activation, build a habit loop, cut time-to-value, run lifecycle and win-back, and expand the accounts you keep. - [What Is Customer Retention (and Why It Decides Growth)](https://www.productgrowth.blog/p/customer-retention) (Jun 27, 2026) — Customer retention is the percentage of customers a business keeps over a period. Here is the definition, the formula, why it beats acquisition, and how to measure it. - [The AI SDR Playbook: What Actually Works in 2026](https://www.productgrowth.blog/p/the-ai-sdr-playbook-what-actually-works) (Mar 30, 2026) — 50-70% of companies churn off AI SDR tools before renewal. Learn the decision framework, real costs ($35K-$65K/yr), and hybrid model that drives 2.3x more revenue. - [How Gamma Turned a 95% Drop-Off into $100M ARR](https://www.productgrowth.blog/p/gamma-growth-teardown-100m-arr) (Feb 28, 2026) — Gamma went from 95% drop-off and 60K users to $100M ARR, 70M users, and a $2.1B valuation with just 50 employees. Discover the 5 growth strategies — AI activation, viral architecture, micro-influencer marketing, positioning, and anti-blitzscale discipline — behind one of the most capital-efficient comebacks in AI. - [Churn Rate](https://www.productgrowth.blog/calculators/churn-rate) — Calculate churn rate as customers lost divided by customers at the start of a period. Run your own numbers, then check them against real monthly churn benchmarks by industry, from Recurly, ChartMogul, and Optifai. - [Hacking Growth with GPT-5](https://www.productgrowth.blog/p/gpt-5-and-growth-hacking) (Aug 11, 2025) — turn gpt-5 into an always-on growth engine: measurable, repeatable, fast. Agent-first GPT-5 growth for marketers: build reliable AI workflows for research, programmatic SEO and onboarding that cut CAC and lift activation & NRR. - [How Duolingo Hooks Users?](https://www.productgrowth.blog/p/how-duolingo-hooks-users) (Sep 2, 2024) — How Duolingo's Strategies Turn Language Learning into an Addictive Daily Habit and What Startups Can Learn from It. Lessons in Engagement and Retention. - [Engagement Rate](https://www.productgrowth.blog/calculators/engagement-rate) — Engagement rate is the share of your audience that actively interacts in a period: engaged users divided by total users or reach, times 100. Run your own numbers, then check them against real engagement benchmarks by industry from Mixpanel, Pendo, and Userpilot. - [Cohort Analysis](https://www.productgrowth.blog/tools/cohort-analysis) — Cohort analysis groups users by a shared start point, usually their signup month, then tracks the percentage of each group still active over time. Use the calculator above to project a retention curve from your cohort size, month 1 retention, and the rate it flattens to. - [Daily Active Users (DAU)](https://www.productgrowth.blog/calculators/daily-active-users-dau) — Daily Active Users (DAU) is the count of unique people who do something meaningful in your product on a given day. Use the calculator to get your DAU/MAU stickiness, see what counts as a good ratio by industry, and read the formula with a worked example. - [Monthly Recurring Revenue (MRR)](https://www.productgrowth.blog/calculators/monthly-recurring-revenue-mrr) — Calculate Monthly Recurring Revenue (MRR) as new plus expansion minus churned MRR, then track month-over-month growth. Run your own numbers and check them against real MoM MRR growth benchmarks by industry, from the 2025 SaaS Benchmarks report, SaaS Capital, and Stripe. - [Net Promoter Score (NPS)](https://www.productgrowth.blog/calculators/net-promoter-score-nps) — NPS (Net Promoter Score) is the percentage of promoters minus the percentage of detractors on a 0 to 10 recommend question, scored from -100 to 100. Calculate yours, then check it against real SaaS, fintech, and e-commerce benchmarks. - [Expansion Revenue](https://www.productgrowth.blog/calculators/net-revenue-retention) — Expansion revenue is the extra recurring revenue existing customers add through upgrades, more seats, and usage. Calculate it, then judge it in context with net revenue retention against real benchmarks by industry from Benchmarkit, Optifai, ICONIQ, and ChartMogul. - [Customer Lifetime Value (LTV)](https://www.productgrowth.blog/calculators/customer-lifetime-value-ltv) — Customer lifetime value (LTV) is the total gross profit one customer generates before they churn. Run the formula, see a worked example, and compare against SaaS benchmarks by industry. - [Retention Rate](https://www.productgrowth.blog/calculators/retention-rate) — Retention rate is the percentage of customers you keep over a period: (customers at the end minus new ones acquired) divided by customers at the start. Run your own numbers, then check them against real annual retention benchmarks by industry from First Page Sage, ChartMogul, and KeyBanc. - [User Behavior Analytics: A Guide to Understanding and Optimizing Customer Journeys](https://www.productgrowth.blog/p/user-behavior-analytics-a-guide-to-understanding-and-optimizing-customer-journeys) (Jul 3, 2023) — Discover how understanding and analyzing user behavior can transform your business. Learn about key metrics, essential tools like real-time session recordings and Google Analytics, and strategies to improve user engagement and website interaction. Elevate your user experience today. - [Product Market Fit: Everything You Need To Know.](https://www.productgrowth.blog/p/product-market-fit-everything-you-need-to-know) (Jun 28, 2023) — Unlock the Secrets to Product-Market Fit: Learn how to navigate the challenges, identify your target market, measure user engagement, and more. Gain expert insights for startup success. - [Product Growth: Leveraging Product Metrics, Cohorts, and Counter-Metrics for Sustainable Success](https://www.productgrowth.blog/p/product-growth-leveraging-product-metrics-cohorts-and-counter-metrics-for-sustainable-success) (May 20, 2023) — Ever wondered what lies at the heart of your favorite app's success? - [Exploring the Rise of Product-Led Growth: A Brief History and Methodology](https://www.productgrowth.blog/p/exploring-the-rise-of-product-led-growth-a-brief-history-and-methodology) (Apr 8, 2023) — Learn about Product-Led Growth, a business growth methodology where the product sits at the center of all activities in an organization, including acquisition, retention, and expansion. Follow its history from door-to-door sales to automation of sales and social media and discover how product-led growth works, how companies use free or freemium models, and why it creates a viral effect. --- All posts: https://www.productgrowth.blog/archive · Site: https://www.productgrowth.blog