Sublime Security
Cybersecurity · Email Security
$210Mtotal raised · 2 rounds on record
$150Mlatest round · Series C · Oct 2025 · 12 mo ago
4backers · 01 Advisors, Decibel
205team · US Form 5500 (plan participants) · Dec 2025 · +260% in a year
Overview
Sublime Security provides an email security platform with an open detection language. Security teams write and share custom rules rather than relying on an opaque vendor engine. The approach appeals to organisations that want transparency in filtering.
Funding and backers
Total raised
$210M
2 rounds on record
Latest round
$150M
Series C · Oct 2025 · 12 mo ago
Team
205
US Form 5500 (plan participants) · Dec 2025 · +260% in a year
Backers
4
01 Advisors, Decibel
The money's age
Due for its next round
12 months since the last round · not hiring
Momentum
0/100
no fresh signals
Last sign of life
2 mo ago
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
2025
Team of 205 was 57 · US Form 5500 (plan participants)
Oct 28, 2025
Raised a round Series C $150M
Dec 12, 2024
Raised a round Series B $60M · YahooFinance
2021
Founded
Tractionpublic signals, read monthly
Web presence
top 0.03%
of 133.2M domains by links, Common Crawl
Hacker News stories
6
best: 5 points
Funding rounds
| Round | Date | Amount | Investors | Source |
|---|---|---|---|---|
| Series C | Oct 2025 | $150M | — | marketwatch.com |
| Series B | Dec 2024 | $60M | — | YahooFinance |
Backed byfrom the funds' portfolios and accelerator catalogs
01 Advisors 
Decibel 
Index Ventures 
IVP Connections
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Shared investors
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Owner
Same company
Same group
Likely
News
Sublime Security Debuts First Partner Program To Boost Agentic Email Security In The Channel
Sublime Security on Tuesday announced its first formal channel program as the startup seeks to accelerate the growth of its agentic email security platform with the help of solution and service provider partners, according to Channel Chief Timm Hoyt.
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Sublime Security Named to Fortune Cyber 60 List of Fastest Growing Startups
Sublime Security, the agentic email security platform, today announced it has been named to the 2026 Fortune Cyber 60 list of the most significant venture-backed cybersecurity startups. This year
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Sublime Security Raises $150M in Series C Funding as Industry-First AI Agents Accelerate Growth
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Email security provider Sublime Security raises $60M for platform growth
Email security provider Sublime Security raises $60M for platform growth - SiliconANGLE
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Offices
Where the company hires and what each office is for
Cities
1
Hiring now
0
Countries
1
Washington
United States
HQ