SignalWire
PrivateLast Round
Series B
Extension
Mar 23, 2022
Total Funding Raised
$41.5M
Company Overview
SignalWire operates in AI, Data & Cloud Infrastructure and is based in Palo Alto, California. Its latest recorded funding round was a Series B Extension round in March 2022.
SignalWire is a software development applications company that provides a cloud-based programmable unified communications platform for voice, video, messaging, and AI applications.
Sector
AI, Data & Cloud Infrastructure
Verticals
Cloud Communications, NLP & Conversational AI, Enterprise Communication, Platform-as-a-Service, VoIP
Business Model
B2B
Customer Profile
Usage-Based SaaS, Services & Consulting
AI Layer
Infrastructure
Historical Pricing
Historical view of private secondary pricing and transaction trends.
SignalWire Comparables
Compare SignalWire with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| LiveKit | 84% | |
| Voximplant | 84% | |
| Telnyx | 83% |
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SignalWire Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series B Extension | Mar 23, 2022 | ||||
| Series B | Jun 2, 2021 | ||||
| Series A | Aug 7, 2019 | ||||
| Seed | Mar 22, 2018 |
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Key People
Founding team and executive leadership
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SignalWire Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Gaingels | Series B |
| Sequoia Capital | Series A |
| Samsung NEXT Ventures | Series B, Series A |
| Storm Ventures | Series B, Series A |
| Samsung Next TLV | Series B, Series A |
| Aramco Ventures | Series B |
| Samsung NEXT Fund | Series B, Series A |
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Market signals
Structured signals derived from secondary market and firmographic data.
- Aug 7, 2025
Launched an Open Source SDK and Reference App for communications and Voice AI.
- Aug 6, 2025
Alpha version of Sigmond AI agent is now available.
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SignalWire 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 SignalWire's valuation, stock price, and market status.
Is SignalWire a public or private company?
SignalWire is a private company.
What is the current stock price of SignalWire?
SignalWire is a private company, so its shares have no public market price. Caplight tracks SignalWire's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is SignalWire worth (valuation)?
Valuation information for SignalWire is not publicly available.
Can I buy SignalWire stock?
SignalWire shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was SignalWire's last funding round?
SignalWire's most recent funding round was Series B Extension on March 23, 2022.
Who are the main investors in SignalWire?
Key investors in SignalWire include Storm Ventures, Aramco Ventures, T-Mobile Ventures, Storm.
Will SignalWire IPO soon?
No public IPO plans have been announced for SignalWire.
How can I track SignalWire secondary market activity?
Caplight tracks bids, offers, and trades in SignalWire's shares on secondary markets.