Elastic

Mezmo (formerly LogDNA) is a telemetry pipeline and log management platform for ingesting, parsing, enriching, and routing high-volume logs, metrics, and traces before they reach downstream storage or analytics. Data can be collected through Mezmo Edge, OpenTelemetry, or direct integrations, with pipeline controls that reduce downstream cost and improve query performance. It is HIPAA-compliant, delivered as SaaS, and oriented toward organizations managing large, cost-sensitive log streams.

Chronosphere is a cloud-native observability platform built for controlling the cost and volume of telemetry at large scale. Created by former Uber engineers behind the M3 metrics project, it spans metrics, traces, and logs, and pairs log management with a Telemetry Pipeline (based on Fluent Bit / Calyptia) that shapes and reduces data before it is stored. The product is a proprietary SaaS offering aimed at large enterprises and high-volume cloud-native environments rather than a self-hosted or open-source tool.

Grafana Loki is a horizontally scalable log aggregation system that indexes only metadata labels rather than full log content, keeping storage costs low by writing to object storage. It integrates tightly with Grafana dashboards and the broader LGTM stack (Loki, Grafana, Tempo, Mimir) for logs, metrics, and traces. Loki is free and open source for self-hosting, and is also available as a managed service through Grafana Cloud with a free tier and usage-based paid plans.