Mastry Ventures
San Francisco, CA, United States
Overview
Mastry seeks to invest in the technology sector and also makes investments in real estate.
- Total investments
- 9
- Lead investments
- 6
- Investments · 12mo
- 0
- Active investors
- 4
Investment portfolio
- Meibel
Led · Seed · May 2025
Meibel builds a runtime platform for "confident AI" that sits between data and models to manage ingestion, orchestration, evaluation, and governance for production systems. The platform emphasizes decision traceability, customizable confidence scoring, agentic and adaptive workflows, continuous adaptation without downtime, and execution controls for latency, cost, and quality. Meibel integrates with modern AI infrastructure including model hosts like Hugging Face and Ray and tooling such as LlamaIndex and LangChain, and supports SaaS, private cloud, and on-premises deployments for compliance-sensitive environments. The company cites traction in government, finance, and manufacturing and highlights a SpecBooks case study where Meibel automated complex quoting from architectural plans. Meibel plans to use new funding to grow product and engineering teams, advance core capabilities (orchestration, retrieval, and live feedback), and expand partnerships across industries adopting AI in production.
- Anchor
Led · Series A · Jan 2025
Anchor offers a free-to-use Autonomous Billing & Collections platform that digitizes and automates proposals, agreements, invoicing, billing and payments, moving away from rigid PDF-based workflows. Its digitally native, interactive proposals and agreements consolidate lengthy manual processes into a single system to reduce errors, fraud and delays. Customers commonly see profits increase by over 30%, revenue loss fall from over 5% to under 1%, and agreement signing time drop from over 45 days to less than 24 hours. Anchor serves U.S. professional-service businesses, with particular strength in accounting, bookkeeping, and tax firms, and is trusted by thousands of business owners. The company reported over 500% growth in 2024 and operates a pricing model with no subscription or processing fees, charging a flat $5 per transaction. With the $20M Series A, Anchor plans to double its workforce in the next year, accelerate its U.S. market presence, and deepen strategic partnerships. Anchor, launched this year, automates invoicing, remittance and reconciliation for service providers via a cloud-native platform that executes billing and payments from live online agreements. The system integrates with clients' payment information and service providers' technologies so invoices are automatically populated and sent when services are delivered or bills are due. Anchor's solution is designed to reduce human error and invoice fraud while eliminating manual billing cycles that cause late payments and cash-flow issues. The company positions itself as a foundational, gold-standard element for B2B payments and billing, targeting service-oriented businesses across verticals. Anchor is accelerating growth after securing $15 million in seed funding and plans to expand its team, sign more clients and launch a marketing drive.
- Player’s Health
Participated · Series C · Dec 2024
Players Health offers a data-driven, tech-enabled platform delivering risk management services, reporting tools, and insurance products to youth, recreational, collegiate, and professional sports organizations. Founded by a former professional football player, the company focuses on athlete safety and compliance across the sports ecosystem. It has reached more than 5.5 million youth athletes and counts customers such as USA Softball, American Youth Soccer Organization, and Orangetheory. Players Health will use new funding to advance AI-powered product personalization, pursue strategic M&A to broaden capabilities, and expand its workforce. The company emphasizes standardizing best practices for athlete safety and aims to expand its nationwide reach. Player's Health (Ao1 Holdings Inc.) offers turnkey insurance and risk-management solutions for organized athletics, operating as a managing general underwriter. The company uses proprietary risk-management software and partnerships with sports-management platforms to track protocol evidence and deliver injury-management insights. Its platform provides levels of injury-management and protocol-tracking data previously unavailable in amateur sports. Leadership says the business exists to create safer environments for athletes and to give sports organizations the protection and tools they need. The company aims to grow its business with support from strategic investors. No revenue or user metrics were disclosed in the articles.
- Joya
Led · Seed · Oct 2024
JOYA is the first employee skin health and wellness benefit platform, connecting employees to a network of vetted experts for preventative skin cancer screenings and personalized treatments. The platform blends aesthetics and preventative care to offer convenient, affordable access to both screenings and personalized skincare interventions. JOYA targets access and affordability barriers in the U.S. skin health and wellness market, which the article cites as worth over $30 billion and growing about 10% annually. The company underscores prevention and consumer demand—70% of surveyed people believe skin benefits should be on par with vision and dental care. JOYA plans to use initial capital to expand its team, accelerate product development, grow its market presence, and increase access to providers. The company launched from stealth with a $5M seed round to fund those efforts.
- JOYA
Participated · Seed · Oct 2024
JOYA operates an employee benefit platform that integrates preventative skin cancer screenings with aesthetic and skin‑wellness services by connecting employees to a network of vetted providers. The company emphasizes affordable, preventive care for conditions including anti‑aging, acne, hair loss and other skin issues. JOYA positions itself as the first and only employee benefit dedicated to preventative skin health and wellness and says it ensures 100% of members receive annual skin cancer checks. The U.S. combined skin health and wellness market is valued at over $30 billion and is growing around 10% annually, which JOYA cites as a large addressable market. JOYA will use funding to expand its team, develop product, grow market presence, and increase access to providers. The company is based in Irvine, California.