SecuLetter is a publicly traded company.

Where is SecuLetter headquartered?

SecuLetter is headquartered in Seongnam, South Korea.

Who are SecuLetter's competitors?

PRESENSE Technologies GmbH, Klearis, and Resec are among the closest in Email & Messaging Security. The full competitive set, with overlap scoring, is in the platform.

What products does SecuLetter sell?

SecuLetter sells SecuLetter Content Security Platform.

SecuLetter

Email & Messaging SecuritySeongnam, South Koreafounded 2015publicseculetter.com ↗

SecuLetter is a cybersecurity company specializing in Email & Messaging Security, founded in 2015 and headquartered in Seongnam, South Korea. It has raised $16.66M in equity across 4 priced rounds, employs about 17 people, and is publicly traded.

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updated Oct 11, 2026

Latest SecuLetter news and company activity

What SecuLetter did, dated — selected moves from the record, one per kind, newest first.

Jan 2026PartnershipDual-layer defense eliminates hidden threats: Sejong Telecom's Aircode integrates SecuLetter CDR solution
Apr 2021PartnershipSecuLetter Signs New Partnership with Top Saudi IT Firm
Jun 2020Customer winJoongbu University to strengthen its email security with SecuLetter
Mar 2020Funding roundSecuLetter closes US$8M Series B funding round

SecuLetter Momentum score

42/ 100

Mandos Momentum blends hiring, funding, traffic and sentiment into one score out of 100. The score is free; the pillars behind it unlock in the platform.

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SecuLetter products

SecuLetter Content Security PlatformDetects and removes malicious content from files and URLs via disarm and reconstruction.Details ↗

SecuLetter funding

SecuLetter has raised $16.66M in priced equity. Its most recent round was a Series B in March 2020. It has 4 funding rounds on record: Series A, Venture Round, Series B, and Series B. 6 investors are on record, including Korea Development Bank and Korea Investment Partners.

Equity raised: $16.66M4 priced rounds
Last round: Series BMar 2020

View the complete funding history

SecuLetter employees and hiring

As of September 2026, SecuLetter has about 17 employees.

Employees: 17
30-day change: 0%
Open roles: 0

See hiring trends

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The other 440 data points.

Funding historyevery round, every investor named
Headcount growthvelocity, departments, seniority
Open jobslive postings, hiring pace, role mix
Tech stackframeworks, clouds, security
Competitorsfull set, overlap scored
Leadershipevery exec, with roles
Customersnamed publicly, with sources
Reviews & newssentiment, coverage, cadence

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Funding, round by round, with the investors
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The other 440 data points.

Funding historyevery round, every investor named
Headcount growthvelocity, departments, seniority
Open jobslive postings, hiring pace, role mix
Tech stackframeworks, clouds, security

Similar in Email & Messaging Security

Common questions about SecuLetter.

How much funding has SecuLetter raised?: SecuLetter has raised $16.66M in priced equity. Its most recent round was a Series B in March 2020. It has 4 funding rounds on record: Series A, Venture Round, Series B, and Series B. 6 investors are on record, including Korea Development Bank and Korea Investment Partners.
How many people work at SecuLetter?: As of September 2026, SecuLetter has about 17 employees.
Who owns SecuLetter?: SecuLetter is a publicly traded company.
Where is SecuLetter headquartered?: SecuLetter is headquartered in Seongnam, South Korea.
Who are SecuLetter's competitors?: PRESENSE Technologies GmbH, Klearis, and Resec are among the closest in Email & Messaging Security. The full competitive set, with overlap scoring, is in the platform.
What does SecuLetter do?: SecuLetter is a cybersecurity company specializing in Email & Messaging Security, founded in 2015 and headquartered in Seongnam, South Korea.
What products does SecuLetter sell?: SecuLetter sells SecuLetter Content Security Platform.