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NeuronFeed

Sierra · Series C

Conversational AI agents for every business

Amount

$350M

Round

Series C

Valuation

$10B

Announced

Sep 2025

Investors

Lead investor

Greenoaks

Notes

$350M at $10B — Greenoaks led

Other Sierra rounds

Date Round Amount
May 2026 Series D $950M Details →
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 →