About Cairn
Software that does the work — and shows its work.
Cairn started in 2022, when our founders watched automation fail on every exception in the support and infrastructure teams they ran. We set out to build agents that operations teams could actually trust.
A cairn is a stack of stones that marks the trail for whoever comes next. Every run on Cairn leaves the same kind of marker: what happened, why it happened and who said yes.
62
people in four hubs
2,400+
companies running agents on Cairn
11M+
agent runs every month
$48M
raised from operators and funds
2022
Founded in San Francisco
Ines and Theo leave support and infrastructure roles to build agents that show their work.
2023
First agent in production
Meridian Freight puts an Exception Handler live after six weeks in shadow mode.
2024
Series A and London
We open our London office and ship approval gates, evals and the trace viewer.
2025
SOC 2 Type II
An independent audit, our 100th customer and a million agent runs a month.
2026
Cairn 3.0
Multi-agent handoffs and eval suites — and more than 11 million runs a month.
Ines Calloway
Co-founder & CEO
San Francisco
Theo Marchetti
Co-founder & CTO
San Francisco
Amara Osei
VP Engineering
San Francisco
Rhea Natarajan
Head of Agent Operations
London
Mateo Alvarez
VP Sales
New York
04 — BACKED BY
Funded by people who’ve run the work.
We’ve raised $48M from Northwind Ventures, Calder Partners and Field Fund, alongside angels who have led support, finance and infrastructure teams at public companies. They hold us to the same standard our customers do: show the numbers.
Northwind Ventures
SERIES B LEAD
Calder Partners
SERIES A LEAD
Field Fund
SEED