Walter Winshall
Angel Investor
Boston, United States
Walter Winshall is a seed investor in Boston focused on Software and SaaS. Walter A. Winshall is the Founder of Collaborative Seed and Growth Partners.
- Total investments:
- 53
- Last investment:
- Lead investor:
- 6%
Last updated:
For AI agents: llms.txt
Industries Walter Winshall invests in
Stages Walter Winshall invests in
Countries Walter Winshall invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $250k–$2.7M
- Angel
- $223k–$630k
- Series A
- $1.2M–$7M
Investment Focus
Industry
- Software 9 (17%)
- SaaS 8 (15%)
- Finance 7 (13%)
- Education 7 (13%)
- Health Care 6 (11%)
Stage
- Seed 26 (49%)
- Series A 7 (13%)
- Angel 4 (8%)
- Convertible Note 4 (8%)
- Pre-Seed 3 (6%)
Country
- United States 38 (72%)
- France 1 (2%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| RISE Robotics is a technology company that develops fluid-free motion control systems for heavy machinery. The company makes the electrification, teleoperation, and automation of heavy machinery economically viable using its hydraulic replacement technology called Beltdraulic. It is a belt-and-pulley-based linear actuation technology thatreplicates—and in some cases surpasses—the force and precision of hydraulic systems, without using oil. This innovation enables machines to operate faster, more efficiently, and with lower emissions while reducing operational costs.RISE Robotics also offers design and implementation support, working closely with OEMs, Tier 1 suppliers, and the U.S. Department of Defense to integrate Beltdraulic solutions into existing systems. Its mission emphasizes boosting machine productivity, reducing maintenance needs, and promoting environmental sustainability through cutting-edge actuation technology. | $1.5M / Series A / Apr 24, 2025 | ||
| Their vision is to provide easy access to stock market news analysis to investors. Understanding market sentiment trends is an important element in managing one’s stock portfolio.StockSnips crawls, aggregates and analyzes news related to public companies listed on Nasdaq and NYSE. It reads 50,000 articles a day and filters out the noise andanalyzes news sentiment. StockSnips enables you to gain stock insights and track a company’s financial and business operations. It categorizes news snippets by key performance indicators like revenue, sales, earnings. | $425K / Seed / Dec 12, 2022 | ||
| Avanlee Care is a healthcare technology company revolutionizing how health plans engage with caregiving families. Our mission is to empower informal caregivers, recognizing their vital role in delivering high-quality care and improving health outcomes. By bridging the gap between health plans and caregiving families, we help Medicare Advantageplans enhance patient outcomes, improve caregiver well-being, and achieve measurable value through reduced costs and improved Star Ratings. | Seed / Feb 01, 2021 | ||
| Rheaply provides procurement management software to buy, sell, trade, donate, and rent resources. Its platform develops the exchange technology for researchers to share their ideas and surplus resources with colleagues to reduce time, costs, as well as environmental waste that enable clients to help lower procurement and storage costs and reducewaste.The company was founded in 2015 and is headquartered in Chicago, Illinois. | $2.5M / Seed / Mar 17, 2020 | ||
| StoryFit puts the power of artificial intelligence in the hands of publishers and studios.StoryFit is a technology company that delivers artificial intelligence insights and solutions for the book publishing, movie, and television production industries. The name StoryFit comes from that simple idea: know how your story fits in the landscape; finda story to fit your audience, and an audience that fits your story. It represents their motivation and their promise to their customers: to support creative decision-makers in their production of memorable stories by providing the smartest, most adaptable, and most dynamic machine learning insights to narrative content available. | Series A / Dec 11, 2019 | ||
| Circle is an AI data management and customer relationship SaaS platform that makes it easier for our customers, health plans, value-based care providers, and brokers to get rewarded for better serving their members. | $800K / Pre-Seed / Dec 04, 2018 | ||
| Circle is an AI data management and customer relationship SaaS platform that makes it easier for our customers, health plans, value-based care providers, and brokers to get rewarded for better serving their members. | $800K / Pre-Seed / Oct 29, 2018 | ||
| We immerse distributed teams into the same VR workplace to maximize productivity. | $340K / Pre-Seed / Dec 25, 2017 | ||
| Mainstay is a developer of a chatbot platform that boosts enrollment, persistence, and completion at hundreds of colleges and universities. The company uses artificial intelligence and machine learning to facilitate the path to and through college. Specifically, Mainstay developed Oli, a chatbot that combines AI with human experts to provide freecollege guidance to all students. For their college partners, it eliminates repetitive tasks, helps colleges meaningfully engage students at scale, and provides deep insights into their pipeline of prospects. | $250K / Seed / Dec 15, 2016 | ||
| Mainstay is a developer of a chatbot platform that boosts enrollment, persistence, and completion at hundreds of colleges and universities. The company uses artificial intelligence and machine learning to facilitate the path to and through college. Specifically, Mainstay developed Oli, a chatbot that combines AI with human experts to provide freecollege guidance to all students. For their college partners, it eliminates repetitive tasks, helps colleges meaningfully engage students at scale, and provides deep insights into their pipeline of prospects. | $728K / Convertible Note / Aug 14, 2016 | ||
| See all 53 investments → | |||
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FAQ
What does Walter Winshall invest in?
Walter Winshall invests primarily in Software, SaaS and Finance startups, most often at Seed and Series A stage. Most of the 53 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 Walter Winshall's check size?
Walter Winshall typically joins rounds of $250k–$2.7M at Seed, $223k–$630k at Angel and $1.2M–$7M 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 Walter Winshall participates in.
How do I contact Walter Winshall?
Public channels for Walter Winshall include LinkedIn and X (Twitter). 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 Walter Winshall last invest?
The most recent investment recorded for Walter Winshall closed in Apr 2025. Shizune tracks 53 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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