Last9 is a unified observability company that helps engineering and DevOps teams monitor high-cardinality metrics, logs, and traces without the ballooning costs of legacy tools. Built around a Prometheus- and OpenTelemetry-compatible telemetry warehouse called Levitate and a pre-ingestion Control Plane that filters, reshapes, and routes data, Last9 has been used to observe some of the largest live-streaming events in the world - including peaks of roughly 59-61 million concurrent viewers. Founded in 2020 and backed by Sequoia/Peak XV's Surge, Better Capital and others, it targets cost-efficient, full-fidelity observability at enterprise scale.
Observe is an AI-powered observability platform that unifies logs, metrics, and traces into a single streaming data lake built on Snowflake. The company helps enterprises troubleshoot distributed applications 3x faster at one-third the cost of traditional monitoring tools. Founded in 2017 by veterans from Splunk, Wavefront, and Snowflake, Observe was acquired by Snowflake in January 2026 for approximately $1 billion after raising over $665 million in funding.