Bolster
PrivateLast Round
Series B
May 22, 2024
Total Funding Raised
$39M
Company Overview
Bolster operates in Cybersecurity and is based in Santa Clara, California. Its latest recorded funding round was a Series B round in May 2024.
Bolster is a cybersecurity company that provides an artificial intelligence-driven platform for real-time detection and automated takedown of phishing, fraud, and digital impersonation threats.
Sector
Cybersecurity
Verticals
Threat Intelligence, Application Security, Compliance & Risk, Email Security
Business Model
B2B
Customer Profile
Subscription SaaS
AI Layer
Application
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Bolster Comparables
Compare Bolster with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Redflag AI | 87% | |
| Tracer | 85% | |
| BforeAI | 83% |
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Bolster Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series B | May 22, 2024 | ||||
| Series A Extension | Oct 18, 2022 | ||||
| Series A | Nov 5, 2019 |
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Key People
Founding team and executive leadership
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Bolster Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Rain Capital | Series A |
| Liberty Global Ventures | Series B, Series A Extension |
| Crosslink Capital | Series B, Series A Extension, Series A |
| M12 - Microsoft's Venture Fund | Series B |
| Cervin Ventures | Series B, Series A Extension |
| Transform Capital | Series B |
| Cheyenne Ventures | Series B, Series A Extension |
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Market signals
Structured signals derived from secondary market and firmographic data.
- Mar 30, 2026
CEO attended RSAC 2026 to discuss fraud landscape.
- Aug 19, 2025
Integrated intelligence platform with ThreatQuotient to detect threats earlier.
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Recent news
Latest coverage and updates
- launchesOct 27, 2026
Bolster, Inc. launches Threat Graph within Bolster AI Signals to help security teams uncover connected infrastructure behind phishing, impersonation and online fraud campaigns on Oct '26.
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Bolster Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
Filing documents are not displayed on this public page. Request access to learn about available coverage.
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Frequently Asked Questions
Common questions about Bolster's valuation, stock price, and market status.
Is Bolster a public or private company?
Bolster is a private company.
What is the current stock price of Bolster?
Bolster is a private company, so its shares have no public market price. Caplight tracks Bolster's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Bolster worth (valuation)?
Valuation information for Bolster is not publicly available.
Can I buy Bolster stock?
Bolster shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Bolster's last funding round?
Bolster's most recent funding round was Series B on May 22, 2024.
Who are the main investors in Bolster?
Key investors in Bolster include Liberty Global Ventures, Crosslink Capital, M12 - Microsoft's Venture Fund, Cervin Ventures, Cheyenne Ventures.
Will Bolster IPO soon?
No public IPO plans have been announced for Bolster.
How can I track Bolster secondary market activity?
Caplight tracks bids, offers, and trades in Bolster's shares on secondary markets.