What CSSi does

CSSi (Corporate Software Solutions, Inc.) is an independent software architecture consultancy founded in 2010 and operated by Gregory Mendez as principal architect out of South Huntington, New York. The firm is structured as a deliberately small, senior-architect-only practice with no junior handoffs, marketed directly to enterprise and mid-market CTOs through a website contact form, email, and phone, with 30-minute introductory calls and no slide decks.

The practice delivers three core services on the Microsoft Azure, .NET, Claude, MCP, and Power BI stack: Platform Modernization (Azure landing zones, strangler-fig migration patterns, DevOps pipelines with policy-as-code); AI Orchestration (production-grade multi-agent systems on Claude and Azure OpenAI, custom MCP servers exposing internal tools to agents, RAG with Azure AI Search, human-in-the-loop governance); and Delivery Intelligence (Power BI semantic models on Microsoft Fabric, DevOps and product KPIs joined to financial outcomes, adoption scoring). Proprietary engineering patterns include a resumable Azure Functions ingestion framework with adaptive backoff, an RLS-aware MCP server for Copilot Studio, and an internal 15-skill multi-agent analysis engine. The model is engagement-based professional services, quote-priced per project across three formats: 8-16 week architecture engagements, 4-8 week AI pilots, and advisory retainers.

CSSi is bootstrapped and founder-owned with no institutional capital, no subsidiaries, and no disclosed revenue. It is a member of the Microsoft and Anthropic partner ecosystems by skill rather than by formal alliance, and distributes thought leadership through a technical blog, an insights section, LinkedIn, and Twitter. Named clients include Marc Jacobs, GroupM, Booz Allen, Chyron, C.A. Tech, Third Eye Development International, and WPP Media, with WPP Media accounting for multiple 2025-2026 engagements.

Name

CSSi

Legal name

Corporate Software Solutions, Inc.

Website

https://css-i.com

Company type

Private

Founded year

2010

Operating status

Operating

Headcount range

1–10 employees

Short description

CSSi is an independent, sole-practitioner software architecture consultancy led by Gregory Mendez, offering Platform Modernization, AI Orchestration, and Delivery Intelligence services to enterprise and mid-market CTOs on Azure and .NET stacks.

Ownership category

akta.pro rank

Product category

Software Architecture Consulting

NAICS

Computer Systems Design and Related Services (5415), Custom Computer Programming Services (541511), Computer Systems Design Services (541512)

SIC

Services-Computer Programming, Data Processing, Etc. (7370), Services-Computer Programming Services (7371), Services-Computer Integrated Systems Design (7373)

akta.pro primary industry

DevOps Consulting & Transformation (BPAEAKAA)

akta.pro secondary industries

Platform Engineering & Internal Developer Platforms (IDP) (BPAEAKAC), DevOps, SRE & Platform Engineering Consulting (BPAHAEAK)

Keywords

• Platform modernization consulting
• AI orchestration services
• Enterprise Azure architecture
• Delivery intelligence dashboards
• Senior architect advisory

Headquarters

HQ city

Huntington Station

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Architecture Consulting: Senior architect consulting engagements for CTOs who need platform modernization, AI orchestration, or delivery intelligence. Three engagement models: 8-16 week architecture engagements, 4-8 week AI pilots, and advisory retainers.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

CSSi is an independent software architecture practice that delivers senior-architect-led consulting across three areas: Platform Modernization (moving legacy .NET estates to Azure with landing zones, strangler-fig migration patterns, and DevOps pipelines with policy-as-code), AI Orchestration (production-grade multi-agent systems on Claude and Azure OpenAI with custom MCP servers and human-in-the-loop governance), and Delivery Intelligence (Power BI semantic models on Microsoft Fabric that join DevOps and product KPIs to financial outcomes). Engagements are scoped as 8-16 week architecture engagements, 4-8 week AI pilots, or advisory retainers, with no handoffs to junior staff.

Product overview

CSSi (Corporate Software Solutions, Inc.) is an independent software architecture practice led by Gregory Mendez, offering three core consulting services: Platform Modernization, AI Orchestration, and Delivery Intelligence. The practice focuses on enterprise and mid-market CTOs who need systems that survive production. Services are delivered as senior architect direct engagements rather than junior handoffs. The three service areas are designed to work together: Platform Modernization provides the Azure/.NET foundation, AI Orchestration adds multi-agent capabilities with Claude and custom MCP servers, and Delivery Intelligence instruments the resulting systems with Power BI reporting that leadership can trust.

Differentiator

Problem solved

Functional benefit

Products and services

• Platform Modernization End-to-end consulting engagement that moves legacy .NET estates to a modern Azure platform without breaking the business. Includes Azure landing zones, modular APIs, reference architectures, strangler-fig migration patterns from monoliths to services, DevOps pipelines with policy-as-code and quality gates, and knowledge transfer to client teams. Structured as an 8-16 week architecture engagement.
• AI Orchestration Consulting engagement that ships production-grade multi-agent systems on Claude and Azure OpenAI with custom MCP servers. Each pilot delivers one orchestrated workflow into production with evaluation harnesses, observability, and governance patterns including human-in-the-loop gates and audit trails. Scoped as a 4-8 week AI pilot.
• Delivery Intelligence Consulting engagement that builds Power BI dashboards and semantic models on Microsoft Fabric (or existing warehouses) for executive reporting. Instruments DevOps and product KPIs joined to financial outcomes, with adoption scoring for new platforms and AI rollouts. Typically a 6-10 week instrumentation engagement.

Quantifiable outcome

• Platform modernization delivered via staged migration patterns that keep business operational throughout
• +1 more outcomes

Named customers7 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration8 records

AI capability5 records

Feature6 records

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Magenic Technologies: Magenic is a U.S.-based consultancy specializing in .NET, Azure, and Microsoft data platform development. It is a direct peer in stack and delivery model, though typically operating with a larger bench than CSSi's principal-only model.
• Improving: Improving is a mid-sized, Microsoft-focused technology services firm specializing in .NET, Azure, and custom software development. It is a direct peer given its nearly identical stack alignment and similar custom-application / platform engineering delivery model.
• JourneyTEAM: JourneyTEAM is a smaller Microsoft-focused consultancy delivering Azure, Power BI, Dynamics, and Microsoft 365 solutions to enterprise and mid-market clients. It is a direct peer in stack and customer segment, with overlap on CSSi's Power BI / Delivery Intelligence offering.
• Applied Information Sciences (AIS): AIS is a Microsoft-focused custom software and cloud consultancy delivering Azure, .NET, and data platform engineering for federal and commercial clients. It is a direct peer in stack, customer profile (including defense adjacency), and modernization delivery model.

Emerging players

• Adastra: Adastra is a data, AI, and cloud transformation consultancy with strong Azure and Microsoft Fabric capabilities. It is an emerging player with partial overlap on CSSi's AI orchestration and delivery intelligence pillars, particularly in European markets.
• Concentric Sky (now part of a larger firm): Concentric Sky was a smaller consultancy specializing in .NET, Azure, and enterprise integration — closely aligned with CSSi's modern Azure and platform integration focus before its acquisition. It represents the type of specialized shop CSSi most directly competes with.
• Kasmo Global Solutions: Kasmo is a Microsoft-specialized consultancy delivering Azure, .NET, Power BI, and AI engineering services. It is an emerging player with strong overlap on CSSi's platform modernization and analytics instrumentation pillars, though typically operating at a larger delivery scale.

Broad incumbents

• Slalom: Slalom is a major consultancy with deep Microsoft, Azure, and AI engineering practices serving enterprise and mid-market clients. It is a broad incumbent that competes on platform modernization and AI implementation engagements with significantly more geographic and team scale.
• Avanade: Avanade is the largest pure-play Microsoft consultancy, jointly owned by Accenture and Microsoft, offering Azure, AI, and Power Platform services at global enterprise scale. It is a broad incumbent that competes for the same CTO-level Azure/AI transformation budgets CSSi targets.
• Insight Enterprises: Insight is a large global IT solutions and services provider with a significant Microsoft Azure and AI services practice. It is a broad incumbent offering overlapping platform modernization capabilities as part of a much wider hardware, software, and services portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xtwitter.com/gregatcssi
• Facebookfacebook.com/corporatesoftwaresolutions
• LinkedInlinkedin.com/company-beta/9186600

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about CSSi