DynamoDB is a popular NoSQL database choice for mid-to-large enterprises, offering fast and flexible data model, reliable performance, and automatic scaling of throughput capacity. However, it may not be suitable for fast-growing geo-distributed apps with low latency reads due to its limitations in handling high data density, operational ease, and troubleshooting in production. Alternatives such as MongoDB, Apache Cassandra, and YugabyteDB offer better solutions for these use cases, with YugabyteDB being the ideal database to power fast-growing geo-distributed apps with low latency due to its massive scalability, low latency, and geo-distribution capabilities. Additionally, YugabyteDB offers 10x savings compared to DynamoDB in terms of cost and 3x development agility.