1. Integration Capabilities: Alerta is primarily designed for alert management and deduplication, providing integrations with various monitoring tools such as Nagios, Prometheus, and Grafana to centralize and streamline alerts. On the other hand, Jaeger focuses on distributed tracing, enabling developers to monitor and troubleshoot the flow of requests through complex systems by tracing the path of requests across multiple services in real-time.

2. Monitoring Scope: Alerta primarily focuses on monitoring and managing alerts generated by different monitoring tools, consolidating them into a single platform for easy management and analysis. In contrast, Jaeger is specifically tailored for tracing the flow of requests in distributed systems, offering in-depth insights into the performance of individual services and their interactions.

3. Visualization and Analysis: Alerta provides visualizations and analytics related to alerts, offering insights into the frequency of alerts, trends, and patterns that can help in proactively addressing issues. Jaeger, on the other hand, specializes in visualizing trace data, providing detailed information about the latency and performance of requests as they propagate through various services.

4. Open Source Ecosystem: Alerta is an open-source alert management tool that can be easily customized and extended to fit the needs of different organizations, fostering community-driven development and collaboration. In contrast, Jaeger is part of the Cloud Native Computing Foundation (CNCF) and has a strong ecosystem with robust support from industry leaders like Uber, allowing for continuous enhancements and advancements.

5. Use Cases: Alerta is best suited for DevOps teams and IT operations that need a centralized platform for managing alerts efficiently, enabling timely responses to incidents and proactive monitoring of infrastructure. Jaeger, on the other hand, caters more to developers and SREs working on microservices architectures, providing insights into the performance of distributed systems and facilitating troubleshooting of complex issues.

6. Scalability and Performance: Alerta is designed to handle a high volume of alerts and notifications efficiently, offering scalability features that ensure it can cater to the alerting needs of large-scale enterprise environments. Jaeger, on the other hand, focuses on distributed tracing at scale, providing mechanisms to handle the tracing of requests across numerous services without compromising performance.

In Summary, Alerta specializes in alert management and integration capabilities, while Jaeger focuses on distributed tracing for monitoring the flow of requests in complex systems.