Phoebe

Phoebe is a London-based technology company developing an AI agent platform described as an "immune system" for software. Founded in 2024 by Matt Henderson (CEO) and James Summerfield, the platform is designed to automate software reliability by proactively identifying and resolving issues before they impact users. The founders, who previously served as CEO and CIO of Stripe Europe respectively, sold their first startup, Rangespan, to Google in 2014. Their experience with the challenges of maintaining large-scale software systems at companies like Stripe, Google, and Amazon motivated them to create Phoebe.

The company's core product utilizes swarms of AI agents to continuously monitor live system data from various sources like logs, traces, and commits. These agents can diagnose emerging problems, identify root causes, and automatically generate code or infrastructure changes to preemptively fix them. This approach aims to significantly reduce incident resolution time—by up to 90% according to the company—and minimize the 30% of time developers reportedly spend on bug fixes. By automating these processes, Phoebe allows engineering teams to move from a reactive incident management cycle to a model of AI-assisted resilience.

Phoebe launched publicly in August 2025 after securing $17 million in seed funding in a round co-led by GV (formerly Google Ventures) and Cherry Ventures. The platform serves clients in sectors such as fintech, digital commerce, and SaaS, with early customers including Trainline and PPRO. The business model is focused on providing its platform to enterprises where system uptime is critical, including e-commerce, logistics, and healthcare. The platform integrates with existing observability tools in a vendor-agnostic, read-only manner, allowing engineering teams to maintain control while benefiting from automated diagnostics and remediation.

Keywords: AI agents, software reliability, incident response, proactive monitoring, downtime prevention, code remediation, agentic AI, tech stack data, automated troubleshooting, software immune system, production monitoring, bug fixing, system resilience, observability, GV, Cherry Ventures, Matt Henderson, James Summerfield, Trainline, PPRO