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Joseph Ruscio

Investor

General Partner at Heavybit

San Francisco

Writes $500K – $5M checks · typically $2.5M

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About

General partner at Heavybit with a background in academia, startup management, and venture capital, focused on helping practitioner-first teams scale go-to-market and organizations. Works with startups such as Tailscale, Localstack, Groundcover, and Partnerpage.

Invests in

AI & Machine LearningCybersecurityData & InfrastructureDeveloper ToolsEnterprise Software

Beyond investing

Founded
Helped found Librato, where he continues to work as an engineer.
Hobbies
Enjoys running, snowboarding, and home-brewing in his spare time.
Pets
Has cats.
Family
Lives in San Francisco with his wife Jory and their cats.
More
Authored and released the open-source Ruby 'Aggregate' statistics gem.

From Joseph's own website — common ground for a warm intro.

Deals · 5

Devenue Inc.Board seat

via Heavybit · filed Jun 2026 · $11.3M raise

L9 Labs Inc.Board seat

via Heavybit · filed Dec 2025 · $6M raise

Exceptional, Inc.Board seat

via Heavybit · filed Nov 2023 · $3.2M raise

StreamfoldBoard seat

via Heavybit · filed Nov 2022 · $3.2M raise

Highly Valued, Inc.Board seat

via Heavybit · filed Feb 2022 · $3.7M raise

Attribution from SEC filings, press coverage, and firm rosters.

Other disclosed investments

Sources: SEC Form D filings · curated public sources.

Writing

All posts ↗

Joseph Ruscio writes technical Linux and development how-tos, including setting up a signed APT repository with reprepro, expanding an LVM disk on a VMware Fusion Fedora guest, and releasing a Ruby statistics-aggregation gem.

Setting up an APT Repository2010-08-19

A step-by-step guide to building a signed APT repository with reprepro for Librato's Silverline, covering package version naming across distros, GPG key setup, and reprepro configuration.

Increasing hard disk size with LVM on VMWare Fusion Linux guest2009-12-08

A procedure for expanding a Fedora LVM guest's disk in VMware Fusion, covering resizing the virtual disk, creating a partition, extending the volume group, and resizing the ext3 filesystem.

Aggregate statistics gem released!2009-09-13

Announces the release of Aggregate, a Ruby gem that computes streaming statistics and histograms without storing individual sample values, with usage examples and output.

Colleagues at Heavybit

Adam Jahnke
Other at Heavybit
Amir Zohrenejad
Founder at Dataherald
Amir Zohrenejad
Part-time Partner at Heavybit
Andrea Echstenkamper
VP of Marketing at Heavybit
Andrew Park
Content and Communications at Heavybit
Dana Oshiro
Partner at Heavybit
Diana Reyes
Other at Heavybit
Isabelle Smith
Events Coordinator at Heavybit

Network3

Amit Agarwal
General Partner at ICONIQ Capital
Andy McLoughlin
Brit in San Francisco; seed-stage venture capital investor
Benjamin Metcalfe
General Partner at Monochrome Capital

Investors connected to Joseph in public investor directories — a warm-intro map.

Frequently asked questions

Who is Joseph Ruscio?
General partner at Heavybit with a background in academia, startup management, and venture capital, focused on helping practitioner-first teams scale go-to-market and organizations. Works with startups such as Tailscale, Localstack, Groundcover, and Partnerpage.
Where does Joseph Ruscio work?
Joseph Ruscio is General Partner at Heavybit.
What does Joseph Ruscio invest in?
Joseph Ruscio invests in AI & Machine Learning, Cybersecurity, Data & Infrastructure, Developer Tools, Enterprise Software.
What check size does Joseph Ruscio write?
Joseph Ruscio typically writes checks of $500K – $5M.
What boards does Joseph Ruscio sit on?
Joseph Ruscio holds tracked board seats at Devenue Inc., Exceptional, Inc., Highly Valued, Inc., L9 Labs Inc., Streamfold.
What companies has Joseph Ruscio invested in?
Investments tracked here include Aserto, Circleci, Crunchy Data, Duckbill, Jeli.io, Kosli, Metrist, Milestone, Modiqo, Orbit, Radar Labs, Reo.Dev, and 6 more.
What has Joseph Ruscio written?
Joseph Ruscio has 3 tracked posts on joseph.ruscio.org, including "Setting up an APT Repository", "Increasing hard disk size with LVM on VMWare Fusion Linux guest", "Aggregate statistics gem released!".

About this profile. Compiled from public sources — Heavybit's own website, regulatory filings, press coverage and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights