# Steli Efti

> Steli Efti is a seed investor backing Podcast and Subscription Service. See 1 investment, round sizes, portfolio and contact details. Updated Nov 2026.

- Type: Angel Investor
- Location: San Francisco, United States
- Total investments: 1
- Last investment: Feb 2020
- Lead investor: 0%
- Last updated: Nov 2026
- LinkedIn: http://www.linkedin.com/in/steliefti
- X (Twitter): http://twitter.com/steli
- Facebook: http://www.facebook.com/steliefti

Steli Efti is a seed investor in San Francisco focused on Podcast and Subscription Service. Steli is CEO and Co-Founder of Close.io (a platform that makes calls, sends emails, and conveniently automatically tracks all activity) and ElasticSales, where he helps thousands of startups succeed in scaling their sales efforts. He is an alumni of Y Combinator (they helped making companies like Dropbox, Airbnb, 9gag, and more). His companyhas received funding from Spark Capital, SV Angel, Start Fund, and Omidyar Networks as well as several notable angel investors.

## Contacts

5 contacts available for Steli Efti: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/steli-efti?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Podcast | 1 | 100% |
| Subscription Service | 1 | 100% |

## Investments

| Company | Description | Round size | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Supercast | Supercast is a startup that helps podcast creators make money off premium subscriptions. | $2M | Seed | Feb 25, 2020 | https://www.supercast.com/ |

1 of 1 investments shown.

## Co-investors
- [Conconi Growth Partners](https://shizune.co/investors/profile/conconi-growth-partners) — VC Fund, 1 deal together
- [Form Capital](https://shizune.co/investors/profile/form-capital) — VC Fund, 1 deal together
- [Tiny Capital](https://shizune.co/investors/profile/tiny-capital) — VC Fund, 1 deal together

## Similar investors

### Similar industry
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund
- [SV Angel](https://shizune.co/investors/profile/sv-angel) — VC Fund
- [SOSV](https://shizune.co/investors/profile/sosv) — VC Fund

### Similar stage
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- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

### Similar country
- [BDC Venture Capital](https://shizune.co/investors/profile/bdc-venture-capital) — VC Fund
- [Real Ventures](https://shizune.co/investors/profile/real-ventures) — VC Fund
- [Business Development Bank of Canada](https://shizune.co/investors/profile/business-development-bank-of-canada) — VC Fund

## Featured in investor lists
- [Media (entertainment) Angel Investors in Canada](https://shizune.co/investors/media-entertainment-angel-investors-canada)

## FAQ

### What does Steli Efti invest in?

Steli Efti invests primarily in Podcast and Subscription Service startups, most often at Seed stage. Most of the 1 investments tracked by Shizune back companies in Canada. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Steli Efti?

Public channels for Steli Efti include LinkedIn, X (Twitter) and Facebook. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### When did Steli Efti last invest?

The most recent investment recorded for Steli Efti closed in Feb 2020. Shizune tracks 1 investment 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 Nov 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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