Respan provides observability, evaluation, and gateway infrastructure for teams shipping multi-step AI agents, combining production tracing, logs, metrics, dashboards, alerts, automated evaluations, prompt experiments, dataset workflows, and routing across model providers. The platform is designed to help teams trace agent behavior, run offline and online evaluations, catch regressions, and optimize prompts and models over time. Respan reports more than 100 customers, processes over 1 billion logs and 2 trillion tokens per month, supports over 6.5 million end users, and achieved 8x year-over-year revenue growth in 2025. The company originated as Keywords AI focused on dynamic LLM routing, joined YC W24, and rebranded as Respan after shifting to observability and evaluations. Near-term plans emphasize scaling the team and investing in infrastructure, reliability, performance, and security. Longer-term, Respan aims to build self-driving observability that can identify issues, generate evaluations, suggest fixes, and prevent regressions before they reach users.

Total raised

$6M

Funding rounds

2

Latest round

Seed

Latest activity

Mar 2026