Celebrating 31 Years of Client Service

Call

Technology that works the way your firm does.

CSSI helps investment firms fix reporting and operational problems while keeping the portfolio systems they already trust.

CSSI Solutions Logo

Trusted for

31 Years

SOC 2 controls across CSSI services

CSSI has maintained SOC 2 certification for 7 years across Portal+, BackOffice, and Cloud Hosting.

SOC 2 Certified
Portal+

Reporting clients can use without calling your team.

Give clients and advisors one secure place to retrieve reports and documents. Dashboards and account views stay available between reporting periods while your portfolio system keeps doing its job.

Explore Portal+
CSSI Portal+ displayed on a desktop monitor

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...

Read More
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 cut quarterly reporting from days to minutes with CSSI Portal+ while keeping Advent Axys.

Read More
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...

Read More

About CSSI Solutions

CSSI has worked inside investment operations since 1995. The team supports the systems that produce client reports and the daily work required to keep those reports accurate.

Portal+ gives clients and advisors a secure place to retrieve reports, review portfolio information, and find older documents. It works with established portfolio accounting systems, so firms can improve delivery without rebuilding the accounting process.

CSSI also provides recurring BackOffice support, managed cloud hosting, data conversion work, and hands-on system consulting. Engagements range from a single report problem to long-term operational support.