--- title: "How letgo is Using Amplitude to Fuel its Extraordinary Growth" description: "In addition to A/B test analysis, monitoring the performance of new features is an integral Amplitude use case." canonical: "https://amplitude.com/en-us/blog/letgo-amplitude-case-study" --- # How letgo is Using Amplitude to Fuel its Extraordinary Growth In addition to A/B test analysis, monitoring the performance of new features is an integral Amplitude use case. Source: https://amplitude.com/en-us/blog/letgo-amplitude-case-study --- [Cara Harshman](/blog/author/cara-harshman) [Former Managing Editor, Amplitude](/blog/author/cara-harshman) [](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Famplitude.com%2Fblog%2F%2Fblog%2Fletgo-amplitude-case-study)[](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Famplitude.com%2Fblog%2F%2Fblog%2Fletgo-amplitude-case-study)[](https://twitter.com/intent/tweet?url=https%3A%2F%2Famplitude.com%2Fblog%2F%2Fblog%2Fletgo-amplitude-case-study\&text=How%20letgo%20is%20Using%20Amplitude%20to%20Fuel%20its%20Extraordinary%20Growth)[](mailto:?subject=Checkout%20this%20Amplitude%20Article\&body=Check%20this%20out%3A%20https%3A%2F%2Famplitude.com%2Fblog%2F%2Fblog%2Fletgo-amplitude-case-study) Only two years old, [letgo](https://amplitude.com/resources/Amplitude-casestudy-Letgo.pdf) is already the biggest and fastest growing app to buy and sell locally in the US and other countries with over [75 million downloads, 200 million listings and 3 billion messages](https://www.businessinsider.com/letgo-app-buy-sell-used-items-online-2017-9) sent in its first two years. Its team moves quickly, so they needed an [A/B testing tool](https://amplitude.com/blog/ab-testing-tools) that could keep up with their rigorous [A/B testing](https://amplitude.com/blog/ab-testing) and analysis. Since letgo’s Business Intelligence team integrated Amplitude, analysis of A/B tests – once a cumbersome task – has become incredibly simple.\ \ Amplitude has helped letgo’s team release new features with confidence, track critical metrics and take more risks knowing that they can closely analyze everything they do in real time. ## A Daily Analytics Routine The first thing Iago Novoa does when he arrives at the office is check his team’s Amplitude dashboards. Iago, the Head of Business Intelligence at letgo, looks at key metrics such as daily active user levels. Amplitude has also become an essential part of letgo’s fast-pace product development process. ## A/B Testing Analysis With Amplitude Let’s say Iago wanted to analyze an A/B test he ran. Letgo sends the A/B test as a user property to Amplitude and has the ability to analyze anything they want about the A/B test. “In Amplitude, it’s just run and drop, anyone can do it. I can create graphs, I can segment, I can do whatever,” he said. ##### Download this case study as a PDF If Iago didn’t have the option to use Amplitude, he said analysis would be a very time consuming task involving going to the database, building queries and waiting for the query to find the result. So whether you need to segment by operating system, or by location within the United States, or whether you want to check the percentage of users taking a specific action “we send the A/B test as a user property and analyze anything you we need. “Grabbing the data and making sure you have it all ready to analyze is probably the worst part of analysis for BI people,” Iago added. “In Amplitude, you don’t need to waste time.” ## Measuring A New Feature In addition to A/B test analysis, monitoring the performance of new features is an integral Amplitude use case. “Every time we have a new release or we launch a new feature in the app, we wait for a period and run an analysis in Amplitude first,” Iago said. “We thoroughly test everything we do. [*Find more Amplitude customer stories here*](https://amplitude.com/behavioral-resources) About the author Cara Harshman Former Managing Editor, Amplitude [More from Cara](/blog/author/cara-harshman) Cara was formerly the Managing Editor at Amplitude. Before joining this crew of super-passionate, smart individuals, she wrote and spoke a lot about A/B testing and personalization at Optimizely. She has spoken at MozCon, CTA Conference, Opticon, and Learn Inbound. [More from Cara](/blog/author/cara-harshman) Topics #### Recommended Reading [Read ](/blog/holiday-checkout-friction) [Product](/blog/holiday-checkout-friction) ###### [Find Your Holiday Checkout Friction Before Peak Traffic Does](/blog/holiday-checkout-friction) [Oct 26, 2026](/blog/holiday-checkout-friction) [8 min read](/blog/holiday-checkout-friction) [Read ](/blog/amplitude-github-learning-loop) [Product](/blog/amplitude-github-learning-loop) ###### [Amplitude + GitHub Agents: Closing the Product Learning Loop](/blog/amplitude-github-learning-loop) [Oct 19, 2026](/blog/amplitude-github-learning-loop) [4 min read](/blog/amplitude-github-learning-loop) [Read ](/blog/lessons-from-consolidating-our-mcp-server) [Insights](/blog/lessons-from-consolidating-our-mcp-server) ###### [Lessons from consolidating our MCP server](/blog/lessons-from-consolidating-our-mcp-server) [Oct 6, 2026](/blog/lessons-from-consolidating-our-mcp-server) [10 min read](/blog/lessons-from-consolidating-our-mcp-server) [Read ](/blog/what-ai-engineers-do) [Insights](/blog/what-ai-engineers-do) ###### [What AI engineers do in the age of agentic code](/blog/what-ai-engineers-do) [Oct 1, 2026](/blog/what-ai-engineers-do) [14 min read](/blog/what-ai-engineers-do) #### Explore Related Content [101](/compare/top-feature-flag-solutions-for-product-teams) ###### [9 Top Feature Flag Solutions for Modern Product Teams in 2026](/compare/top-feature-flag-solutions-for-product-teams) [Jan 27, 2026](/compare/top-feature-flag-solutions-for-product-teams) [Integration](/blog/amplitude-hubspot-behavioral-analytics) ###### [Using behavioral analytics for growth with the Amplitude app on HubSpot](/blog/amplitude-hubspot-behavioral-analytics) [Jun 17, 2024](/blog/amplitude-hubspot-behavioral-analytics) [10 min read](/blog/amplitude-hubspot-behavioral-analytics) [Personalization](/blog/identity-resolution-insights) ###### [Identity resolution: The secret to a 360-degree customer view](/blog/identity-resolution-insights) [Feb 16, 2024](/blog/identity-resolution-insights) [10 min read](/blog/identity-resolution-insights) [Product](/blog/warehouse-native-technical-deep-dive) ###### [Inside warehouse-native Amplitude: A technical deep dive](/blog/warehouse-native-technical-deep-dive) [Jun 27, 2023](/blog/warehouse-native-technical-deep-dive) [15 min read](/blog/warehouse-native-technical-deep-dive) [Guide](/resources/boost-customer-engagement) ###### [5 Proven Strategies to Boost Customer Engagement](/resources/boost-customer-engagement) [Jul 12, 2023](/resources/boost-customer-engagement) [Video](/designing-high-impact-experiments) ###### [Designing High-Impact Experiments](/designing-high-impact-experiments) [May 13, 2024](/designing-high-impact-experiments) [Startup](/blog/direct-to-consumer-marketing-tactics) ###### [9 direct-to-consumer marketing tactics to accelerate ecommerce growth](/blog/direct-to-consumer-marketing-tactics) [Feb 20, 2024](/blog/direct-to-consumer-marketing-tactics) [10 min read](/blog/direct-to-consumer-marketing-tactics) [Growth](/blog/analytics-product-market-fit) ###### [Leveraging analytics to achieve product-market fit](/blog/analytics-product-market-fit) [Jul 20, 2023](/blog/analytics-product-market-fit) [10 min read](/blog/analytics-product-market-fit)