SumZero Energy Systems

sumzeroenergysystems.com

Holliston, Massachusetts, United States

11-50 employees

LinkedIn Profile

About SumZero Energy Systems

heat pump, building science, heating, cooling, mini split, ductless, vrf, residential, light commercial, mass save programs, home renovation, consulting, whole-home heat pump retrofit, ev charger installation, b2c, climate-specific hvac solutions, hvac maintenance, system retrofit, heat pump systems, load-based system design

SumZero Energy Systems's Tech Stack

Decision Makers at SumZero Energy Systems

2 contacts

Ilija Crnobrnja

Co-Founder & CEO

i***@sumzeroenergy.com Sign up to view

David Sampaio

Co-Founder

d***@sumzeroenergy.com Sign up to view

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13 technologies detected · 2 decision makers · Emails available

Sales Outreach Angle

AWS infrastructure signals engineering sophistication. This company likely evaluates cloud cost management, security tooling, observability, and developer productivity solutions.

SumZero Energy Systems's Position in the StackWho Database

• SumZero Energy Systems is 1 of 3,629 consumer services companies tracked in StackWho.
• 3,619 consumer services companies in our database have verified decision-maker emails (100% of the cohort).
• 10,409 companies in Massachusetts are in the StackWho database.
• 1,665 consumer services companies are in the 11-50 employee range (same size as SumZero Energy Systems).

Technology detection from public web signals. Decision-maker contacts compiled from LinkedIn public profiles, company filings, and verified outbound testing. Methodology & sources · Updated July 2026.

Frequently Asked Questions

What technology does SumZero Energy Systems use?

SumZero Energy Systems uses Gmail, Google Apps, MailChimp SPF, Amazon AWS, Yelp, Facebook Login (Connect), and 7 more technologies. This data is sourced from StackWho's technology detection engine.

How do I contact the decision makers at SumZero Energy Systems?

StackWho has verified email addresses for 2 decision makers at SumZero Energy Systems. Pro members can access direct emails for the CEO, CTO, VP of Engineering, and other key contacts. Use StackWho to reach SumZero Energy Systems directly for sales, recruiting, or partnerships.

What industry is SumZero Energy Systems in?

SumZero Energy Systems operates in the consumer services industry, headquartered in Holliston, Massachusetts, United States. StackWho tracks technology stacks and decision maker contacts for companies across all industries.

Can I export SumZero Energy Systems's contact data?

Yes. StackWho Pro members can export decision maker contact data for SumZero Energy Systems and similar companies to CSV. Use the export feature to build targeted prospect lists segmented by technology stack, industry, or location.