Siena — Cosign

Siena AI provides AI agents for commerce that combine empathy with automation for customer service, shopping, reviews, and quality assurance.

Jobs

See all jobs for Siena here.

Enterprise Account ExecutiveGTMNorth America - East Coast · United States · Toronto · Toronto, Ontario, Canada · New York · New York, New York, United States · North America - West Coast · Remote · FullTimeView Job

Founding Creative DirectorMarketingLondon · London, London, United Kingdom · United Kingdom · London, United Kingdom · New York · New York, New York, United States · Remote · FullTimeView Job

Strategic Account Manager (UK)Account ManagementLondon · London, London, United Kingdom · United Kingdom · London, United Kingdom · Remote · FullTimeView Job

Product Manager, Agent PlatformProductRemote - Europe · United Kingdom · Lisbon · Portugal · Finland · Helsinki, Finland · Romania · New York · New York, New York, United States · London · London, London, United Kingdom · Spain · Remote · FullTimeView Job

Founding Content StrategistMarketingUnited Kingdom · London, United Kingdom · North America - East Coast · United States · London · London, London, United Kingdom · Remote · FullTimeView Job

All 14 jobs

Funding

All fundraising announcements are based on public sources. Please contact Cosign if you believe there are any discrepancies, or claim the profile to edit.

Leads

Participating Firms

Angels

Oct 2026Series A

$17M

Led by York IE

With Joyance Partners Sierra Ventures SuperAngel.Fund

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