Customer Stories / Education

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Duolingo Amazon DynamoDB Case Study

Duolingo uses Amazon DynamoDB to store 31 billion items in support of an online learning site that delivers lessons for 80 languages. The U.S. startup reaches more than 18 million monthly users around the world who perform more than six billion exercises using the free Duolingo lessons. The company relies heavily on Amazon DynamoDB not just for its highly scalable database, but also for high performance that reaches 24,000 read units per second and 3,300 write units per second. In addition, Duolingo uses a range of other AWS services such as Amazon Elastic Compute Cloud (Amazon EC2) based on the latest Intel Xeon Processor Family, for compute Amazon ElastiCache to increase performance; Amazon Simple Storage Service (Amazon S3) for storing image-related data; and Amazon Relational Database Service (Amazon RDS) for permanent data storage. Moving forward, Duolingo plans on leveraging AWS Elastic Beanstalk and AWS Lambda for its microservices architecture, as well as Amazon Redshift for its data analytics.


We are grateful for all the work AWS has saved us. AWS has enabled us to focus on our mission, which is free language education for the world.”

Karin Tsai
Senior Software Engineer at Duolingo

AWS Services Used

Amazon DynamoDB

Amazon DynamoDB is a fast and flexible NoSQL database service for any scale.

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Amazon ElastiCache

Amazon ElastiCache is a serverless, Redis- and Memcached-compatible caching service delivering real-time, cost-optimized performance for modern applications.

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Amazon S3

Amazon Simple Storage Service (Amazon S3) is an object storage service offering industry-leading scalability, data availability, security, and performance.

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Amazon RDS

Amazon Relational Database Service (Amazon RDS) is a collection of managed services that makes it simple to set up, operate, and scale databases in the cloud. 

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