comparethemarket.com, a leading UK price comparison service, has migrated to MongoDB to power its growing number of microservices. By embracing agile development methodologies, continuous delivery, open source technology, and cloud computing, the company aims to outpace competitors by delivering new applications and features faster, at higher quality and lower cost. comparethemarket.com uses MongoDB as its operational database across multiple microservices, leveraging its low friction for development, performance characteristics, and tuneable consistency with performance that meets their needs. The company has implemented a hybrid environment, with some services running in on-premises data centers and newer microservices deployed to Amazon Web Services. They use Docker containers to orchestrate their applications and MongoDB's Encrypted storage engine to further reduce security-related surface area. comparethemarket.com measures the impact of MongoDB on its business by focusing on speed, service quality, and continuous delivery, achieving significant improvements in time-to-market, service uptime, and operational efficiency. By adopting MongoDB Enterprise Advanced, they have access to operational automation, fine-grained monitoring, and direct support from MongoDB's engineering team. The company advises others to understand distributed system concepts and use tools like Ops Manager to simplify operations, while leveraging MongoDB's strengths to deliver business value through technology.