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Density (company)

Density (company)

Density is a San Francisco-based company building a people-counting system to measure the number of people in or passing through a physical space such as a hallway, lobby, or conference hall.

Density is a developer of door sensors and room sensors that are designed to measure how people use space in real time without invading privacy. The company's proprietary depth sensors and deep learning algorithms accurately and anonymously count people in real time. Density suggests the measuring technology can help design and manage spaces used by people to be more inclusive and sustainable. Density's sensors do not use cameras, in order to avoid capturing personal identifiable information; they are purpose-built for measuring how people use spaces.


The company uses sensors to generate anonymous depth data to help users see and understand space usage at scale and in real time. The sensors work to generate enough data to make sense of human behavior in a space, without generating enough data to be able to identify individuals. And the sensors are designed to be secure and protect data as it is transmitted to users.


Density's OpenArea sensor works to help understand how people use open space. The sensor can be installed up to 20 feet from the ground to understand more than 1,325 square feet of space. This sensor is intended to offer greater range and greater coverage than camera-based alternatives.


The Entry sensor is Density's original sensor. It is threshold-based and able to measure the number of people coming in and out of a space. Density can monitor a floor and room-sized area (depending on location and distribution) and smaller sizes, such as desks.


Using data generated from the company's sensors, Density's software solutions offer users a chance to monitor different spaces, including floors and rooms, and give users an understanding of the utilization of the space.


The Workspace software offered by Density allows users to manage desk configurations, so workspaces can be assigned or reserved by users or teams. Users can create floor plans with landmarks, such as hand sanitizer stations or printers, and assign amenities so employees can book based on needs or preferences, such as monitors and standing desks. The software can integrate with existing applications, such as Slack.

The Workspace software is intended to be used for safely reopening business after the COVID-19 epidemic, including through the implementation and adjustment of team protocols. This can be used to automate social distancing and help businesses stay in compliance and build in daily health checks, which can also be adapted as needed.


Density's Portfolio software works to aggregate data from Density sensors across a collection of properties, to see how buildings and spaces are used at scale and from a single dashboard. This gives larger organizations a chance to access real-time and day-over-day return to office insight to track space usage and set safe capacity limits. And the software can track week-over-week trends and surface anomalies that may or may not need attention. The software also offers users a chance to benchmark building performance against organizational standards, so organizations can better understand right-size spaces based on space usage.


To help users manage occupancy density limits, Safe offers an anonymous people-counting system, which can manage the amount of employees or customers in a space with real-time capacity displays, with native mobile, web, SMS, and on-site digital signage available. The system is capable of alerting staff when occupancy reaches unsafe levels, and customers can also receive these alerts through subscription to Safe Alerts. And the Safe software offers analytics to allow users to monitor the space's compliance with social distancing policies. This system is also capable of turning screens into a density display to help customers and employees see occupancy limits and the percentage of those limits in real time.

Case Studies

Case Study

Envoy predicts employee needs with a responsive workplace

In order to reduce pain points in the workplace, including being locked out of an office, waiting in line, or getting kicked out of a meeting room, Envoy used Density because it offered an anonymous solution offering information they were looking for. This allowed Envoy to anonymously track people entering and exiting the building, and use the data to make short term and long term decisions, from space allocation and access control.

Friar Rick Riccioli uses Density to track service attendance

In general, places of worship rely on volunteers to count attendees at each entrance, with the volunteers acting as greeters, ushers, and counters. However, this means there is more chance for error during the counting and with the multitasking. And this is important as for one month per year, Catholic parishes are required to report attendance numbers from local churches. To increase the data accuracy and automate the counting, Friar Rick found Density and used them for the entrances to the Franciscan Church of the Assumption to automate the data counting.

Jefferson Bodega uses Density data to protect the community

Luke Horgan, owner of the Jefferson Bodega, wanted to display data on digital signage to help guide customers through the store. And with COVID-19, Horgan wanted something to ensure the foot traffic in the store to keep patrons safe and ensure there was enough space for people to keep a six foot distance from each other. Density offered Horgan an automated process and no need to hire a person to count foot traffic without increasing foot traffic, as well as allow him to check his foot traffic against his total sales and supply.

Marriott uses real-time data to anticipate guest needs

Marriott, which works to provide what the company calls brilliant service to their guests, needed a solution to track real-time occupancy in important locations, including fitness centers and the M-Club lounge. Density allowed Marriott to take a proactive approach to managing guest experiences and gt ahead or anticipate guest needs, including offering data on hotel foot traffic in the amenities spaces.

Notre Dame reimagines the campus experience with real-time data

In order to understand how the campus foot traffic has changed and how many students are in dining halls, and Notre Dame installed Density's system to anonymously count every person who entered and exited the space. This allowed Notre Dame to understand foot traffic in the campuses library and its most popular dining facility, and was able to optimize dining operations based on the data garnered from Density.


November 10, 2021
Density raises a $125,000,000 series D round from 01 Advisors, Altimeter Capital, Founders Fund, George Godula, Kleiner Perkins Caufield & Byers, LGF, Moving Capital, The R-Group, LLC and Upfront Ventures.
April 13, 2021
Density adds $25 Million from existing investors, hires former CBRE Global Head of Real Estate, and launches new feature, Portfolio, to support return to office
April 13, 2021
Density raises a $25,000,000 venture round from Bossa Nova Investimentos, Gaingels, George Godula and Riverside Ventures.
July 29, 2020
Density raises $51 million in a new round of funding led by Kleiner Perkins with participation from previous investors like Dick Costolo's 01 Advisors and the Los Angeles-based investment firm, Upfront Ventures.
July 29, 2020
Thanks to the COVID-19 epidemic, everybody wants Density's technology tracking building occupancy and use.
July 28, 2020
Density raises $51 million to promote social distancing with AI occupancy-tracking sensors.
July 2020
Density raises a $51,000,000 series C round from 01 Advisors, Alex Rodriguez, Cyan Banister, Disruptive Technology Advisers, Founders Fund, Greenoaks Capital, Julia Hartz, Kevin Hartz, Kleiner Perkins Caufield & Byers, LAUNCH, Ludlow Ventures, Scott Banister and Upfront Ventures.
June 2018
Density raises a $12,000,000 series B round from Daniel Scrivner and Founders Fund.
July 2016
Density raises a $4,000,000 series A round from Arjun Sethi, Dawn Patrol Ventures, Hiten Shah, Jason Calacanis and Upfront Ventures.
October 2014
Density raises a $200,000 seed round from Arjun Sethi, Daniel Curran, Jonathon Triest, LAUNCH and Ludlow Ventures.

Funding Rounds



Further Resources


Density raises $51 million to promote social distancing with AI occupancy-tracking sensors

Kyle Wiggers


July 28, 2020

Density Raises $51M from Kleiner Perkins to Reopen Buildings Safely


July 28, 2020

RE #133: Andrew Farah - - Building Tech to Analyze How the Built World is Actually Used


April 28, 2021

Thanks to COVID-19, everybody wants Density's technology tracking building occupancy and use

Jonathan Shieber


July 29, 2020


Hillary Chabot
July 22, 2021
Speculation about the impact of COVID-19 on America's thriving cities came almost as soon as the disease itself--and the diagnosis was usually grim. Plunging rents in New York and San Francisco indicated residents were fleeing their densely-packed urban lives for quarantine living in rural or suburban areas, perhaps never to return.


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