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The Venture Codex

Underscore VC

131 Oliver Street, 3rd Floor, Boston, MA, 02110, United States

Overview

Underscore VC is an early-stage, Boston-based venture capital firm backing bold entrepreneurs with an aligned community designed to fit each startup's unique needs.

Total investments
61
Lead investments
24
Investments · 12mo
3
Active investors
8

Sector focus

  • Financial Services
  • Information Technology
  • Venture Capital
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Investment portfolio

  • Gander Robotics

    Led · Seed · Apr 2026

    Led by CEO and founder Michael Autery, Gander Robotics develops autonomous rescue systems for maritime operations. Its flagship product, the Autonomous Rescue Swimmer (ARS), uses AI-powered sonar and precision navigation to locate and rescue personnel in man-overboard emergencies. The company reports active engagements across defense, government and commercial maritime sectors, including work with cruise line operators. Gander Robotics plans to use its newly raised Pre-Seed capital to accelerate prototype development and testing. Financially, the company recently closed a $1.1M Pre-Seed round led by Impellent Ventures and Underscore VC. No revenue, user or other operating metrics were disclosed in the announcement.

  • Rexi

    Participated · Seed · Mar 2026

    Rexi provides an AI-native platform that centralizes financial data sources (including Stripe, Adyen, PayPal, NetSuite, QuickBooks and traditional bank accounts) to automate transaction reconciliation. The platform applies no-code reconciliation rules and an AI agent that resolves exceptions while human reviewers approve, and the company reports matching rates of 99.7% and the ability to reduce processes that took days into minutes. Rexi holds SOC 2 Type II certification and currently operates with a seven-person team based in Buenos Aires and a commercial office in New York. The startup was founded in January 2025 by executives with backgrounds at Mercado Libre, Pomelo, FJ Labs and Naranja X. With the proceeds of its $1.2M pre-seed round closed in July 2025, Rexi plans to strengthen product development, scale technical and commercial teams, expand customer acquisition across Latin America and North America, and pursue a Seed raise in the second half of 2026.

  • Slang

    Participated · Series B · Feb 2026

    Founded in 2019, Slang AI has built a custom-trained, agentic voice platform that handles inbound guest calls, books reservations, routes high-value requests and recognizes returning guests, allowing hospitality staff to focus on in-person service. The system operates 24/7 and integrates with tools such as OpenTable, SevenRooms, Tripleseat and Yelp. Slang AI claims a dataset of 25 million calls from 10 million unique guests across more than 2,000 restaurant locations, enabling 95%+ guest satisfaction, a 2× lift in phone reservations and up to 20× ROI for operators. The company has raised $68 million in funding to date and reports a sustainable competitive advantage through its proprietary data moat. Future product plans include deeper AI capabilities, multi-modal experiences, personalized recommendations, post-visit follow-ups and expanded analytics for operators. The new capital will also support scaling of engineering, product and go-to-market teams as demand surges.

  • Hypernatural

    Led · Seed · Jul 2025

    Hypernatural is an AI-powered video creation platform that generates high-quality, bespoke videos in minutes. Its core product offers text-to-finished-video, extensive editing with style updates and regeneration, persistent custom characters, thousands of templates or custom styles, a nearly 2 million-video AI-generated content library, and AI narration and captions. The company serves over a million users and operates a credits-based subscription starting at $12 per month, with higher-tier plans unlocking advanced features. Hypernatural positions itself as a bridge between slow, resource-intensive traditional video production and fragmented AI video models, emphasizing speed, affordability, and consistency. Leadership aims to build a Canva-for-video, with a five-year ambition for AI to be the default way people craft visual narratives. Investors and partners have praised the team’s rapid product development, user growth, and market understanding.

  • CloudZero

    Participated · Series C · May 2025

    CloudZero provides a next-generation cloud cost optimization platform that automates the collection, allocation, and analysis of cloud costs to uncover savings and improve unit economics. It enables engineering-led cost management so companies can understand 100% of their operational cloud spend and connect cloud decisions directly to business outcomes. Customers named in the announcement include Coinbase, DraftKings, Expedia, Moody's, Nubank, Klaviyo, Miro, and Rapid7. The company reported another year of triple-digit growth and announced a $56 million Series C to fund expansion. CloudZero plans to invest the funding in AI-driven cost analytics and forecasting, deeper integrations across developer and finance workflows, and expansion of strategic partners and cloud alliances. The platform is positioned to help enterprises scale efficiently and improve unit economics as AI workloads reshape infrastructure needs. CloudZero provides engineering teams with a unified dashboard that combines cloud billing data with business- and system-level telemetry to show how much an individual product or feature costs. The platform ingests customers’ cloud, platform-as-a-service and software-as-a-service spend, normalizes it into a common data model, and uses hourly cloud spend data plus an AI algorithm to identify “abnormal” spend events. CloudZero plans to use the new funding to expand its platform and scale go-to-market efforts, with an emphasis on savings insights and self-service analytics. The company has over 100 customers, and CEO Phil Pergola said revenue has increased 10x since 2021, though he would not disclose absolute revenue figures. Co-founded by Erik Peterson and Matt Manger nearly 10 years ago, CloudZero positions itself in the FinOps market alongside players such as ProsperOps, Xonai, Vantage, Cast AI, Zesty, and larger vendors like VMware and Apptio. Pergola said demand for the platform is at an "all-time high" as customers focus on profitability and cloud cost visibility. CloudZero is advancing a SaaS-based site reliability platform that identifies system fragility so engineers can proactively optimize reliability. The platform continuously models the changing surface of a cloud system as it operates under pressure and provides insights that deliver trusted reliability. The product is currently in an invite-only beta and the company also announced an open source project, CloudZero Reactor for AWS, which normalizes AWS service metadata and provides an interface to query that information. The Reactor enables the CloudZero platform to model past, present and future states of systems, helping engineers discover and correct emergent behavior and understand its causes. CloudZero will use the funds to open its headquarters in Boston, grow its enterprise SaaS platform, and increase investment in its open source community. The company is led by founder and CEO Erik Peterson and recently closed a $5M Series A.

Team