Respan Secures $5M Seed Round Led by Gradient Ventures for Proactive AI Agent Observability

Respan, the proactive observability platform for AI agents, announced today it has raised $5M in seed funding. The round was led by Gradient Ventures, Google's AI-focused venture fund, with participation from Y Combinator, Hat-Trick Capital, and several strategic investors. This capital injection marks a major milestone for the startup as it aims to redefine how developers monitor and fix autonomous AI systems.

Modern AI development has shifted from simple single-turn models to complex agents that chain multiple tools and manage long-running sessions. These systems often fail in ways that traditional backward-looking logging tools cannot catch until a user reports an error. Respan addresses this by closing the loop between production monitoring and automated iteration through a model-agnostic platform.

The platform allows teams to monitor traces across providers, evaluate output quality continuously, and detect regressions before they impact the end-user experience. Unlike retrospective dashboards, the software features an automated evaluation agent. This tool analyzes failures to find root causes for specific agent decisions and recommends prompt optimizations or new evaluation parameters automatically.

The company has seen explosive growth, reporting an 8x year-over-year revenue increase in 2025. It currently processes over 1 billion logs and 2 trillion tokens per month for more than 100 startups and enterprise teams. Notable customers like Retell AI and Apten rely on the platform to scale their agentic workflows safely while maintaining high reliability.

Founded by UIUC alumni Andy Li and Raymond, the company recently rebranded from Keywords AI to better reflect its focus on request spans. The team was part of the Y Combinator Winter 2024 batch and now supports over 6 million end users. This rebranding aligns with their mission to provide the atomic infrastructure for the next generation of AI software. With the new funding, Respan plans to scale its engineering efforts and fortify its infrastructure. The technical roadmap is focused on developing deeper evaluation frameworks and smarter alerting systems. As AI agents become foundational to business operations, Respan is positioning itself to be the essential tool that ensures these agents break less and ship faster.