SignalWire
PrivateLast Round
Series B
Extension
Mar 23, 2022
Total Funding Raised
$41.5M
Company Overview
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, Enterprise Communication, NLP & Conversational AI, Platform-as-a-Service, VoIP
Business Model
B2B
Customer Profile
Usage-Based SaaS, Services & Consulting
AI Layer
Infrastructure
Keywords
Historical Pricing
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SignalWire Comparables
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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 |
SignalWire Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| 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 |
| T-Mobile Ventures | Series B, Series B Extension |
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.
SignalWire Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
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Request accessFrequently 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 with no public stock price. No recent secondary market data is available.
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. Visit https://www.caplight.com to learn more.
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 for private companies. Visit https://www.caplight.com to monitor SignalWire's secondary market activity and sign up for updates.