Mayfield

mayfield.com ↗Activity from announced rounds

Activity in this selectionsam-blond-d5ce34fa

Venture investor whose recorded companies include optical connectivity developer Lumilens and tax compliance software company Numeral.

From infrastructure to applications

Mayfield backs technology founders and describes an AI investment view spanning semiconductors and applications. In explaining its Lumilens investment, the firm points to a practical constraint on AI growth: moving data between processors and racks as clusters become larger. It sees optical connectivity as an essential infrastructure layer.

Activity represented here

Lumilens develops optical transceivers and near-package and co-packaged optics for AI systems. Numeral, also listed in Mayfield’s official portfolio, builds software for sales-tax compliance. They address different business needs within the recorded funding history. The deals below are the announcements available in RoundOS; Mayfield’s official portfolio is the source for its wider set of investments.

Sources
Rounds participated in
17
Confirmed lead rounds
1
14 roles undisclosed
New companies
14
First participation on record · 3 follow-on
Funding in participating rounds
$1.5B
15 disclosed · full round size, not this investor’s share

By stage

Series A7
Seed3
Series C+3
Undisclosed2
Pre-seed1
1 more
Series B1

By primary sector

Hardware7
AI6
Enterprise software2
Cybersecurity1
Robotics1

By country

United States17

Rounds

17 in this selection
Numeral

AI-powered software that automates sales tax and VAT compliance for global businesses.

$100MSeries C
Participant
Hello Haven

A personal AI assistant that remembers a user's preferences and helps manage everyday tasks through app, text, email or phone conversations.

$15MPre-Seed
Lead
Hang Ten Systems

Helps large enterprises build and run AI-native software using agentic code generation and domain expertise

$53MAdditional seed funding
Participant
Velaura AI

Develops ultra-low-power silicon for AI data centers and Physical AI systems

$110MSeries A
Role not disclosed
Lumilens

Builds optical interconnect technology connecting GPUs in AI data centers

>$700MSeries C
Role not disclosed
Bespoke Labs

Builds environments and infrastructure for reliable AI agents

$40MSeries A
Role not disclosed
Hang Ten Systems

Helps large enterprises build and run AI-native software using agentic code generation and domain expertise

$32MSeed
Role not disclosed
Upscale AI

Provides open-standard AI networking infrastructure for ultra-low-latency training and inference

$190MSeries A+
Role not disclosed
AttoTude

Pioneers ASIC over Dielectric interconnect for high-bandwidth, energy-efficient AI infrastructure connectivity

$52MSeries C
Role not disclosed
Exaforce

AI-native SOC platform using a real-time knowledge graph and Exabots to detect and respond to threats

$125MSeries B
Role not disclosed
OpenLight

Builds silicon photonics chips and PDK tools for AI, telecom, and quantum computing markets

$50MSeries A1
Role not disclosed
Upscale AI

Provides open-standard AI networking infrastructure for ultra-low-latency training and inference

UndisclosedUndisclosed
Role not disclosed
NeuBird AI

Builds agentic AI for enterprise IT operations that automates incident detection and root cause analysis

$19.3MUndisclosed
Role not disclosed
Cognichip

Develops Artificial Chip Intelligence (ACI) for semiconductor design

$60MSeries A
Role not disclosed
Rhoda AI

Builds robotic intelligence for real-world environments using video-predictive control

$450MSeries A
Role not disclosed
Kana

Builds agentic AI platform with customizable agents to automate marketing workflows audience targeting campaign optimization and data integration for marketers and media companies

$15MSeed
Role not disclosed
Upscale AI

Provides open-standard AI networking infrastructure for ultra-low-latency training and inference

$200MSeries A
Role not disclosed