7 Vetted Directories of System Integration Companies for 2026
Gartner reports that over 50% of system integration projects fail to meet their initial objectives. The primary cause is not technical incompetence but a flawed vendor selection process. CTOs and engineering leaders often rely on generic searches, biased analyst reports, or vendor-supplied marketing, which lack critical context on failure modes, true total cost of ownership, and actual technical depth versus claimed competency.
This flawed discovery process leads to wasted engineering cycles, RFPs sent to mismatched vendors, and project failures that can cost between $1.5M and $10M for mid-market firms. The typical roundup of system integration companies fails to provide the granular detail required for a defensible decision. Before delving into directories, it’s critical to understand what is a system integrator and their role. A competent partner doesn’t just connect APIs; they align technology with business outcomes, a nuance often lost in standard vendor profiles.
This guide provides a curated directory of platforms for finding, vetting, and comparing system integration companies. Each entry analyzes strengths, weaknesses, and common failure modes, helping you build a data-driven shortlist. We focus on uncovering the “when not to use” signals as much as the vendor-promoted success stories, providing a more balanced foundation for your selection process.
1. AWS Marketplace — Professional Services
For organizations operating primarily within the AWS ecosystem, the AWS Marketplace for Professional Services is a procurement-centric directory of vetted system integration companies. It leverages an existing AWS account to streamline contracting and billing, which is valuable for CTOs who prioritize financial governance alongside technical expertise.
Its primary advantage is integration with enterprise procurement workflows. All service engagements are transacted through an AWS account, consolidating invoicing and allowing organizations to use existing AWS spending commitments (like an EDP) to pay for third-party services. This can be a significant financial lever, but it also means the marketplace’s incentives are aligned with increasing your AWS consumption. The “Private Offers” feature enables direct negotiation on custom scopes and pricing, documented within the AWS ecosystem.
Key Features and User Experience
The interface allows filtering by service type (assessment, implementation, managed services), AWS competencies (e.g., DevOps, Migration, SaaS), and specific partners. The selection of system integration companies is extensive but not exhaustive; many top-tier firms do not list their full suite of services here. The experience is about initiating a formal procurement request; most listings are “request for quote” rather than displaying transparent, fixed pricing.
| Feature | How It Supports System Integration |
|---|---|
| Consolidated Billing | Simplifies vendor payment by adding service costs to your monthly AWS bill. |
| Private Offers | Enables direct negotiation of custom SOWs, terms, and pricing with integrators. |
| AWS Partner Vetting | Provides a baseline of assurance as listed partners meet specific AWS competency requirements. |
| Standardized Contracts | Can accelerate legal review by using pre-approved contract templates for service engagements. |
When to Use (and When NOT to Use)
Use when:
- Your organization’s procurement process is a significant internal bottleneck.
- You have an existing Enterprise Discount Program (EDP) or other AWS spending commitment you can leverage.
- The project is well-defined and exclusively focused on the AWS technology stack.
Do NOT use when:
- You are in the early, exploratory phase and need transparent, upfront pricing for budget modeling. The lack of public pricing data is a significant drawback.
- Your integration needs are platform-agnostic or involve significant on-premises components.
- You prefer a relationship-driven sales process over a platform-mediated procurement transaction.
Website: AWS Marketplace Professional Services
2. Microsoft AppSource — Consulting Services
For businesses standardized on the Microsoft ecosystem, AppSource’s Consulting Services portal is a specialized marketplace for identifying certified partners. It provides access to system integration companies with proven expertise in Azure, Dynamics 365, Microsoft 365, and the Power Platform. AppSource focuses on packaged offerings, allowing teams to procure specific, time-boxed engagements like workshops, assessments, and proof-of-concept implementations.
The platform’s key differentiator is its emphasis on pre-scoped, often fixed-fee services. This structure is effective for initiating projects or tackling well-defined integration challenges, like migrating a specific workload to Azure. It allows teams to test a partner’s capabilities on a smaller project (e.g., a $25,000 assessment) before committing to a multi-year, seven-figure contract. This approach de-risks vendor selection but may not be suitable for complex, ambiguous scopes of work.
Key Features and User Experience
The interface enables filtering by service type (e.g., assessment, briefing), product (e.g., Azure, Dynamics 365), and industry. The experience is geared toward discovering solutions for specific business problems. Many listings are for one-to-four-week engagements, providing a low-friction way to start a project. However, pricing transparency is inconsistent; while many workshops have fixed prices, most larger implementation services require direct contact for a quote.
| Feature | How It Supports System Integration |
|---|---|
| Packaged Offerings | Provides clear, scoped engagements (e.g., “2-Week Azure Migration Assessment”) for predictable outcomes. |
| Partner Certification | Ensures listed vendors have met Microsoft’s competency and performance standards for specific technologies. |
| Product-Centric Filters | Allows precise searching for partners with deep expertise in a particular Microsoft product like Power Platform or Azure Synapse. |
| Direct Contact Model | Facilitates direct engagement with potential partners to discuss custom requirements beyond the listed offers. |
When to Use (and When NOT to Use)
Use when:
- Your integration project is centered entirely on Microsoft technologies (Azure, Dynamics 365).
- You need to launch a pilot project or a proof-of-concept with a defined scope and budget.
- You want to evaluate multiple certified system integration companies through short-term, low-risk engagements.
Do NOT use when:
- Your project involves significant multi-cloud or hybrid-cloud components with non-Microsoft platforms.
- You require a detailed, competitive RFP process with multiple custom bids for a large, complex scope of work.
- You need upfront, transparent pricing for large-scale, enterprise-wide implementation projects.
3. Google Cloud Marketplace — Professional Services
For teams committed to the Google Cloud Platform (GCP), the Google Cloud Marketplace for Professional Services is a procurement channel to engage with vetted system integration companies. Similar to its AWS counterpart, this is a procurement-first tool designed to align service engagements with your existing GCP consumption and billing.
The core benefit is the consolidation of procurement and billing. Service contracts are transacted directly through the Google Cloud Marketplace, allowing organizations to draw down on existing GCP spending commitments. This is a significant financial advantage but also creates vendor lock-in risk. The platform’s private offer model facilitates direct negotiations with partners on custom scopes, pricing, and payment schedules, all managed within a Google Cloud account.
Key Features and User Experience
The marketplace interface enables filtering for partners based on expertise, solution types (security, data analytics), and specific services. While the catalog of system integration companies is growing, its depth in certain niche areas is still developing compared to more mature platforms. The experience is centered on initiating a procurement process; most listings require a private offer request rather than providing transparent, off-the-shelf pricing.
| Feature | How It Supports System Integration |
|---|---|
| Unified Billing | Integrates partner service fees directly into your monthly Google Cloud invoice. |
| Private Offers | Allows for direct negotiation of customized SOWs and flexible pricing terms with partners. |
| GCP Partner Advantage | Ensures listed partners meet Google’s specific competency and certification standards. |
| Streamlined Procurement | Accelerates vendor onboarding and contracting by leveraging the existing GCP commercial relationship. |
When to Use (and When NOT to Use)
Use when:
- Your organization has a significant, pre-existing spending commitment with Google Cloud.
- The integration project is exclusively or primarily focused on the GCP stack (e.g., BigQuery, GKE, Looker).
- Your primary goal is to simplify vendor management and procurement for GCP-related initiatives.
Do NOT use when:
- You require a multi-cloud or hybrid solution involving substantial non-GCP components.
- You are in the early budgeting phase and need immediate access to transparent, public pricing.
- The specific, niche system integration companies you need are not yet listed or active on the platform.
Website: Google Cloud Marketplace
4. Salesforce AppExchange — Consulting Partners (Integration)
For companies whose operations are centered on the Salesforce ecosystem, the AppExchange for Consulting Partners is the definitive directory for sourcing integration specialists. This platform is less a transactional marketplace and more a curated vendor discovery tool. It provides access to a deep bench of system integration companies that specialize in connecting Salesforce with other enterprise platforms, from ERPs and marketing automation tools to custom-built applications.
The primary value of the AppExchange is its verifiable data. Partners are categorized by expertise, with a specific filter for “Integration.” Unlike generic directories, the platform provides transparent social proof through customer ratings, review counts, and the number of completed projects. This data offers a quantitative starting point for shortlisting partners based on proven experience rather than marketing claims. However, be skeptical of partners with high ratings but a low number of reviews or completed projects.
Key Features and User Experience
The interface allows users to filter partners by location, company size, and specific Salesforce product expertise (e.g., Sales Cloud, MuleSoft Anypoint Platform). Each partner profile is a comprehensive dossier, listing certified professionals, industry specializations, and detailed customer reviews. The experience is geared toward initiating contact; there is no “buy now” functionality. Users connect directly with partners to begin a formal proposal and discovery process.
| Feature | How It Supports System Integration |
|---|---|
| Verified Reviews & Ratings | Provides transparent social proof from past clients to gauge partner quality and reliability. |
| Integration Service Filter | Narrows the vast partner ecosystem to firms with documented expertise in system integration. |
| Certification Visibility | Confirms partner competency with specific technologies like MuleSoft or Platform Developer credentials. |
| Project Count Metric | Offers a quantitative measure of a partner’s experience level within the Salesforce ecosystem. |
When to Use (and When NOT to Use)
Use when:
- Your integration project’s center of gravity is Salesforce (e.g., CRM, Service Cloud, Marketing Cloud).
- You need to integrate MuleSoft as the primary middleware for your enterprise architecture.
- You value transparent, client-verified performance data (reviews, project counts) in your selection process.
Do NOT use when:
- Your integration needs are platform-agnostic and do not involve Salesforce as a core component.
- You require a transactional platform for immediate, fixed-price service procurement.
- Your due diligence process is limited; the quality delta between highly-rated and lower-rated partners can be significant.
Website: Salesforce AppExchange - Integration Partners
5. CSIA Industrial Automation Exchange — Find an Integrator (Control System Integrators Association)
For leaders in manufacturing, life sciences, and other industrial sectors, the CSIA Industrial Automation Exchange is the definitive directory for sourcing operational technology (OT) system integration companies. This platform moves beyond generic IT services, focusing exclusively on industrial controls, robotics, and process automation. Its primary value is its rigorous CSIA Certification, which acts as a signal for identifying integrators with documented best practices and financial stability.
The exchange is a highly specialized search and vetting tool. The CSIA Certification process involves a third-party audit against comprehensive business and project management standards, re-audited every three years. For a CTO or plant manager, selecting a Certified member can de-risk a project by providing a baseline of assurance that the integrator follows structured methodologies for system design, documentation, testing, and employee training. This focus on operational excellence makes it a critical resource for high-stakes physical automation projects.
Key Features and User Experience
The “Find an Integrator” search tool offers robust filtering essential for the OT space. Users can filter by industries (e.g., automotive, oil & gas), technical specialties (e.g., PLC programming, motion control, SCADA), and specific product expertise (e.g., Rockwell, Siemens). The interface is straightforward, designed to quickly build a shortlist of qualified partners. It also includes a comparison tool to view potential integrators side-by-side.
| Feature | How It Supports System Integration |
|---|---|
| CSIA Certification | Acts as a pre-vetted credential, signaling adherence to industry best practices in management and delivery. |
| Granular Filtering | Allows precise searches by industry, engineering specialty, and specific hardware/software products. |
| Partner Comparison Tool | Enables a side-by-side analysis of shortlisted firms based on their listed capabilities and certifications. |
| Geographic Search | Facilitates finding local or regional partners, which is often critical for on-site industrial projects. |
When to Use (and When NOT to Use)
Use when:
- Your project involves integrating physical hardware, industrial control systems, SCADA, or robotics.
- Reducing project delivery risk through vetted, certified partners is a top priority.
- You need an integrator with documented expertise in a specific vertical like life sciences, food & beverage, or energy.
Do NOT use when:
- Your integration needs are purely enterprise IT-focused (e.g., SaaS-to-SaaS, cloud data warehousing).
- You are seeking a transactional platform for purchasing fixed-price service packages.
- Your primary need is for a global systems integrator; the directory has strong US coverage but is less comprehensive internationally.
Website: CSIA Industrial Automation Exchange
6. Thomasnet — Systems Integrators (US)
For engineering leaders sourcing integration partners for industrial, manufacturing, or hardware-centric systems, Thomasnet is a foundational directory. As a long-standing US industrial sourcing platform, it provides an extensive database of over 1,000 systems integrators, moving the search beyond pure software and into factory automation, robotics, and turnkey electromechanical systems. Its value is in creating a broad, geographically-sorted initial shortlist in a highly specialized sector.
The platform’s strength is its granular classification and deep coverage of the US industrial base. Thomasnet excels at identifying system integration companies that bridge the gap between digital control systems and physical machinery. The search and discovery process is straightforward, functioning like a classic B2B directory but enriched with detailed company profiles that often include certifications (like ISO 9001), equipment catalogs, and corporate videos.
Key Features and User Experience
The user experience is centered around powerful filtering. You can narrow the list of suppliers by location, revenue, ownership type, and specific capabilities, such as “factory automation” or “multi-vendor integrators.” Company profile pages provide direct contact information and a “Request for Quote” (RFQ) mechanism. The interface is utilitarian and information-dense, prioritizing data over a modern SaaS aesthetic. It is a tool for research and sourcing, not on-platform procurement.
| Feature | How It Supports System Integration |
|---|---|
| Granular Industrial Filters | Allows precise searches by capability (e.g., PLC, robotics) and certifications (e.g., UL 508A). |
| Geographic Sorting | Critical for projects requiring on-site work, enabling searches by state or proximity. |
| Rich Company Profiles | Offers detailed descriptions, catalogs, and videos to better qualify potential partners pre-contact. |
| Direct RFQ/Contact | Streamlines the process of sending project specifications to a curated shortlist of vendors. |
When to Use (and When NOT to Use)
Use when:
- Your integration project involves physical machinery, industrial controls, or factory automation.
- You need to source US-based partners in a specific geographic region for on-site implementation and support.
- You are building a broad, initial vendor list and need to vet companies based on certifications and capabilities.
Do NOT use when:
- Your project is purely software-based (e.g., enterprise application integration, SaaS-to-SaaS).
- You require a platform that facilitates the entire procurement and billing lifecycle.
- You need transparent, upfront pricing models instead of a traditional RFQ process.
Website: Thomasnet Systems Integrators
7. Rockwell Automation — System Integrator Partner Locator
For organizations operating in industrial automation and OT (Operational Technology), the Rockwell Automation System Integrator Partner Locator is an essential directory for partners proficient in the Rockwell technology stack (Allen-Bradley PLCs, PlantPAx DCS, FactoryTalk). It is a quality-signal mechanism for engineering leaders managing projects where OT/IT convergence and industrial controls are paramount.
The locator’s core value is its tiered partnership program. Partners are designated as Bronze, Silver, Gold, or Platinum, reflecting their level of investment in the Rockwell ecosystem, technical certifications, and track record. This hierarchy provides a clear, albeit Rockwell-centric, benchmark for a partner’s capabilities. It’s a direct path to finding specialists in a field where generic IT integrators often lack the requisite domain expertise.
Key Features and User Experience
The interface is a map-based locator that allows filtering by location, industry, and specific Rockwell competencies like motion control or process control. The experience is geared toward initiating direct contact; it is a directory for discovery, not a procurement platform. Each partner profile provides contact information and a summary of their specializations, but pricing and scope negotiation happen offline.
| Feature | How It Supports System Integration |
|---|---|
| Tiered Partner Designations | Provides a clear hierarchy (Bronze, Silver, Gold, Platinum) to gauge a partner’s expertise and commitment. |
| Competency & Industry Filters | Allows for precise shortlisting of integrators based on specific skills (e.g., SCADA, DCS) and vertical market experience. |
| Geographic Locator | Simplifies finding local or regional partners for projects requiring on-site presence for installation and commissioning. |
| Direct Contact Pathways | Facilitates direct engagement with potential partners for proposals and technical discussions, bypassing a platform intermediary. |
When to Use (and When NOT to Use)
Use when:
- Your project is heavily dependent on the Rockwell Automation technology stack (e.g., PlantPAx, Allen-Bradley controls).
- You need a partner with verified expertise in industrial controls, SCADA, or OT/IT integration.
- Proximity and on-site support are critical factors, and you need to identify qualified local system integration companies.
Do NOT use when:
- Your technology stack is vendor-agnostic or standardized on a competitor’s platform (e.g., Siemens, Schneider Electric).
- You require a platform that facilitates on-portal quoting, contracting, and billing.
- Your integration needs are purely IT-focused (e.g., cloud-native SaaS applications) with no connection to OT.
Website: Rockwell Automation Partner Locators
Top 7 System Integrator Marketplace Comparison
| Item | Implementation complexity | Resource requirements | Expected outcomes | Ideal use cases | Key advantages |
|---|---|---|---|---|---|
| AWS Marketplace — Professional Services | Medium–High (enterprise SI projects) | AWS account, procurement team, partner engagement | Cloud integrations, managed services, consolidated billing | Cloud-centric system integration for AWS environments | Private offers, consolidated billing, vetted partners |
| Microsoft AppSource — Consulting Services | Low–Medium (workshops) to High (implementations) | Microsoft licenses, certified partners, scoped engagements | Migrations, platform integration, time-boxed pilots | Azure, Dynamics 365, Power Platform modernization or quick starts | Certified partners, packaged workshops, Microsoft alignment |
| Google Cloud Marketplace — Professional Services | Medium–High | GCP account, procurement via private offers, partner coordination | GCP-aligned deployments, managed services, training | Workloads hosted on GCP requiring vendor-aligned procurement | Procurement alignment with GCP, flexible pricing models, Partner Advantage |
| Salesforce AppExchange — Consulting Partners (Integration) | Medium–High | Salesforce tenancy, data access, specialized SI skills | CRM/platform integrations, MuleSoft/data integration, improvements to CRM workflows | Salesforce/MuleSoft integration and CRM-centric projects | Verified reviews, partner certifications, transparent partner profiles |
| CSIA Industrial Automation Exchange — Find an Integrator | High (industrial OT projects) | On-site engineering, OT expertise, certified integrators | Control system implementations, reduced delivery risk via certification | Industrial automation (process, discrete, utilities, oil & gas) | CSIA certification signal, industry-focused filters and comparisons |
| Thomasnet — Systems Integrators (US) | Varies (often High for turnkey) | RFQ process, supplier evaluation, industrial capabilities | Broad shortlists, detailed supplier profiles, sourcing outcomes | Manufacturing, factory automation, multi-vendor industrial integrations | Extensive US coverage, granular filters, rich company detail |
| Rockwell Automation — System Integrator Partner Locator | High (Rockwell-stack projects) | Rockwell tech environment, regional partner contacts, direct inquiry | SCADA/DCS/PlantPAx implementations aligned to Rockwell | Controls and OT projects on Rockwell platforms | Tiered partner designations, vetted partners for Rockwell technologies |
From Directory to Defensible Decision
This directory offers a framework to vet system integration companies based on documented performance, specializations, and cost structures. We’ve dissected primary marketplaces—from AWS and Microsoft’s platforms to specialized exchanges like CSIA’s for industrial automation—to provide the initial data required for a high-stakes decision. The “best” integrator is a contextual choice, dependent on your specific technology stack, project scope, and risk tolerance.
A vendor successful in a Salesforce data migration for a SaaS company is likely unsuitable for a Rockwell Automation PLC integration in a manufacturing facility. The failure modes are different, required certifications are non-transferable, and success metrics are worlds apart. Your selection process must reflect this.
Synthesizing the Data for Your Shortlist
The goal is not to find a universally acclaimed partner but to identify the one with the highest probability of success for your project. To transition from this directory to a defensible shortlist, focus on these critical steps:
- Map Specialization to Your Core Problem: Don’t just look for “cloud migration.” If the challenge is migrating a legacy Oracle DB to AWS Aurora PostgreSQL with a 2-hour downtime window, you need an integrator who lists that exact service as a core competency, supported by public case studies. A generic “AWS Premier Partner” designation is insufficient.
- Cross-Reference Failure Modes with Your Internal Risks: If a common vendor pitfall is “scope creep due to poorly defined SOWs,” and you know your internal project requirements are fluid, this signals a high-risk engagement. Prioritize partners known for rigorous, phased discovery processes that lock down scope before major work begins.
- Validate Cost Models Against Your Budgeting Process: A fixed-bid project from a firm on Thomasnet offers budget predictability, which may be critical. Conversely, a time-and-materials model from an AppSource partner provides flexibility but requires mature internal oversight to prevent cost overruns between $50k-$250k on a typical project. Align the vendor’s business model with your organization’s financial governance.
Beyond the Brochure: The Vetting Imperative
Once you have a shortlist of two to three potential system integration companies, due diligence begins.
Key Insight: The most valuable data is not from the integrator’s sales team but from their former clients. Specifically, ask for references from projects that encountered significant, unexpected technical or organizational challenges. A vendor’s ability to navigate and resolve conflict is a better indicator of performance than a flawless case study.
A successful partnership extends beyond the initial integration. Implement robust vendor management best practices by establishing clear communication protocols, defining service-level agreements (SLAs), and planning for knowledge transfer. The goal is to avoid creating a long-term dependency that hinders your team’s operational autonomy.
Selecting a system integrator is an investment in risk mitigation. You are buying experience and established processes. By using this guide to build a data-driven shortlist and then executing a rigorous vetting process, you can shift the odds in your favor.
This directory provides foundational data, but vetting vendors is time-consuming. Modernization Intel maintains a proprietary database of system integrator performance, including client satisfaction scores and documented project outcomes. Get your unbiased, data-driven vendor shortlist from Modernization Intel to accelerate your decision-making and de-risk your next project.