How much funding has Arcjet raised?

Arcjet has raised $12.1M in total. Its most recent round was a Series A in October 2025.

How many people work at Arcjet?

About 16, down 11% over the last 30 days.

Who are Arcjet's competitors?

Harness, Qwiet, and Prophaze Technologies Pvt.Ltd. are among the closest in Application Security. The full competitive set, with overlap scoring, is in the platform.

Arcjet

Application SecuritySan Francisco, United Statesfounded 2023private

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 total funding, employs about 16 people, and is privately held.

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updated Aug 22, 2026

The record

What Arcjet did, dated.

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

selected events only — the full dated record (9 events since Oct 2025) lives in the platform

Momentum

30 out of 100.

Momentum blends hiring, funding, traffic and sentiment into one score, recomputed daily. The score is free; the pillars behind it unlock in the platform.

Growthlocked

Marketlocked

Financiallocked

Products

What Arcjet sells.

ArcjetDeveloper-first security SDK for bot detection, rate limiting, and attack protectionDetails ↗

In the platform

The other 440 data points.

Funding historyevery round, every lead investor
Headcount growthvelocity, departments, seniority
Open jobslive postings, hiring pace, role mix
Tech stackframeworks, clouds, security

Similar in Application Security

FAQ

Common questions about Arcjet.

How much funding has Arcjet raised?: Arcjet has raised $12.1M in total. Its most recent round was a Series A in October 2025.
How many people work at Arcjet?: About 16, down 11% over the last 30 days.
Who are Arcjet's competitors?: Harness, Qwiet, and Prophaze Technologies Pvt.Ltd. are among the closest in Application Security. The full competitive set, with overlap scoring, is in the platform.