Organization · Venture Capital
WindSail Capital Group LLC
WindSail Capital Group LLC is a Boston-based investment firm focused on growth capital for companies advancing sustainable technologies. It primarily invests in clean economy sectors through secured loans and selective equity.
Overview
What WindSail Capital Group LLC does
What WindSail Capital Group LLC is
WindSail Capital Group LLC is a Boston-based investment firm focused on growth capital for companies advancing sustainable technologies. It primarily invests in clean economy sectors through secured loans and selective equity.
How it participates in the startup ecosystem
The current public profile supports funder capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.
Operational profile
Organization status and context
Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.
- Operational status
- Active
- Organization type
- Venture Capital
- Founded
- Founded in 2015
- Approximate age
- About 11 years
- Structured capabilities
- Funder
- Last reviewed
- April 30, 2026
Official channels
Find WindSail Capital Group LLC elsewhere
Open the official website or a supported primary organization account.
Capability profile
WindSail Capital Group LLC as a funder
Investment thesis
WindSail Capital focuses on investing in companies advancing energy innovation and sustainability, providing flexible growth capital through secured loans and selective equity to address the unique needs of clean economy companies.
Focus narrative
WindSail Capital invests in sectors related to sustainability, including energy, water, food, and transportation. The firm targets companies at various stages of development, from early-stage startups to more established businesses, emphasizing the importance of revenue generation and a clear path to cash-flow breakeven.
Value beyond capital
WindSail Capital provides value to its portfolio companies through flexible financing solutions tailored to their specific needs, including senior secured loans and occasional equity investments. The firm emphasizes downside protection and supports companies in achieving cash-flow breakeven, leveraging its expertise in the clean economy sector.
Terms and economics
- Typical check
- $2,000,000–$5,000,000
Focus and fit
- Stages
- Pre-seed · Seed · Seed+ · Series A · Series B · Series C · Series D · Growth Equity
- Regions
- United States
Availability
- Currently deploying
- Yes
Portfolio and track record
- Recorded portfolio count
- 15
Portfolio context
Notable portfolio companies include: BluePath: Sustainable technology solutions. Crate: Innovative product development. Congruitive: Advanced technology applications. Go Electric: Energy management solutions. Sighten: Solar software solutions. Lumigrow: LED lighting solutions for agriculture. Blueingreen: Sustainable water solutions. Lifecycle Renewables: Renewable energy projects. HercuTech: Sustainable materials innovation. Cambrian Innovation: Wastewater treatment technologies. Purple Carrot: Plant-based meal delivery services. Flowcastings: Advanced manufacturing technologies. Locomobi: Smart parking solutions. Wespire: Employee engagement through sustainability. Bright Power: Energy management and efficiency. Genera: Sustainable agricultural solutions. Nanoramic: Advanced battery technologies.
Common questions
What to know about WindSail Capital Group LLC
Upseed classifies WindSail Capital Group LLC under the Venture Capital organization type. Its current public profile includes funder capabilities.
Source and update disclosure
Know what this page is based on
Source basis
Public organization and program material, official websites, and structured Upseed records.
Last reviewed
April 30, 2026
Known limits
Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.
Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.