Benjamin Sun
Co-Founder & General Partner @ Primary Venture Partners
New York, United States
Benjamin Sun is a seed investor at Primary Venture Partners in New York focused on E-Commerce and Pet. Ben is a co-founder and General Partner at Primary. Forbes' Midas List ranks him as one of the top 100 tech investors in the world. His founder-first approach originates from having been one: His experiences co-founding Community Connect, one of the first social networking companies, and LaunchTime, an incubator, inform how he supportsfounders in the portfolio.Ben focuses his investing activities on primarily consumer-facing companies. Ben has been active in the NYC tech community for over 20 years. Prior to becoming an entrepreneur and investor, Ben worked at Merrill Lynch in the Technology Investment Banking Group.He earned a BA degree in Economics from the University of Michigan.
- Total investments:
- 16
- Last investment:
- Lead investor:
- 25%
Last updated:
For AI agents: llms.txt
Industries Benjamin Sun invests in
Stages Benjamin Sun invests in
Countries Benjamin Sun invests in
Contacts
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Investment Focus
Industry
- E-Commerce 4 (25%)
- Pet 2 (13%)
- SaaS 2 (13%)
- Internet 2 (13%)
- Food and Beverage 2 (13%)
Stage
- Seed 7 (44%)
- Series A 3 (19%)
- Series B 2 (13%)
- Series C 1 (6%)
- Funding Round 1 (6%)
Country
- United States 8 (50%)
- South Korea 1 (6%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Small Door provides veterinary services that are elevated, customer-centric, and hospitality-infused. The company provides superior care, unrivaled transparency, and tech-enabled convenience to help pets and pet parents live better lives together. Founded in 2017, Small Door is headquartered in New York. | Jul 29, 2025 | ||
| Small Door provides veterinary services that are elevated, customer-centric, and hospitality-infused. The company provides superior care, unrivaled transparency, and tech-enabled convenience to help pets and pet parents live better lives together. Founded in 2017, Small Door is headquartered in New York. | $35M / Series C / Jul 29, 2025 | ||
| Small Door provides veterinary services that are elevated, customer-centric, and hospitality-infused. The company provides superior care, unrivaled transparency, and tech-enabled convenience to help pets and pet parents live better lives together. Founded in 2017, Small Door is headquartered in New York. | $40M / Series B / Dec 14, 2022 | ||
| Small Door provides veterinary services that are elevated, customer-centric, and hospitality-infused. The company provides superior care, unrivaled transparency, and tech-enabled convenience to help pets and pet parents live better lives together. Founded in 2017, Small Door is headquartered in New York. | $20M / Series A / Apr 15, 2021 | ||
| Kindred is a professional network built to prepare executives for the future of socially responsible business. Organizations are being held accountable for action on issues that include diversity, equity, inclusion, allyship, sustainability, violence, poverty, nutrition, education, and mental health. Kindred helps its members more intelligently andurgently close the gap between intent and action by providing access to a collaborative network of their peers, to renowned experts and training, and to the information, analysis, data, and research they need to make increasingly important decisions.Launched in 2020, Kindred’s membership has quickly grown to include leaders from companies such as Allbirds, B Lab, Casper, Chobani, Facebook, HBO, LinkedIn, Macy's, MassMutual, Meredith, Salesforce, Spotify, Twitter, Verizon, The Washington Post, and Wells Fargo. | $5.2M / Seed / Dec 26, 2019 | ||
| CozyKin provided personal care by matching families to share a Montessori-trained nanny with modern tools. The platform raised over $8 million in venture capital and was acquired by Higher Ground Education in 2020.“Who will take care of my baby when I go back to work?” Millions of new mothers in America asked this question every year as theyincreasingly plan to return to the workforce earlier and earlier. Millennial families struggle to find the right care due to the shortage of childcare, complexity of the search and their increasing desire for cognitively-appropriate care. CozyKin ran the two-sided market between new families and great nannies. Families were grouped based on location, schedule and preferences. CozyKin-employed nannies cared for 2-3 infants at the same time in the private home of these families.For parents, we delivered better quality, convenience, socialization and value than daycares or nannies. We backed this up with easy-to-use tech, 24/7 customer support and our 100% satisfaction guarantee. | $6M / Series A / May 20, 2019 | ||
| Small Door provides veterinary services that are elevated, customer-centric, and hospitality-infused. The company provides superior care, unrivaled transparency, and tech-enabled convenience to help pets and pet parents live better lives together. Founded in 2017, Small Door is headquartered in New York. | $3.5M / Seed / Apr 30, 2019 | ||
| Kindred is a professional network built to prepare executives for the future of socially responsible business. Organizations are being held accountable for action on issues that include diversity, equity, inclusion, allyship, sustainability, violence, poverty, nutrition, education, and mental health. Kindred helps its members more intelligently andurgently close the gap between intent and action by providing access to a collaborative network of their peers, to renowned experts and training, and to the information, analysis, data, and research they need to make increasingly important decisions.Launched in 2020, Kindred’s membership has quickly grown to include leaders from companies such as Allbirds, B Lab, Casper, Chobani, Facebook, HBO, LinkedIn, Macy's, MassMutual, Meredith, Salesforce, Spotify, Twitter, Verizon, The Washington Post, and Wells Fargo. | $3M / Seed / Feb 28, 2019 | ||
| SimpleReach is the #1 way for brands to measure and improve content ROI. By bringing together hundreds of data sources across websites, social channels, and publishers into the world's largest content data cloud, SimpleReach enables brands to understand how their content drives business outcomes everywhere. Leading content marketers likeIntel, Chase, and Home Depot rely on the SimpleReach platform to generate actionable insights that improve the impact of their content creation and distribution. Learn more at www.simplereach.com | $13.6M / Series B / Apr 21, 2017 | ||
| Mirror is a connected fitness system that streams live and on-demand classes to users in-home through a sleek responsive display. Its connected fitness platform streams live and on-demand classes to users in-home, which the content is then personalized in real-time using a combination of user feedback and biometric data that enable users to receiveaccess to a selection of live and on-demand classes across a variety of genres, including cardio, strength training, and yoga.Mirror was established in 2016 and is headquartered in New York. | $2.8M / Seed / Nov 22, 2016 | ||
| See all 16 investments → | |||
Co-Investors
About Primary Venture Partners
Primary is the premier early stage venture firm working alongside founders to build unicorns like Alloy, Chief, Electric, K Health, Slice, Vestwell, and many more. The firm takes a low-volume, high-conviction approach—and devotes unreasonable resources toward making sure founders can succeed. With an Impact team that outnumbers investors 2:1, operational experts spend 100% of their time making hires, signing customers, and enabling future fundraising to supercharge growth. This partnership with top-tier founders makes companies in Primary’s portfolio 2x more likely to raise a Series A and 19x more likely to reach a billion-dollar-plus valuation—a third of Fund I companies are unicorns, less than a decade out. We’re always excited to meet 99th-percentile founders building in B2B SaaS, built world, fintech, healthcare, infrastructure, and supply chain. And while we have a home court advantage in NYC, we invest globally, at pre-seed through A.
Primary Venture Partners Contacts
| Name | Phone | Socials | |
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Anne Lysak
VP, Finance & Operations
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Benjamin Sun
Co-Founder & General Partner
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Brad Svrluga
General Partner & Co-Founder
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Brian Schechter
Partner
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Cassie Young
General Partner
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FAQ
What does Benjamin Sun invest in?
Benjamin Sun invests primarily in E-Commerce, Pet and SaaS startups, most often at Seed and Series A stage. Most of the 16 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact Benjamin Sun?
Public channels for Benjamin Sun 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 Benjamin Sun last invest?
The most recent investment recorded for Benjamin Sun closed in Jul 2025. Shizune tracks 16 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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