Welcome to The Stack’s One To Watch. Every week we pick out a notable startup and go deep on what they’re building, why they’re building it, and the trials behind it all.
Observability tools are one of the hottest topics for companies managing AI models and agents running wild across their network, and after rising to prominence with its log analytics service, Boston-based Coralogix is one of many platforms pivoting to agentic AI.
Since launching in 2014, the company now has 600 employees across three continents and positions itself as a leader in autonomous, agentic AI observability, according to CEO Ariel Assaraf.
Earlier this month, the company raised a $200 million Series F round at a $1.6 billion valuation, a 60% increase on its $1 billion valuation Series E in June 2025.
Assaraf sat down with The Stack to share the Coralogix approach to cost efficiency, avoiding vendor lock-in strategies, and how the 11-year-old company, almost by accident, built a platform that applies observability principles to agentic AI.
