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Signal by NFX
Palo Alto, California, USA
What it is
Signal by NFX is a free web-based investing network for founders, venture capitalists, scouts, and angels. Founders can search for potential investors by sector, stage, and investor quality, identify existing investor relationships, and track fundraising follow-ups. Investor profiles may show past investments, investing philosophy, expertise areas, and target criteria. Investor Search data is crowdsourced by founders, accelerators, and VC associates and updated through community feedback. Founders can connect Gmail through OAuth to locate relationships; Signal says it uses header metadata such as sender, receiver, and date, not email content. Direct outreach is available through an email provider when a founder is already in an investor’s trusted network. Investors can privately collaborate through Preferred Co-Investor Lists, but investors cannot browse founders seeking investment. Investors request access by creating an Investing Profile, and Signal says listed investors are vetted by founders and other investors.
For and against
For
- Free plan with no charge
- Search by sector, stage, and investor quality
- Investor profiles include investment criteria
- Gmail relationship discovery uses OAuth
- Community-updated investor data
Against
- Investors cannot browse founders
- Contact details are not provided
- Investor access requires an invite request
- No free trial is offered
The verdict
Signal combines investor profiles, relationship discovery, and fundraising follow-up tools in a browser service. Founders get the broadest browsing and outreach role, while investors use the platform mainly after requesting access.
Who it suits
Signal suits founders researching investors and organizing fundraising outreach. It also fits investors, scouts, and angels who want to request access and collaborate privately on deals.
Plans and prices
Free
100% free tool; no charge
Read 8 Oct 2026 · signal.nfx.com
On the record
- Access limits
- Investors, VCs, scouts, and angels request an invite by creating an Investing Profile, and Signal says listed investors are vetted by founders and other investors.signal.nfx.com · read 8 Oct 2026
- Co-investor lists
- Investors can privately share and collaborate on deals using a Preferred Co-Investor List.signal.nfx.com · read 8 Oct 2026
- Contacting investors
- Founders can contact an investor directly through an email provider and contact list such as Gmail when they are already in that investor’s trusted network.signal.nfx.com · read 8 Oct 2026
- Email access
- Signal says it uses Gmail header metadata such as sender, receiver, and date, and does not access email content.signal.nfx.com · read 8 Oct 2026
- Fundraising tools
- For founders, Signal identifies potential-fit investors, uncovers existing investor contacts, and tracks fundraising follow-ups.signal.nfx.com · read 8 Oct 2026
- Gmail connection
- Users can connect Gmail through OAuth to find existing investor relationships, and founders can add several Gmail accounts in Account Settings.signal.nfx.com · read 8 Oct 2026
- Investor data
- Investor Search data is crowdsourced by founders, accelerators, and VC associates and is continuously updated by community feedback.signal.nfx.com · read 8 Oct 2026
- Investor profiles
- Investor profiles can highlight past investments, investing philosophy, sectors of expertise, and target investment criteria.signal.nfx.com · read 8 Oct 2026
- Maker
- NFX Guild Labs is described as the software arm of NFX Guild, an early-stage venture firm in the San Francisco Bay Area, building free-to-use online tools for the startup ecosystem.signal.nfx.com · read 8 Oct 2026
- Purpose
- Signal is a community-driven investing network for founders, VCs, scouts, and angels that helps founders find investors by sector, stage, and investor quality.signal.nfx.com · read 8 Oct 2026
- Security
- Signal says its security architecture and procedures align with SOC 2 standards and that it is a Google API verified application.signal.nfx.com · read 8 Oct 2026
- Support
- Signal directs users with questions to [email protected].signal.nfx.com · read 8 Oct 2026
- Who can browse
- Signal is for founders seeking investors to browse investor profiles; investors cannot browse founders and startups there to invest in them.signal.nfx.com · read 8 Oct 2026
