Signal AI
PrivateLast Round
Growth Equity
Sep 24, 2025
Est. Valuation
$200M
Total Funding Raised
$266.44M
Momentum
Top 10%
of companies Caplight tracks
Company Overview
Signal AI operates in Enterprise Software and is based in London. Its latest recorded funding round was a Growth Equity round in September 2025.
Signal AI is a software company that provides an AI-powered external intelligence platform for media monitoring, reputation management, and enterprise risk intelligence.
Sector
Enterprise Software
Verticals
Business Intelligence, Compliance & Risk, Marketing, NLP & Conversational AI, News & Media
Business Model
B2B
Customer Profile
Subscription SaaS, Data as a Service
AI Layer
Application
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Signal AI Comparables
Compare Signal AI with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Meltwater | 82% | |
| Polecat | 81% | |
| Onclusive | 80% |
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Signal AI Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Growth Equity | Sep 24, 2025 | ||||
| Series D | Dec 15, 2021 | ||||
| Series C | Oct 22, 2019 | ||||
| Series B | Jun 27, 2018 | ||||
| Series A | Dec 13, 2016 | ||||
Seed | Oct 9, 2015 |
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Key People
Founding team and executive leadership
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Signal AI Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Kreos Capital | Series B |
| Aberdeen Group plc | Series D |
| LocalGlobe | Series A, Series B |
| M25 | Seed |
| Hearst Ventures | Series D, Series A, Series B, Series C |
| Kreos Capital | Series B |
| Mercuri | Growth Equity, Series C, Series B |
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Market signals
Structured signals derived from secondary market and firmographic data.
- Sep 24, 2026
Grew 17% QoQ, from 240 to 280 employees.
- Aug 2, 2026
Grew 20% QoQ, from 234 to 281 employees.
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Recent news
Latest coverage and updates
- recognized_asNov 3, 2026
Gartner recognizes Signal AI as a Leader in the 2026 Gartner(R) Magic Quadrant(TM) for PR and Media Monitoring Tools on Oct 30th '26, following its selection in Gartner’s ranking for the PR and media monitoring tools market in the United Kingdom and New York.
- receives_awardOct 13, 2026
Signal AI receives the Cross-Functional Risk Intelligence Award from Chartis in the RiskTech100 2027 and ranks among the Top 75 risk technology providers globally on Oct 13th '26.
- launchesSep 8, 2026
On Sep 8th '26, Signal AI announces the launch of Smart Search, an AI-powered query builder designed to make intelligence gathering faster, easier and more accessible while retaining the Signal platform’s powerful search capabilities.
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Signal AI 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 Signal AI's valuation, stock price, and market status.
Is Signal AI a public or private company?
Signal AI is a private company.
What is the current stock price of Signal AI?
Signal AI is a private company, so its shares have no public market price. Caplight tracks Signal AI's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Signal AI worth (valuation)?
Signal AI's valuation is estimated at $200.0M based on funding round data.
Can I buy Signal AI stock?
Signal AI shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Signal AI's last funding round?
Signal AI's most recent funding round was Growth Equity on September 24, 2025.
Who are the main investors in Signal AI?
Key investors in Signal AI include Mercuri, Battery Ventures, Redline Capital Management, MMC Ventures, Frontline Ventures.
Will Signal AI IPO soon?
No public IPO plans have been announced for Signal AI.
How can I track Signal AI secondary market activity?
Caplight tracks bids, offers, and trades in Signal AI's shares on secondary markets.