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 Sep 30, 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. Its primary sector is Finance & Accounting Tech. In United States, the Finance & Accounting Tech sector has seen $6.08B in funding in 2026 to date.

Where does onShore Security rank among its competitors?

onShore Security ranks 7th amongst 208 active competitors, of which 16 are funded. It stands 6th in terms of total funding among its competitors. The most recent competitor to raise funding was Incentify, which secured an undisclosed amount in Jun, 2026.

Who are the top competitors of onShore Security?

onShore Security's top competitors include Vialto Partners, Lettuce and Numeral One. Among them, Incentify secured the most recent funding round in June, 2026.

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

onShore Security is a series B company based in Chicago (United States), founded in 1991 by Stelios Valavanis. It operates as a Cyber security solutions provider. onShore Security has raised $46M in funding from Vertex Ventures and FPV Ventures. The company has 208 active competitors, including 16 funded and 19 that have exited. Its top competitors include companies like Vialto Partners, Lettuce and Numeral One.

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

7^th among 208 active competitors

Employee Count

27 as on Sep 30, 2026

Similar Companies

TaxDown & 691 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	6192056	Series B	6733208	7585270	3781827	7613358
Oct 24, 2024	8503025	Series A	5751304	9515437	1223631	Y Combinator & 2 more
Jan 01, 2023	1896601	Unattributed	1185873	1054266	7891541	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 Sep 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 Vialto Partners, Lettuce and Numeral One. 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	Vialto Partners 2022, New York City (United States), Acquired	Tax management, immigration, and mobility solutions for businesses	$225M	CD&R, HPS Investment Partners	65/100
2nd	Lettuce 2023, San Francisco (United States), Series A	Automated accounting and tax management software	$52M	Zeev Ventures, Viola FinTech	61/100
3rd	Numeral One 2022, San Francisco (United States), Series B	Software-based sales tax automation management platform	$57M	Benchmark, Y Combinator & 6 others	60/100
4th	Filed 2024, Brooklyn (United States), Seed	Provider of AI-powered tax preparation, review, and advisory software	$17.2M	Northzone, Day One Ventures & 4 others	59/100
5th	TaxAct 1998, Dallas (United States), Acquired	Software-based tax filing platform for individuals and businesses	$85M	TA Associates, Capital Southwest	58/100
6th	Zenwork 2002, Fayetteville (United States), Late Stage	Developer of software platforms for regulatory reporting and tax compliance	$163M	Spectrum Equity	57/100
7th	onShore Security 1991, Chicago (United States), Series B	Cyber security solutions provider	$46M	PruVen Capital, Vertex Ventures & 5 others	56/100
8th	Drake Software 1976, Knoxville (United States), Late Stage	Professional tax preparation software	-	Cinven	54/100
9th	CrossLink 2008, Lathrop (United States), Acquired	Tax software solutions for high-volume tax businesses	$33M	Comvest Partners, Hermes GPE	51/100
10th	Incentify 2019, El Segundo (United States), Series A	Cloud-based tax credits and incentives management platform for businesses	$13.8M	Innovent Capital Group, Ryan & 1 others	49/100