Sublime Security

Sublime is the new standard for email security.

Cybersecurity Developer tools and cloud

Latest funding

$150M Series B+ · October 28, 2025

Source: fundraisingfox.com

Total raised: $239.8M across 4 sourced rounds

All 4 rounds ↓

Website: sublime.security.

X: @sublime_sec · 2,499 followers.

LinkedIn: linkedin.com.

Categories: Cybersecurity Developer tools and cloud.

Sectors: Artificial Intelligence (AI), Cloud Security, Cyber Security, Network Security.

Stage: Series B+.

Based in: Washington, DC, United States.

Founded: 2019.

Total raised: $239.8M in 4 sourced rounds.

Last round: Oct 28, 2025 · 383 days ago.

Headcount: 251–500 employees.

On Recent Funding since: Sep 30, 2026.

Signals

X account@sublime_sec · created Jun 17, 2018 (8 years old) · 2,499 followers

Website registeredSep 2, 2022 (4 years old)

About Sublime Security

Not just another black box, our AI-powered detection engine detects and prevents email attacks, so security teams can spend less time on email-originated incidents.

TIMELINE · MONEY RAISED

Sublime Security | 1710 days from X account to first raise on record

@sublime_sec·Raised $240M in 4 sourced rounds·2 signals before the first raise

Money raised, round by round (amounts linked to their source). Pins are dated signals; hover the icons for dates.

Funding rounds

Date	Round	Amount	Lead	Source
Oct 28, 2025	Series B+	$150M	—	fundraisingfox.com
Dec 12, 2024	Series B+	$60M	IIVP	fundraisingfox.com
Apr 25, 2024	Series A	$20M	IIndex Ventures	fundraisingfox.com
Feb 21, 2023	Seed	$9.8M	DDecibel Partners	businesswire.com

Timeline

September 2, 2022
Website created
June 17, 2018
X account created

Founders and team

IT
Ian Thiel Founder

@ianthiel
JK
Joshua Kamdjou Founder

@jkamdjou · LinkedIn
BF
Bobby Filar Head of Data Science
OJ
Omar Jalalzada Head of Design
RW
Ross Wolf Engineer

Investors

Companies like Sublime Security

SSecuronix$1B Series B+ · Feb 2022
NNebulock$25M Series A · Jun 2026
SStraiker$64M Series A · Jun 2026
SSAFVR
OOperant AISeries A · May 2026
MMail0$2M Seed · Jul 2025

Other companies backed by IVP

LLangChain$300M Series B+ · Nov 2026
WWabi$55M Series A · Oct 2026
PPigment$250M Series B+ · Oct 2026
SScuba$34M Pre Seed · Oct 2026
WWonderful$550M Series B+ · Sep 2026
OObsidian Security$85M Series B+ · Aug 2026

IVP portfolio →

Sources and API

Every amount links to the page it came from. * Estimated from an accelerator's published standard deal, not a company-specific disclosure. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/sublime-security (get a free API key).