When was onShore Security founded?

onShore Security was founded in 1991 and raised its 1st funding round 32 years after it was founded.

Where is onShore Security located?

onShore Security is headquartered in Chicago, United States.

Who is the current CEO of onShore Security?

Stelios Valavanis of onShore Security. They have also founded 1 company.

How many employees does onShore Security have?

As of Jul 31, 2026, the latest employee count at onShore Security is 27.

Is onShore Security a funded company?

onShore Security is a funded company, having raised a total of $46M across 3 funding rounds to date. The company's 1st funding round was a $***** Unattributed round, raised on Jan 01, 2023.

When was the latest funding round of onShore Security?

onShore Security's latest funding was a $***** Series B round on Feb 19, 2026, with participation from 6 investors.

Where does onShore Security rank among its competitors?

onShore Security ranks 5th amongst 557 active competitors, of which 47 are funded. It stands 5th in terms of total funding among its competitors. The most recent competitor to raise funding was TaxDown, which secured $4.65M in Mar, 2026.

Who are the top competitors of onShore Security?

onShore Security's top competitors include TaxDown, Numeral One and Lettuce. Among them, TaxDown secured the most recent funding round in March, 2026.

onShore Security - 2026 Company Profile, Team, Funding & Competitors

Company Details

OnShore Security provides cybersecurity services. Provides real-time monitoring, correlation, and analysis of an organization's network. The company uses IDS (intrusion detection system) technologies and collect data from cloud-placed sensors, firewalls, network devices etc and correlate data into company's proprietary SIEM (security information and event management) to provide end-to-end security.

Website: onshore.com
Social
Email ID: *****@onshore.com
Phone Number: +1 **********

Key Metrics

Founded Year

1991

Location

Chicago, United States

Stage

Series B

Total Funding

$46M in 3 rounds

Latest Funding Round

Series B, Feb 19, 2026, $*****

Investors

Vertex Ventures & 6 more

Ranked

5^th among 557 active competitors

Employee Count

27 as on Jul 31, 2026

Similar Companies

TaxDown & 674 more

View onShore Security's full profile

onShore Security has raised a total funding of $46M over 3 rounds. Its first funding round was on Jan 01, 2023. Its latest funding round was a Series B round on Feb 19, 2026 for $*****. 6 investors participated in its latest round. onShore Security has 7 institutional investors.

Here is the list of recent funding rounds of onShore Security:

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Feb 19, 2026	9638020	Series B	6963633	4981131	7246098	5451531
Oct 24, 2024	3405170	Series A	3423420	4085004	6779248	Y Combinator & 2 more
Jan 01, 2023	5407182	Unattributed	1461408	2032989	3442039	Y Combinator

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View details of onShore Security's funding rounds and investors

The founders of onShore Security is Stelios Valavanis. Dominic Vitucci and Stelios Valavanis are the CEOs of onShore Security.

Here are the details of onShore Security's key team members:

Stelios Valavanis: Founder & CEO of onShore Security.
Contact Info: 1 email address

View details of onShore Security's Founder profiles and Board Members

onShore Security's employee count trend

onShore Security has 27 employees as of Jul 26. Here is onShore Security's employee count trend over the years:

Employee count trend for onShore Security

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Top competitors of onShore Security include TaxDown, Numeral One and Lettuce. Here is the list of Top 10 competitors of onShore Security, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	TaxDown 2018, Madrid (Spain), Series B	Cloud and app-based tax management solutions for individuals and businesses	$26.1M	Base10 Partners, Abac Nest & 19 others	69/100
2nd	Numeral One 2022, San Francisco (United States), Series B	Software-based sales tax automation management platform	$57M	Benchmark, Y Combinator & 6 others	62/100
3rd	Lettuce 2023, San Francisco (United States), Series A	Automated accounting and tax management software	$52M	Zeev Ventures, Viola FinTech	61/100
4th	Vialto Partners 2022, New York City (United States), Acquired	Tax management, immigration, and mobility solutions for businesses	$225M	CD&R, HPS Investment Partners	60/100
5th	onShore Security 1991, Chicago (United States), Series B	Cyber security solutions provider	$46M	PruVen Capital, Vertex Ventures & 5 others	60/100
6th	TaxAct 1998, Dallas (United States), Acquired	Software-based tax filing platform for individuals and businesses	$85M	TA Associates, Capital Southwest	58/100
7th	TaxBuddy 2018, Mumbai (India), Seed	Provider of assisted and DIY online tax filing services	$3.68M	Zenith Global, Systematix & 40 others	57/100
8th	Filed 2024, Brooklyn (United States), Seed	Provider of AI-powered tax preparation, review, and advisory software	$17.2M	Northzone, Day One Ventures & 4 others	56/100
9th	Tax Systems 1991, Staines upon Thames (United Kingdom), Acquired	Tax compliance and regulatory solutions for businesses	-	Rothschild & Co, Voyager Capital Partners ... & 1 others	56/100
10th	Drake Software 1976, Knoxville (United States), Late Stage	Professional tax preparation software	-	Cinven	55/100