Arcjet
Arcjet is a cybersecurity company specializing in Application Security, founded in 2023 and headquartered in San Francisco, United States. It has raised $12.1M in equity across 2 priced rounds, employs about 14 people, and is privately held.
updated Oct 11, 2026
Latest Arcjet news and company activity
What Arcjet did, dated — selected moves from the record, one per kind, newest first.
- Sep 2026Product launchArcjet launches agent runtime security for AI agents in production
- Jul 2026RecognitionArcjet Selected for Google Gemini Startup Forum: Cybersecurity
- Mar 2026Feature launchArcjet Enables Inline Defense Against Prompt Injection in Production AI Systems
- Oct 2025Funding roundArcjet raises $8.3M Series A to expand AI-powered in-code security platform
Arcjet Momentum score
44/ 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.
Arcjet funding
Arcjet has raised $12.1M in priced equity. Its most recent round was a Series A in October 2025.
- Equity raised
- $12.1M2 priced rounds
- Last round
- Series AOct 2025
Arcjet employees and hiring
Arcjet has about 14 employees, down 7% over the last 30 days.
- Employees
- 14
- 30-day change
- -7%
- Open roles
- 0
Arcjet competitors
Security professionals most often compare Arcjet against APIsec and C/side on cybersectools.com. The full competitive set, with overlap scoring, is in the platform.
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
