Semmle is a company that develops an engineering analytics platform to manage the software development process. Its products include QL and LGTM. QL is a code analysis engine for product security teams to find zero-days and variants of critical vulnerabilities. LGTM is a code analysis platform for development teams to identify vulnerabilities early and prevent them from reaching production.

Employee Rating

Parent CompanyGitHub
HQSan Francisco, CA, US
Cybersecurity ratingBMore
Semmle was founded in 2006 and is headquartered in San Francisco, CA, US

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Key People/Management at Semmle

Oege de Moor

Oege de Moor

Founder and CEO
Julian Tibble

Julian Tibble

VP of Applications Engineering
Pavel Avgustinov

Pavel Avgustinov

Co-founder, VP, QL Engineering
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Semmle Office Locations

Semmle has offices in San Francisco, Bellevue, New York, København and in 2 other locations
San Francisco, CA, US (HQ)
44 Montgomery, 44 Montgomery St floor 3, San Francisco
Bellevue, WA, US
10400 NE 4th St
New York, NY, US
110 5th Ave
København, DK
Vendersgade 28
València, ES
Carrer del Governador Vell, 29
Oxford, GB
Blue Boar Court, 9 Alfred St
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Semmle Financials and Metrics

Summary Metrics

Founding Date


Total Funding

$31 m


In total, Semmle had raised $31 m. Semmle is a subsidiary of GitHub

Semmle Cybersecurity Score

Cybersecurity ratingPremium dataset



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Semmle Online and Social Media Presence

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Semmle News and Updates

GitHub acquires Semmle to help developers spot security vulnerabilities

Popular software hosting service GitHub has acquired Semmle, a code analysis platform that helps product developers and security researchers discover potential zero-days and critical vulnerabilities in large codebases. The financial terms of the deal were not disclosed by the two companies. But GitH…

Semmle lands $21 million in its bid to automate software

Software quality firm Semmle Ltd. has been toiling in relative anonymity for the past four years, but that hasn’t stopped it from racking up customers such as Capital One, Credit Suisse Group AG, Google Inc., Microsoft Corp. and Nasdaq Inc. Today, it’s launching formally and announcing a fresh $21 …

Semmle, startup that makes code searchable, hauls in $21M Series B

Semmle, a startup that originally spun out of research at Oxford, announced a $21 million Series B investment today led by Accel Partners. It marked the second time Accel has led an investment in the company. Other investors include Work-Bench, Capital One, Credit Suisse, Google, Microsoft, NASA and…

Semmle Blogs

Another libssh2 integer overflow (CVE-2019-17498)

Severity and mitigation Like I said in my previous blog post about a vulnerability in libssh2: don't panic! This is not a vulnerability in…

QL Training Slides

Semmle provides extensive documentation to help you learn QL, and we have recently added a new section called QL training and variant…

Golang Support on LGTM - Now in Beta

Welcome Gophers! Today, we launched support for the Go language on, and you can now write and run QL queries to analyze your Go…

Announcing the CTF Winners

Thanks to everyone who participated and helped make this contest a success! These intrepid developers decided to test their vulnerability…
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Semmle Frequently Asked Questions

  • When was Semmle founded?

    Semmle was founded in 2006.

  • Who are Semmle key executives?

    Semmle's key executives are Oege de Moor, Julian Tibble and Pavel Avgustinov.

  • How many employees does Semmle have?

    Semmle has 8 employees.

  • Who are Semmle competitors?

    Competitors of Semmle include Checkmarx, Lightrun and Valohai.

  • Where is Semmle headquarters?

    Semmle headquarters is located at 44 Montgomery, 44 Montgomery St floor 3, San Francisco, San Francisco.

  • Where are Semmle offices?

    Semmle has offices in San Francisco, Bellevue, New York, København and in 2 other locations.

  • How many offices does Semmle have?

    Semmle has 6 offices.