When was Interface Security Systems founded?

Interface Security Systems was founded in 1995 and raised its 1st funding round within a year of its incorporation.

Where is Interface Security Systems located?

Interface Security Systems is headquartered in Plano, United States.

How many employees does Interface Security Systems have?

As of Mar 31, 2026, the latest employee count at Interface Security Systems is 621.

Is Interface Security Systems a funded company?

Interface Security Systems is a funded company, having raised a total of $204M across 8 funding rounds to date. The company's 1st funding round was a $***** Unattributed round, raised on 1995.

When was the latest funding round of Interface Security Systems?

Interface Security Systems' latest funding was a $***** Series C round on Jan 12, 2021, with participation from 2 investors.

What is the annual revenue of Interface Security Systems?

Annual revenue of Interface Security Systems is $149M as on Dec 31, 2015.

Where does Interface Security Systems rank among its competitors?

Interface Security Systems ranks 2nd amongst 809 active competitors, of which 33 are funded. It stands 3rd in terms of total funding among its competitors. The most recent competitor to raise funding was SpecterOps, which secured $30M in Nov, 2025.

Who are the top competitors of Interface Security Systems?

Interface Security Systems' top competitors include eSentire, Blackpoint and Censys. Among them, SpecterOps secured the most recent funding round in November, 2025.

Interface Security Systems - 2026 Company Profile, Funding, Competitors & Financials

Interface Security Systems is a series C company based in Plano (United States), founded in 1995. It operates as a Managed network security over cloud based managed broadband connection. Interface Security Systems has raised $204M in funding from Prudential and SunTx Capital Partners. The company has 809 active competitors, including 33 funded and 79 that have exited. Its top competitors include companies like eSentire, Blackpoint and Censys.

Company Details

Interface Security Systems provides cloud based managed network services and security systems for retail, commercial and business. Its managed security services are delivered through a secure, cloud-based managed broadband connection which is a private network that connects and protects both the data and physical assets. Service include PCI-compliant secure, private managed broadband, managed digital voice, alarm & event monitoring, interactive video surveillance, managed access control and fire/life safety systems. Its SOC monitors, manages and supports the IT & physical infrastructure.

Website: interfacesystems.com
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Key Metrics

Founded Year

1995

Location

Plano, United States

Stage

Series C

Total Funding

$204M in 8 rounds

Latest Funding Round

Series C, Jan 12, 2021, $*****

Investors

Prudential & 6 more

Ranked

2^nd among 809 active competitors

Annual Revenue

$149M as on Dec 31, 2015

Employee Count

621 as on Mar 31, 2026

Investment & Acquisitions

Westec

Similar Companies

eSentire & 1024 more

View Interface Security Systems' full profile

Interface Security Systems is associated with 3 legal entities given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Documents
INTERFACE SYSTEMS LLC CIN: 001t000000WoQYkAAN , United States, Deadpooled		-	-	-
INTERFACE SECURITY SYSTEMS HOLDINGS INC CIN: 1164255 , United States, Active	Dec 02, 2001	$149M (As on Dec 31, 2015)	-	-
INTERFACE SECURITY SYSTEMS, LLC CIN: 4805403 , United States, Active		-	858 (As on Dec 31, 2016)	-

Interface Security Systems has raised a total funding of $204M over 8 rounds. Its first funding round was on 1995. Its latest funding round was a Series C round on Jan 12, 2021 for $*****. 2 investors participated in its latest round. Interface Security Systems has 7 institutional investors.

Here is the list of recent funding rounds of Interface Security Systems:

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Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Jan 12, 2021	1465383	Series C	3302981	5781367	7571367	9414150
Aug 2019	3190392	Series C	9861707	1452955	3608575	Everberg Capital
Aug 03, 2017	6772779	Series C	7171383	8316293	SunTx Capital Partners & 1 more	1826650

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View details of Interface Security Systems's funding rounds and investors

Interface Security Systems' employee count trend

Interface Security Systems has 621 employees as of Mar 26. Here is Interface Security Systems's employee count trend over the years:

Employee count trend for Interface Security Systems

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Top competitors of Interface Security Systems include eSentire, Blackpoint and Censys. Here is the list of Top 10 competitors of Interface Security Systems, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	eSentire 2001, Waterloo (Canada), Acquired	Provider of managed IT security services	$412M	Georgian, Edison Partners & 8 others	72/100
2nd	Interface Security Systems 1995, Plano (United States), Series C	Managed network security over cloud based managed broadband connection	$204M	Egis Capital Partners, Bregal Sagemount & 5 others	62/100
3rd	Blackpoint 2007, Ellicott City (United States), Series C	Threat detection & mitigation solution for enterprise network	$214M	Bain Capital, Telcom Ventures & 7 others	58/100
4th	Censys 2015, Ann Arbor (United States), Series C	Exposure management and threat hunting solutions	$103M	Google Ventures, Greylock & 10 others	57/100
5th	Soliton Systems 1979, Tokyo (Japan), Unfunded	Providers of managed security services	-	-	54/100
6th	SpecterOps 2017, Alexandria (United States), Series B	Provider of IT security services	$139M	Insight Partners, Decibel & 7 others	52/100
7th	Merlin International 1997, Tysons (United States), Unfunded	Cybersecurity solutions and services provider for government and commercial sectors	-	-	51/100
8th	INKA Entworks 2000, Seoul (South Korea), Early Stage	Provider of content and mobile application security services	$8.2M	SV INVESTMENT, Saints Capital & 8 others	50/100
9th	RADICL 2021, Boulder (United States), Series A	Global employee experience advisory company that inspires organizations to unlock their energy and purpose	$46.2M	Paladin Capital, Access Venture Partners & 4 others	50/100
10th	CYDERES 2017, Kansas City (United States), Funding Raised	Cybersecurity services for modern enterprises, managed security, professional services, and identity management	-	Apax	50/100