# Heidi Zak

> Heidi Zak is a seed investor in San Francisco backing E-Commerce and Retail. See 6 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Location: San Francisco, United States
- Total investments: 6
- Last investment: Aug 2020
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/heidizak
- X (Twitter): https://twitter.com/heidizaks
- Website: https://x.com/heidizaks
- Facebook: https://www.facebook.com/heidizak

Heidi Zak is a seed investor in San Francisco focused on E-Commerce and Retail. A few years ago, Heidi Zak left Google with the dream of building a new kind of bra company. Fueled by her passion for retail and frustrated with her own experience trying to find a bra that fit, she knew there was opportunity to reinvent the way women get measured and shop for bras. One app and hundreds of great-fitting bras later, they think shemight be onto something.

## Contacts

5 contacts available for Heidi Zak: 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/heidi-zak?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $1.3M–$2.1M |
| Series A | $2.5M–$14M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| E-Commerce | 5 | 83% |
| Retail | 3 | 50% |
| Fashion | 3 | 50% |
| Lifestyle | 3 | 50% |
| Shoes | 1 | 17% |

11 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 4 | 67% |
| Series A | 2 | 33% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Stix | Stix is a female-founded, no-judgment health brand with the products, content, and community to make informed decisions. Venture for America alumnae Cynthia Plotch and Jamie Norwood created Stix because buying a high-quality pregnancy or ovulation test should be easy and judgment-free, no matter the result they looking for. Stix tests are over 99%accurate, fairly priced, and delivered in a discreet envelope. Stix also offers The Library, the ultimate resource for your most googled health questions. | $1.3M | Seed | Aug 05, 2020 | https://getstix.co/ |
| Crown Affair | Crown Affair is a haircare brand that develops haircare products and hair tools for daily maintenance, styling, and scalp care routines. The company offers shampoos, conditioners, hair oils, styling creams, repair treatments, towels, combs, and brushes intended to support different hair textures and care preferences. Its product line includessulfate-free and paraben-free formulations, along with non-aerosol styling and cleansing products for scalp and strand management. The company also provides educational content and haircare guidance focused on washing, air drying, hydration, detangling, and long-term hair maintenance practices. Crown Affair distributes products through direct-to-consumer channels and retail partnerships while supporting digital tools such as hair quizzes and product matching experiences. Its offerings are used for everyday hair cleansing, conditioning, repair, styling, and texture management across multiple hair types. | $1.7M | Seed | Jan 28, 2020 | https://www.crownaffair.com/ |
| Anomalie | Anomalie designs and sells custom wedding gowns. Anomalie makes any wedding dress with top-quality materials and craftsmanship. | $13.6M | Series A | Mar 01, 2019 | http://dressanomalie.com/ |
| Birdies | Founded in 2015 by Bianca Gates and Marisa Sharkey, Birdies is a female-founded footwear brand that was born out of a need for stylish, comfortable shoes to wear inside the home. The brand has evolved for versatile everyday use, offering a range of signature styles that combine the support of a sneaker, the softness of a slipper, and the style of adesigner flat, all featuring the company’s exclusive 7-layer comfort technology. | $2.1M | Seed | Sep 12, 2017 | http://birdies.com/ |
| Sustain | Sustain is the first brand of all-natural, vagina-friendly essentials. They make everything from tampons to condoms to lubricants. From tampons to condoms, to lubricants, most products contain unhealthy ingredients that can do your body harm. At Sustain, we're committed to always putting your health first, which means our products are better,healthier, and more vagina-friendly than traditional brands. Bonus points that they're better for Mother Earth as well. | $2.5M | Series A | Feb 23, 2016 | http://sustainnatural.com |
| MM.LaFleur | MM.LaFleur offers its users with an e-commerce website. It sells a wide range of branded clothes, jewelries, gift cards, and accessories for women. The company has its offices across the U.S. that allows its users to order customized bento boxes, comprising 4 to 6 wardrobe staples that includes dresses, separates, knits, or accessories.MM.LaFleur is a U.S.-based company which was founded in 2011 by Narie Foster, Miyako Nakamura, and Sarah LaFleur. |  | Seed | Jun 19, 2014 | http://mmlafleur.com |

6 of 6 investments shown.

## Co-investors
- [Amplifyher Ventures](https://shizune.co/investors/profile/amplifyher-ventures) — VC Fund, 1 deal together
- [ARC Angel Fund](https://shizune.co/investors/profile/arc-angel-fund) — VC Fund, 1 deal together
- [1745 Ventures](https://shizune.co/investors/profile/bertelsmann-digital-media-investments) — VC Fund, 1 deal together
- [Brand Foundry Ventures](https://shizune.co/investors/profile/brand-foundry-ventures) — VC Fund, 1 deal together
- [Fab Co-Creation Studio Ventures](https://shizune.co/investors/profile/fab-co-creation-studio-ventures) — VC Fund, 1 deal together
- [Finn Capital Partners](https://shizune.co/investors/profile/finn-capital-partners) — VC Fund, 1 deal together

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## Featured in investor lists
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## FAQ

### What does Heidi Zak invest in?

Heidi Zak invests primarily in E-Commerce, Retail and Fashion startups, most often at Seed and Series A stage. Most of the 6 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Heidi Zak's check size?

Heidi Zak typically joins rounds of $1.3M–$2.1M at Seed and $2.5M–$14M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Heidi Zak participates in.

### How do I contact Heidi Zak?

Public channels for Heidi Zak include LinkedIn, X (Twitter) and the website linked on this profile. 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 Heidi Zak last invest?

The most recent investment recorded for Heidi Zak closed in Aug 2020. Shizune tracks 6 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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