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S44 Energy

Open-source EV charging software platform

Overview

S44 Energy provides open-source software for managing electric vehicle (EV) charging networks, giving operators full control over their infrastructure. Their offerings include TopazEV CSMS, a production-ready charging management system that can be deployed in weeks, CitrineOS, an open-source OS that supports a foundation of OCPP standards, and custom engineering services for large-scale operators. CitrineOS is the Linux Foundation Energy project used across 200+ networks, while TopazEV is built on open standards like OCPP 1.6, 2.0.1, and 2.1, OCPI, and ISO 15118. The company emphasizes no vendor lock-in, no per-session fees, and independence from a single provider, differentiating itself from traditional, closed-source CSMS vendors. Their goal is to empower operators with interoperable, transparent software that enables scalable, owner-controlled EV charging infrastructure.

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About S44 Energy

Simplify's Rating
Why S44 Energy is rated
B-
Rated B on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Automotive & TransportationEnergyEnterprise Software

Company Size

51-200

Company Stage

N/A

Total Funding

N/A

Headquarters

Montvale, NJ

Founded

2012

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Simplify's take

What believers are saying

  • LF Energy hosting and nearly 600 developers strengthen adoption and third-party trust.
  • S44 says CitrineOS 1.6.0 added OCPP 1.6 support and GraphQL integration in 2026.
  • Open-source positioning helps operators meet NEVI timelines and reduce six-to-eight-month build cycles.

What critics are saying

  • S44 depends on EV-charging standards adoption; slower OCPP 2.0.1 uptake delays monetization.
  • TopazEV faces commoditization from in-house teams and larger charging software vendors.
  • If CitrineOS community momentum stalls, S44 loses its primary distribution engine and credibility.

What makes S44 Energy unique

  • S44’s CitrineOS is an LF Energy open-source CSMS with 200+ deployed instances.
  • CitrineOS supports OCPP 1.6 and 2.0.1, preserving legacy chargers and new hardware.
  • TopazEV layers commercial support on CitrineOS, combining open-source flexibility with managed deployment.

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Company News

Citybiz
May 14th, 2025
Olga Haygood Named S44 Energy CEO to Lead OaaS EV Charging

S44, a technology leader specializing in transformative software solutions for the automotive and energy sectors, today announced Olga Haygood as CEO of S44 Energy.

ROI-NJ
Oct 24th, 2023
S44 Launches Critical Software To Accelerate Ev Charge Management

Montvale-based S44 recently announced an open source project — CitrineOS — aimed at accelerating the buildout of nationwide electric vehicle charging infrastructure.S44, a leader in EV charging software, said the project will deliver critical back-end software required to ensure EV charge management compliance with Open Charge Point Protocol 2.0.1 and National Electric Vehicle Infrastructure standards.The company said the software is based on real-world EV charging use cases and the need to improve reliability, enabling widespread interoperability between charging equipment, vehicles and networks.President Joe Biden’s administration aims to have 500,000 public EV chargers and for half of new vehicle sales to be electric by 2030. But unreliable and inconsistent charging experiences have consumers putting their foot on the brakes.Biden’s Bipartisan Infrastructure Law has invested $7.5 billion in EV charging, and the Charging and Fueling Infrastructure discretionary grant program offers an additional $2.5 billion. To qualify for this funding, EV charge management software must be OCPP 2.0.1 compliant by Feb. 28, 2024.“Even with an experienced team, you’re looking at six to eight months to build NEVI-compliant EV charge management software from scratch,” Julian Offermann, co-founder and CEO of S44, said. “With CitrineOS, you can do it in a month. Democratizing access to the software is the only way to be fast enough to hit the state and federal certification deadlines.”Everyone from enthusiasts to the largest global charge point operators, fleet managers and car manufacturers can use CitrineOS to:Provision new charging equipment;Complete charging transactions;Remotely control charging equipment;Monitor charger equipment uptime, power levels and degradation; andManage energy consumption and throughput.“Reliable, standardized and open back-end communication is key for commercial, fleet, public and autonomous electric vehicle charging infrastructure,” Cliff Fietzek, board member of CharIN North America, said

The Bakersfield Californian
Oct 18th, 2023
S44 Launches Open Source Project CitrineOS to Accelerate EV Charge Management

S44 launches open source project CitrineOS to accelerate EV charge management.

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