
Duo Security
Duo Security is a cybersecurity company specializing in IAM, founded in 2010 and headquartered in Ann Arbor, United States. It has raised $119M in equity across 6 priced rounds, plus $2.5M non-dilutive & grants, employs about 438 people, and was acquired by Cisco in 2018.
updated Oct 11, 2026
Latest Duo Security news and company activity
What Duo Security did, dated — selected moves from the record, one per kind, newest first.
- Aug 2026Customer winCase Study: Bluebeam Software + Duo
- May 2026Feature launchCisco Duo expands identity risk visibility with Cisco Foundation AI
- Feb 2026RecognitionCisco Systems Named Customers' Choice in Gartner® Peer Insights 2026
- Oct 2018AcquiredCisco Completes Acquisition of Duo Security
Duo Security funding
Duo Security has raised $119M in priced equity, plus $2.5M non-dilutive & grants. Its most recent round was a Venture Round in January 2020.
- Equity raised
- $119M6 priced rounds
- Last round
- Venture RoundJan 2020
- Other instruments
- $2.5M non-dilutive
Duo Security employees and hiring
Duo Security has about 438 employees, down 2% over the last 30 days.
- Employees
- 438
- 30-day change
- -2%
- Open roles
- 0
Duo Security competitors
Security professionals most often compare Duo Security against Okta, Beyond Identity, and SOFTwarfare on cybersectools.com. 19 more are in the platform, with overlap scoring.
ranked by CybersecTools comparison demand, 90 days
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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



















