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 16 people, and is privately held.
updated Sep 12, 2026
Latest Arcjet news and company activity
What Arcjet did, dated — selected moves from the record, one per kind, newest first.
- Mar 2026Feature launchArcjet enables inline defense against prompt injection
- Jan 2026Feature launchArcjet Python SDK Sinks Teeth Into Application-Layer Security
- Oct 2025Funding roundArcjet raises $8.3M Series A to expand AI-powered in-code security platform
10 events tracked since Oct 2025 · selected events shownUnlock the complete Arcjet timeline
Arcjet Momentum score
30/ 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 16 employees, down 11% over the last 30 days.
- Employees
- 16
- 30-day change
- -11%
- Open roles
- 0
Arcjet competitors
Security professionals most often compare Arcjet against Akamai, APIsec, and C/side on cybersectools.com. The full competitive set, with overlap scoring, is in the platform.
by search demand for comparison pages on cybersectools.com, 90 days
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
