Eze Castle Integration
Corporate brand
UnclaimedEze Castle Integration, now commonly branded as ECI, is a global managed services provider serving financial services organizations with cloud, cybersecurity, IT infrastructure, artificial intelligence, and digital transformation solutions.
Last updated November 4, 2026
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Overview
Eze Castle Integration is a private managed services and technology provider focused on the operational and security needs of financial services firms. Founded in Boston in 1995 by Sean McLaughlin and John Cahaly as Eze Castle Consulting, the company began by delivering information-technology services to early-stage hedge funds. Its original specialization in alternative investment firms gave it a focused position in a market whose technology requirements include confidentiality, business continuity, regulatory controls, rapid deployment, and support for geographically distributed investment teams. During its early expansion, the company established a presence in several major U.S. financial centers, including New York City, San Francisco, and Greenwich, Connecticut. In 2000, the original business was divided into two independent companies: Eze Castle Software and Eze Castle Integration. The integration business concentrated on systems integration and managed technology services for financial institutions, while the separation allowed the two organizations to pursue different product and service strategies. By 2004, Eze Castle Integration had grown to approximately 120 employees. From the late 2000s onward, the company expanded beyond conventional systems integration into hosted infrastructure, private cloud, disaster recovery, and managed technology environments. Offerings such as Eze Vault, Eze Disaster Recovery, Eze Managed Suites, and Eze Cloud were developed to address the infrastructure and resilience needs of hedge funds and other alternative investment organizations. The company became associated with early cloud infrastructure adoption in the hedge-fund sector and reported support for hundreds of U.S.-based hedge funds, including firms managing more than $1 billion in assets. ECI also developed an international footprint. It opened a London office in 2007, followed by Chicago in 2008, Singapore in 2010, and Hong Kong in 2011. The geographic expansion enabled it to support investment managers operating across North America, Europe, and Asia. In 2010, an affiliated company, Ledgex Systems LLC, was created to develop portfolio-management software for funds of hedge funds, broadening the technology ecosystem associated with the Eze Castle businesses. The company attracted private-equity investment from H.I.G. Capital in 2018. At that point, it served approximately 650 clients in the United States, the United Kingdom, and Asia. ECI subsequently pursued acquisitions intended to strengthen its technology and managed-services capabilities, acquiring Alphaserve Technologies in 2020 and NorthOut, Inc. later that year. In 2021, Eze Castle Integration adopted the shorter ECI brand. The company continued to expand its geographic coverage, including entry into Canada in December 2021, while retaining its focus on mid-market financial services organizations. Its customer base includes hedge funds, private-equity firms, venture-capital firms, and asset managers. The company states that it serves more than 1,000 clients worldwide, collectively representing more than $3 trillion in assets under management; these figures describe the assets managed by its clients rather than ECI's own assets. ECI's current service scope includes cloud infrastructure management, help-desk operations, Microsoft 365 administration, endpoint management, enterprise monitoring, cybersecurity operations, vulnerability management, security information and event management, extended detection and response, and virtual chief information security officer services. In November 2023, it introduced ELLA, or ECI Large Language Application, a managed generative-artificial-intelligence platform intended to help regulated financial-services firms use large language models with governance, monitoring, data-loss-prevention controls, and retrieval-augmented generation. In 2025, the company introduced a client health dashboard designed to provide real-time visibility into information technology and security conditions. ECI's overall positioning combines outsourced IT operations with specialized cybersecurity, cloud, compliance, and emerging-technology support for investment firms that may not want to build all of these capabilities internally.
History
Eze Castle Integration originated in Boston in 1995, when Sean McLaughlin and John Cahaly founded Eze Castle Consulting. The company initially served early-stage hedge funds in the Boston area, providing outsourced information-technology support to a segment of the financial industry that was becoming more dependent on secure and reliable computing infrastructure. The name was inspired by Èze, a village on the French Riviera. In the late 1990s, the business expanded beyond Boston into New York City, San Francisco, and Greenwich, Connecticut. These locations placed it closer to important concentrations of hedge funds and other investment organizations. In 2000, the original business was divided into Eze Castle Software and Eze Castle Integration. Eze Castle Integration became the systems-integration and managed-services arm focused on financial-services customers. The organization had grown to roughly 120 employees by 2004. During the late 2000s and 2010s, the company developed a wider portfolio of hosted and managed infrastructure offerings. Eze Vault, Eze Disaster Recovery, and Eze Managed Suites addressed data protection, resilience, and outsourced IT operations. Eze Cloud provided a private-cloud environment designed for hedge funds and similar investment firms. The company became an early provider of cloud infrastructure services to the alternative-investment sector and reported supporting approximately 450 U.S.-based hedge funds, including 81 firms with more than $1 billion in assets under management. International expansion became a significant part of the business. ECI opened a London office in 2007 and a Chicago office in 2008, followed by Singapore in 2010 and Hong Kong in 2011. These offices supported clients with multinational operations and helped the company provide services across major financial markets. In 2010, an affiliated entity called Ledgex Systems LLC was created to develop portfolio-management software for funds of hedge funds. The company entered a new ownership phase in 2018 when H.I.G. Capital made a significant investment. At that time, ECI had approximately 650 clients across the United States, the United Kingdom, and Asia. In 2020, it acquired Alphaserve Technologies and later acquired NorthOut, Inc. These transactions supported the expansion of its managed technology, digital, and financial-services capabilities. In 2021, the company rebranded as ECI and continued to broaden its international presence, including an expansion into Canada in December of that year. Its customer base now encompasses hedge funds, private-equity firms, venture-capital firms, and asset managers. ECI describes its global client base as exceeding 1,000 organizations, whose combined assets under management exceed $3 trillion. The modern ECI portfolio combines managed infrastructure and end-user support with cybersecurity, cloud operations, disaster recovery, compliance-oriented technology management, and digital transformation. Its cybersecurity services include SIEM, XDR, vulnerability management, and virtual CISO support. In November 2023, ECI launched ELLA, or ECI Large Language Application, to provide financial-services organizations with a controlled way to use large language models. The platform includes governance-oriented features such as data-loss prevention, retrieval-augmented generation, and monitoring. In 2025, ECI added a client health dashboard intended to give customers current visibility into their IT and security environments. The business therefore occupies a specialized position between a traditional IT outsourcer, a cybersecurity provider, and a sector-focused technology consultancy.
- 2025
Client health dashboard introduced
[1]ECI introduces a dashboard intended to provide real-time IT and security visibility to clients.
- 2023
ELLA launches
[1]ECI introduces a managed large-language-model application for regulated financial-services environments.
- 2021
Rebrand to ECI
[1]Eze Castle Integration adopts ECI as its primary brand identity.
- 2020
Acquisitions of Alphaserve Technologies and NorthOut
[1]ECI completes two acquisitions to expand its managed technology and digital-services capabilities.
- 2018
H.I.G. Capital investment
[1]H.I.G. Capital makes a significant investment in Eze Castle Integration.
- 2011
Hong Kong office opens
[1]The company adds a Hong Kong office to serve clients in Asia.
- 2010
Singapore office and Ledgex affiliate
[1]ECI opens in Singapore, while Ledgex Systems LLC is created as an affiliate developing portfolio-management software.
- 2008
Chicago office opens
[1]ECI adds a Chicago location to its North American network.
- 2007
London office opens
[1]The company begins its later international office expansion with a location in London.
- 2000
The business is divided into two companies
[1]Eze Castle Software and Eze Castle Integration become independent companies, with ECI focusing on systems integration for financial services.
Products and positioning
A specialized, security-conscious managed technology partner for hedge funds, private-equity firms, venture-capital firms, asset managers, and other mid-market financial-services organizations.
Artificial intelligence platform · 2023
ELLA
ELLA, short for ECI Large Language Application, is a managed artificial-intelligence platform designed for financial-services organizations that need to use large language models within controlled and governed environments. Its described capabilities include data-loss-prevention controls, retrieval-augmented generation, and monitoring. The offering is positioned around secure enterprise adoption of generative AI in sectors where confidential information, regulatory obligations, and auditability are important.
Private cloud infrastructure
Eze Cloud
Eze Cloud was developed as a private-cloud platform for hedge funds and other alternative investment firms. It formed part of ECI's move beyond conventional systems integration into hosted infrastructure and managed environments. The service addressed the need for scalable computing, controlled access, operational support, and infrastructure management without requiring every investment firm to build and operate an equivalent platform independently.
Data protection and managed infrastructure
Eze Vault
Eze Vault was among the technology offerings introduced as ECI expanded its managed infrastructure portfolio in the late 2000s. It was associated with secure data and infrastructure services for alternative investment firms, complementing the company's broader approach to hosted technology, operational resilience, and protection of sensitive financial information.
Business continuity and disaster recovery
Eze Disaster Recovery
Eze Disaster Recovery addressed continuity requirements for investment firms that depend on continuous access to systems and data. The offering formed part of ECI's managed-services portfolio and was intended to support recovery planning and resilient operations when technology disruptions affect a financial-services organization.
Managed IT services
Eze Managed Suites
Eze Managed Suites was a bundled managed-technology offering introduced during ECI's expansion into outsourced infrastructure operations. It represented the company's effort to provide financial-services clients with integrated hosting, administration, monitoring, and support rather than isolated consulting engagements.
Cybersecurity
Managed cybersecurity services
ECI's cybersecurity portfolio includes security information and event management, extended detection and response, vulnerability management, and virtual chief information security officer services. These services are designed for financial-services firms that require ongoing security monitoring, threat response, governance, and assistance with security leadership and program management.
Managed information technology
Managed IT operations
ECI provides operational IT support that includes cloud infrastructure management, help-desk services, Microsoft 365 administration, endpoint management, and enterprise monitoring. The offering is tailored to investment organizations that need dependable day-to-day technology operations while maintaining a specialized focus on confidentiality, availability, security, and the working practices of financial professionals.
Brand decisions
2023
Launch ELLAProduct launchBackground
Financial-services firms were seeking access to generative AI while facing heightened confidentiality, governance, and regulatory requirements.
Action taken
ECI launched ELLA, a managed large-language-model application with controls intended for regulated environments.
Aftermath
The launch extended ECI's positioning from managed infrastructure and cybersecurity into governed enterprise AI adoption.
2021
Rebrand as ECIStrategyBackground
The company had expanded beyond its original systems-integration identity into a broader managed-services and cybersecurity provider.
Action taken
Eze Castle Integration adopted ECI as its shorter brand name.
Aftermath
The rebrand supported a broader market identity while the company continued serving investment and other financial-services organizations.
2020
Expand through acquisitionsM&ABackground
ECI sought to broaden its technology and managed-services capabilities for financial-services customers.
Action taken
The company acquired Alphaserve Technologies and subsequently acquired NorthOut, Inc.
Aftermath
The transactions strengthened the company's wider platform of managed technology and digital services.
2018
Accept investment from H.I.G. CapitalM&ABackground
ECI had expanded its client base and international operations and was serving financial-services firms in multiple regions.
Action taken
H.I.G. Capital made a significant investment in Eze Castle Integration.
Aftermath
The investment preceded ECI's 2020 acquisitions and continued expansion of its managed-services platform.
2000
Separate the software and integration businessesStrategyBackground
The original Eze Castle organization had developed both software and technology-services activities.
Action taken
The business was restructured into Eze Castle Software and Eze Castle Integration, allowing the integration company to concentrate on financial-services systems integration and managed technology.
Aftermath
Eze Castle Integration developed as a distinct provider focused on infrastructure and services for alternative investment firms.
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