Chronosphere

Chronosphere's origin traces to Uber, where co-founders Martin Mao and Rob Skillington — who had previously worked together at Microsoft on Office 365 — joined the infrastructure organization and confronted a monitoring crisis: as Uber's microservices architecture exploded in scale, no open-source or commercial metrics system could keep up with the cardinality and volume of time-series data Uber was generating. Mao and Skillington built M3, a distributed metrics platform, to solve the problem internally, and Uber later open-sourced M3 to the community. Recognizing that other cloud-native, containerized enterprises faced the same scaling wall, the pair left Uber in 2019 to found Chronosphere, launching publicly on November 5, 2019 with an $11 million Series A led by Greylock (with Lux Capital and investor Lee Fixel participating). The company's first product was a hosted, managed version of M3 designed to strip away the operational complexity of running the open-source system at scale.

Chronosphere grew quickly through the pandemic-era cloud/DevOps boom. A $43.4 million Series B closed in January 2021 (Greylock, Lux Capital, Lee Fixel, plus new investor General Atlantic), by which point the company had grown from 13 to 50 employees and expanded operations across Seattle, New York, and Lithuania. Nine months later, in October 2021, Chronosphere raised a $200 million Series C led by General Atlantic (with Addition, Greylock, Lux Capital, and Founders Fund participating) at a valuation over $1 billion, achieving unicorn status roughly two and a half years after founding while adding distributed tracing to its platform. Growth continued into 2022-2023: Chronosphere reported tripling both ARR and headcount in the twelve months to September 2022, and in January 2023 closed a $115 million extension to the Series C (led by GV and Geodesic Capital, with Addition, Founders Fund, General Atlantic, Greylock, Glynn Capital, and Lux Capital) at a $1.6 billion valuation. Chronosphere separately took in a $5 million strategic investment from the CrowdStrike Falcon Fund (at the same ~$1.6B valuation), deepening a security/observability partnership later referenced in Crunchbase's record of a fifth funding round.

Product-wise, Chronosphere evolved from a pure metrics platform into a full observability suite — adding distributed tracing (2021), logs, events/change tracking, SLO management, and 'Chronosphere Lens' for unified incident response. A pivotal move came in January 2024 with the acquisition of Calyptia, the company founded by the creators of the open-source Fluent Bit/Fluentd ecosystem; Chronosphere relaunched Calyptia's technology as the standalone Chronosphere Telemetry Pipeline, letting customers collect, filter, and route observability and security data from any source to any destination and cut low-value data volumes by roughly 89% on average. The company continued to rack up industry recognition, becoming a Leader in the Gartner Magic Quadrant for Observability Platforms for 2024 and again in 2025 (its second consecutive year), earning strong 'Voice of the Customer' ratings, and in late 2025 launching AI-guided/differential-diagnosis troubleshooting capabilities aimed at the emerging agentic-AI operations market. Fiscal 2025 (ended January 31, 2025) brought 78% YoY growth in new-business ARR and a 50% increase in customers spending over $1 million in ARR annually, with marquee customers including DoorDash, Zillow, Visa, Robinhood, Genius Sports, Tecton, Obsidian Security, and Astronomer.

Business model

B2B SaaS; cloud-native observability platform (metrics, traces, logs, events) plus a standalone Telemetry Pipeline product (built on open-source Fluent Bit/Calyptia), sold primarily to large enterprises and cloud/AI-native companies via direct enterprise sales and cloud marketplace/ISV partnerships (e.g., AWS, Google Cloud).

Recurring subscription revenue, typically consumption/volume-based on telemetry data ingested and retained; reported by the company as Annual Recurring Revenue (ARR), disclosed at over $160 million as of end of September 2025 with triple-digit YoY growth.