How much funding has Bolster raised?

Bolster has raised $46M in total. Its most recent round was a Series B in May 2024.

How many people work at Bolster?

About 91, down 1% over the last 30 days, with 3 open roles.

Who are Bolster's competitors?

Hadrian, ZeroFox, and Praetorian are among the closest in Attack Surface. The full competitive set, with overlap scoring, is in the platform.

Bolster

Attack SurfaceSanta Clara, United Statesfounded 2019private

Bolster is a cybersecurity company specializing in Attack Surface, founded in 2019 and headquartered in Santa Clara, United States. It has raised $46M in total funding, employs about 91 people, and is privately held.

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updated Aug 22, 2026

The record

What Bolster did, dated.

Mar 2026PartnershipBolster AI Powers New Brand Guardian Solution to Combat AI-Driven Fraud
Oct 2025Product launchBolster AI Launches "Signals" to Give CISOs Real-Time Intelligence on Brand and Cyber Risk

selected events only — the full dated record (4 events since Oct 2025) lives in the platform

Momentum

37 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

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Products

What Bolster sells.

Bolster PlatformAI platform for phishing detection, brand impersonation monitoring & takedowns.Details ↗

In the platform

The other 440 data points.

Funding historyevery round, every lead investor
Headcount growthvelocity, departments, seniority
Open jobs3 live postings, role mix
Tech stackframeworks, clouds, security

Similar in Attack Surface

FAQ

Common questions about Bolster.

How much funding has Bolster raised?: Bolster has raised $46M in total. Its most recent round was a Series B in May 2024.
How many people work at Bolster?: About 91, down 1% over the last 30 days, with 3 open roles.
Who are Bolster's competitors?: Hadrian, ZeroFox, and Praetorian are among the closest in Attack Surface. The full competitive set, with overlap scoring, is in the platform.