Sierra · Series C

Conversational AI agents for every business

Amount

$350M

Round

Series C

Valuation

$10B

Announced

Sep 2025

Notes

$350M at $10B — Greenoaks led

Other Sierra rounds

Date	Round	Amount
Sep 2025	Series c	$350M	Details →
Oct 2024	Series b	$175M	Details →
Oct 2024	Series b	$175M	Details →
Feb 2024	Series a	$110M	Details →
Feb 2024	Series A	$110M	Details →