Celebrating 31 Years of Client Service

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Technology that works the way your firm does.

CSSI helps investment firms improve client reporting, infrastructure, daily operations, and the systems behind them without forcing a full platform replacement.

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Trusted for

31 Years

Peace of Mind, Backed by SOC 2 Compliance

Whether it's Portal+, BackOffice, or Cloud Hosting - we're serious about keeping your data secure and our 7 years of SOC 2 certification shows it.

SOC 2 Certified
Portal+

Reporting clients can actually enjoy using.

Give clients and advisors one secure place for report packages, documents, dashboards, and account access while your existing portfolio systems keep doing their job.

Explore Portal+
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Latest Insights

Stay up to date with the latest insights, tips, and industry news from CSSI Solutions.

New Account Processes
Feb 05, 2026By James Kipp

New Account Processes

CSSI Solutions had been providing daily reconciliation, among a list of...

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Modernized Portal+ client report produced from Advent Axys data
Jun 01, 2026By CSSI Solutions

They Used Axys for 25 Years. They Didn't Want to Leave It.

How a long-only equity manager modernized Advent Axys reporting with CSSI Portal+ without a full migration, system replacement, or operational disruption.

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SEI Trust 3000 Reconciliation
Jan 21, 2026By James Kipp

SEI Trust 3000 Reconciliation

For a number of years CSSI Solutions had provided reconciliation services to a SEI Trust 3000 customer who...

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About CSSI Solutions

CSSI Solutions provides integrated financial technology, reporting, and operational support for investment advisors, broker‑dealers, and enterprise financial firms. With over three decades of experience supporting firms at every stage of growth, CSSI helps organizations streamline operations, manage complex data environments, and deliver clear, actionable reporting to advisors and end clients.

At the core of CSSI's platform is Portal+, a secure advisor and client reporting portal that brings portfolio data, performance reporting, and data visualization into a single, configurable experience. Portal+ enables advisors and operations teams to access critical information without logging into multiple portfolio management systems, improving efficiency while maintaining data integrity and security.

In addition to Portal+, CSSI offers BackOffice services, cloud hosting, data services, and technology consulting designed to support regulatory compliance, operational scale, and system integration. CSSI works with both modern and legacy systems, helping firms maximize existing technology investments while preparing for future growth.

From growing advisory practices to large enterprise organizations, CSSI Solutions partners with firms to solve real operational challenges; reducing manual processes, improving data reliability, and supporting informed decision‑making across the organization.