# Elaine Zelby

> Elaine Zelby is a seed investor at SignalFire backing Artificial Intelligence and SaaS. See 3 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [SignalFire](https://shizune.co/investors/profile/signal-fire)
- Location: San Francisco Bay Area, United States
- Total investments: 3
- Last investment: Jun 2022
- Lead investor: 33%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/elainezelby
- X (Twitter): https://twitter.com/ezelby
- Website: https://zelby.substack.com
- Facebook: https://www.facebook.com/ezelby

Elaine Zelby is a seed investor at SignalFire in San Francisco Bay Area focused on Artificial Intelligence and SaaS. Elaine joined Signalfire in 2018 and is a Partner on the investment team focused on early-stage deals. She also runs the growth and GTM programs for the portfolio. Prior to joining SignalFire, Elaine led Growth Marketing and Product Marketing teams at ConsenSys, Slack, and Capriza.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Artificial Intelligence | 2 | 67% |
| SaaS | 1 | 33% |
| Software | 1 | 33% |
| Machine Learning | 1 | 33% |
| Data Visualization | 1 | 33% |

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 2 | 67% |
| Pre-Seed | 1 | 33% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| TestBox | TestBox revolutionizes the software sales process by enabling teams to create instant, AI-powered demo environments filled with intelligent, customized data that perfectly mirrors each prospect's unique business context. With seamless integrations and powerful analytics, TestBox empowers sales teams to showcase their product's fullpotential while gaining invaluable insights into prospect engagement, ultimately transforming traditional demos into dynamic, personalized experiences that close deals faster. | $10M | Seed | Jun 08, 2022 |  |
| Included | Included is a platform that drives DEI results at every stage of a company's employee lifecycle. Included is an AI startup on a mission to revolutionize the DEI space, building tools that automatically gather demographics data across the entire organization, utilizing a machine learning-driven projection engine to spot trends, makerecommendations, and track goals. | $3.5M | Seed | May 19, 2022 |  |
| Included | Included is a platform that drives DEI results at every stage of a company's employee lifecycle. Included is an AI startup on a mission to revolutionize the DEI space, building tools that automatically gather demographics data across the entire organization, utilizing a machine learning-driven projection engine to spot trends, makerecommendations, and track goals. | $1.9M | Pre-Seed | Nov 11, 2021 |  |

3 of 3 investments shown.

## Co-investors
- [Flying Fish Partners](https://shizune.co/investors/profile/flying-fish-venture-partners) — VC Fund, 2 deals together
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund, 1 deal together
- [Ascend](https://shizune.co/investors/profile/ascend-vc) — VC Fund, 1 deal together
- [Felicis](https://shizune.co/investors/profile/felicis-ventures) — VC Fund, 1 deal together
- [Firstminute Capital](https://shizune.co/investors/profile/firstminute-capital) — VC Fund, 1 deal together
- [GTMfund](https://shizune.co/investors/profile/gtmfund) — VC Fund, 1 deal together

## About SignalFire

VC Fund · San Francisco, United States

SignalFire is a venture capital firm that invests in seed-stage companies and breakout companies. The company focuses on providing data-driven insights and tailored advisory programs across various sectors, including health, fintech, and cybersecurity.

5 contacts available at SignalFire.

| Name | Title | Profile |
| --- | --- | --- |
| Chris Scoggins | Partner | https://shizune.co/investors/profile/chris-scoggins |
| Elaine Zelby | Venture Partner | https://shizune.co/investors/profile/elaine-zelby |
| Jim Stoneham | Partner | https://shizune.co/investors/profile/jim-stoneham |
| Josh Constine | Principal investor and Head Of Content | https://shizune.co/investors/profile/josh-constine |
| Alex Garden | Venture Partner | https://shizune.co/investors/profile/alex-garden |

## Similar investors

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

## FAQ

### What does Elaine Zelby invest in?

Elaine Zelby invests primarily in Artificial Intelligence, SaaS and Software startups, most often at Seed and Pre-Seed stage. Most of the 3 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Elaine Zelby last invest?

The most recent investment recorded for Elaine Zelby closed in Jun 2022. Shizune tracks 3 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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