Signal by NFX review
A free investor discovery tool built around profiles, relationships, and fundraising tracking.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Signal by NFX is a free, community-driven investor network and database for startup founders, venture capitalists, scouts, and angels. Founders can search investors by sector and funding stage, review profiles with investment preferences and past investments, and organize fundraising outreach. The product also supports investor introduction lists, preferred co-investor lists, and rankings by sector and stage.
The Free plan includes investor search, investor profiles, fundraising tracking, and preferred co-investor lists. Its standout workflow connects investor discovery with Gmail-based relationship and introduction-path discovery, helping founders identify connections that may support an introduction. Profiles can include sectors of expertise, target criteria, investment preferences, and past investments. Community-sourced information is described as continuously updated by the Signal community.
Signal runs on the web and integrates with Gmail and Google OAuth. Its focus is relationship-based discovery and fundraising organization rather than a broad prospecting or data-export platform. The published positioning identifies no verified contact details, export, or API access, and describes the integration scope as narrower than tools with broader platform connections. Signal suits founders who want a free way to find relevant investors, assess fit, map Gmail relationships, and track outreach. Teams that require verified contact information, downloadable records, API access, or integrations beyond Gmail should choose another investor database.
Signal by NFX pros and cons
- Where it wins
- Free access to investor search, profiles, and fundraising tracking
- Gmail paths help identify potential investor introductions
- Private co-investor lists and sector rankings support prioritization
- Where it doesn't
- Does not provide verified contact details
- No export or API access
- Integrations are limited beyond Gmail and Google OAuth
Signal by NFX fact sheet, pricing and score →
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update