When was Nucleus founded?

Nucleus was founded in 2018 and raised its 1st funding round 3 years after it was founded.

Where is Nucleus located?

Nucleus is headquartered in Sarasota, United States. It is registered at 71 Alafia Drive, Sarasota FL 34240 ..

Who is the current CEO of Nucleus?

Stephen Carter of Nucleus. They are also an angel investors in 1 startup.

How many employees does Nucleus have?

As of Aug 31, 2026, the latest employee count at Nucleus is 129.

Is Nucleus a funded company?

Nucleus is a funded company, having raised a total of $86.1M across 5 funding rounds to date. The company's 1st funding round was a $***** Series A round, raised on Mar 03, 2021.

When was the latest funding round of Nucleus?

Nucleus' latest funding was a $***** Series C round on Feb 11, 2026, with participation from 1 investor. Its primary sector is GRC Software. In United States, the GRC Software sector has seen $1.66B in funding in 2026 to date.

Where does Nucleus rank among its competitors?

Nucleus ranks 18th amongst 1093 active competitors, of which 158 are funded. It stands 3rd in terms of total funding among its competitors. The most recent competitor to raise funding was Opaque, which secured $24M in Feb, 2026.

Who are the top competitors of Nucleus?

Nucleus' top competitors include Proofpoint, SecurityScorecard and BitSight. Among them, Opaque secured the most recent funding round in February, 2026.

Nucleus - 2026 Company Profile, Team, Funding & Competitors

Nucleus is a series C company based in Sarasota (United States), founded in 2018 by Stephen Carter and Scott Kuffer. It operates as an Integrated risk and vulnerability management platform. Nucleus has raised $86.1M in funding from investors like Arthur Ventures, Lead Edge Capital and Delta-v Capital. The company has 1093 active competitors, including 158 funded and 102 that have exited. Its top competitors include companies like Proofpoint, SecurityScorecard and BitSight.

Company Details

Integrated risk and vulnerability management platform. It collects data from disparate vulnerability scanners and provides a comprehensive insight into the current risk posture through trends & reports. Supports integrations to Checkmarx, Netsparker, Veracode, and more. The solution can also be used for asset discovery & management. Notable partners include Amazon, Snyk, and Qualys.

Website: nucleussec.com
Social
Email ID: *****@nucleussec.com
Phone Number: +1 **********
Registered Address: 71 Alafia Drive, Sarasota FL 34240 .

Key Metrics

Founded Year

2018

Location

Sarasota, United States

Stage

Series C

Total Funding

$86.1M in 5 rounds

Latest Funding Round

Series C, Feb 11, 2026, $*****

Investors

Arthur Ventures & 5 more

Ranked

18^th among 1093 active competitors

Employee Count

129 as on Aug 31, 2026

Similar Companies

Proofpoint & 1125 more

View Nucleus' full profile

Nucleus is associated with 1 legal entity given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Documents
NUCLEUS SECURITY, INC. CIN: 84-2251606 , United States, Active	May 13, 2019	-	22 (As on Dec 31, 2021)	-

Nucleus has raised a total funding of $86.1M over 5 rounds. Its first funding round was on Mar 03, 2021. Its latest funding round was a Series C round on Feb 11, 2026 for $*****. 1 investor participated in its latest round. Nucleus has 6 institutional investors.

Here is the list of recent funding rounds of Nucleus:

Filter this list

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Feb 11, 2026	2130280	Series C	6933871	5122779	5170363	2601989
Aug 20, 2024	7068334	Series B	7870762	9813155	6748365	8565230
Feb 12, 2024	5178389	Series B	4865109	6638762	Arthur Ventures & 1 more	In-Q-Tel

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View details of Nucleus's funding rounds and investors

The founders of Nucleus are Stephen Carter and Scott Kuffer. Stephen Carter is the CEO of Nucleus.

Here are the details of Nucleus' key team members:

Stephen Carter: Co-Founder & CEO of Nucleus. They are also an angel investor in 1 startup and serve on the board of 1 company.
Contact Info: 1 email address
Scott Kuffer: Co-Founder & CPO & COO of Nucleus. They serve on the board of 1 company.
Contact Info: 1 email address

Nucleus' Board of Directors

Nucleus's board has 6 active members. Stephen Carter, Scott Kuffer, Avery Rosin, Ryan Kruizenga, Michael Nixon and NICHOLAS FLEMING are independent board members.

Here is the list of Nucleus' board of directors:

Name	Type	Representing	Status	Duration
Stephen Carter	Independent board member	-	Current	5y 6m
rdxetnr	Independent board member	-	Current	5y 1m
cdwktmf	Independent board member	-	Current	8y 6m
uxhhnwg	Independent board member	-	Current	6y 4m
xod{vlb	Independent board member	-	Current	5y 3m
mx{lepy	Independent board member	-	Current	8y 4m

View details of Nucleus's Founder profiles and Board Members

Nucleus' employee count trend

Nucleus has 129 employees as of Aug 26. Here is Nucleus's employee count trend over the years:

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Top competitors of Nucleus include Proofpoint, SecurityScorecard and BitSight. Here is the list of Top 10 competitors of Nucleus, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Proofpoint 2002, Sunnyvale (United States), Acquired	Provider of cybersecurity solutions, services, and training for enterprise protection	$86M	Benchmark, Bridgescale & 22 others	77/100
2nd	SecurityScorecard 2013, New York City (United States), Series E	Provider of supply chain detection and response and risk management	$292M	T. Rowe Price, Riverwood Capital & 25 others	73/100
3rd	BitSight 2011, Boston (United States), Series E	Provider of cyber risk intelligence and exposure management solutions powered by AI	$398M	Flybridge Capital Partners, Menlo Ventures ... & 16 others	71/100
4th	GardaWorld 1995, Montreal (Canada), Acquired	Provider of security personnel, risk management, and security service solutions	-	ATB Financial, Rhone Group & 10 others	70/100
5th	CloudSEK Research 2015, Singapore (Singapore), Series B	Provider of predictive attack path intelligence and digital risk monitoring	$42.7M	Exfinity Venture Partners, Parampara Capital ... & 19 others	68/100
6th	CloudCheckr 2011, Rochester (United States), Acquired	Cloud-based solutions for vulnerability assessment & cloud maanagement	$67.4M	Level Equity, Garrison Capital & 4 others	67/100
7th	Vicarius 2016, Tel Aviv (Israel), Series B	Proxy based isolation for malware attack prevention on the endpoints	$59.1M	JVP, AllegisCyber Capital & 9 others	66/100
8th	Axio Global 2016, New York City (United States), Acquired	Provider of cyber risk management, mitigation, and insurance solutions	$30M	NFP Venture, IA Capital Group & 5 others	65/100
9th	Coalfire 2001, Westminster (United States), Acquired	Cybersecurity and compliance services provider, securing organizations in regulated industries	$12.9M	Baird Capital, Chertoff Group & 1 others	65/100
10th	Opaque 2019, Berkeley (United States), Series B	Cloud and AI based analytics for encrypted cloud data	$55.5M	Walden Catalyst, Intel Capital & 10 others	64/100
18th	Nucleus 2018, Sarasota (United States), Series C	Integrated risk and vulnerability management platform	$86.1M	Delta-v Capital, Lead Edge Capital & 4 others	61/100