Which AWS service offers machine learning capabilities to developers?

Amazon SageMaker is the service that offers comprehensive machine learning capabilities to developers. It provides a fully managed environment for building, training, and deploying machine learning models at scale. With SageMaker, developers can access a wide range of tools and algorithms that simplify the ML workflow, including data preparation, model training, and deployment processes.

SageMaker allows users to train models quickly using built-in algorithms or their own custom algorithms, provides features for hyperparameter tuning, and integrates well with other AWS services for a streamlined machine learning experience. This makes it an essential tool for developers looking to leverage machine learning in their applications.

While other services like Amazon Rekognition, Amazon Comprehend, and Amazon Lex also offer machine learning capabilities, they are specialized for specific tasks such as image analysis, natural language processing, and conversational AI, respectively. In contrast, SageMaker is designed as a broader, end-to-end machine learning platform, making it the most suitable option for developers looking to harness machine learning capabilities across various projects.