Best Agentic AI Integration Partners (APIs & Legacy)

Unily is a digital experience platform provider that helps enterprises connect, integrate, and modernize their systems using AI-driven solutions. The company was founded in the United Kingdom and has expanded globally, serving organizations that want to unify data, workflows, and collaboration. Its mission is to make work more efficient by bringing together legacy applications, modern cloud tools, and intelligent automation under one platform.

Tray.io is a cloud-based automation and integration platform that enables businesses to connect different applications, APIs, and data sources with the power of AI. Founded in San Francisco, it has become known for simplifying complex system integrations through its low-code and agent-driven environment. The company’s main goal is to help organizations automate workflows, integrate legacy systems, and modernize processes without requiring extensive coding skills.

OpenLegacy is a specialized integration company that helps organizations connect legacy systems to modern digital platforms using APIs and AI-driven automation. Headquartered in Princeton, New Jersey, OpenLegacy was founded with the mission of making legacy modernization faster, simpler, and more cost-effective. Instead of replacing critical mainframe and core systems, OpenLegacy creates secure APIs that allow these systems to communicate with cloud applications, mobile apps, and AI-driven platforms.

Ascendion is a digital engineering and AI-powered transformation company that helps enterprises modernize their technology landscape by connecting legacy systems with modern platforms through intelligent integration. Based in New Jersey, Ascendion focuses on blending advanced AI agents, automation, and software engineering to deliver end-to-end modernization. Its mission is to enable businesses to unlock the full potential of their existing IT investments while accelerating innovation with AI and cloud-native technologies.

TSRI (The Software Revolution, Inc.) is a US-based technology company specializing in automated legacy system modernization and AI-powered code transformation. Established in Kirkland, Washington, TSRI has been a trusted partner for governments, defense organizations, and enterprises looking to move away from outdated IT infrastructure without disrupting their core operations. Its mission is to simplify modernization by using automation and AI-driven tools to convert legacy applications into modern, secure, and scalable platforms.

Flowable is a leading provider of open-source business process automation and integration solutions that enable organizations to modernize legacy workflows with AI-driven orchestration. Founded in Switzerland, Flowable was built with the mission of helping businesses create intelligent, adaptive processes that seamlessly connect legacy systems with modern cloud applications. Its platform is widely recognized for combining Business Process Management (BPM), Case Management, and Decision Automation into a single framework.

Heirloom Computing is a US-based technology company that specializes in automated mainframe and legacy application modernization. The company was founded with the vision of transforming outdated enterprise systems into modern, cloud-ready applications. Its mission is to eliminate the dependency on aging infrastructure and rare programming skills like COBOL by automatically converting legacy applications into scalable, secure, and API-enabled solutions.

Astadia is a global leader in mainframe and legacy system modernization, helping enterprises transition from outdated IT infrastructures to modern, cloud-native environments. Founded in the United States, Astadia has decades of experience supporting large-scale IT transformations for government agencies, banks, insurers, and Fortune 500 companies. Its mission is to reduce the risks, costs, and complexities of legacy modernization by using automation, AI-driven tools, and proven methodologies.

Advanced Modernization, formerly known as Modern Systems and now part of Advanced, is a global leader in legacy application modernization and digital transformation. Headquartered in the United Kingdom, Advanced focuses on helping organizations unlock the potential of their business-critical systems by migrating them to modern platforms. Its mission is to reduce the risks, costs, and inefficiencies associated with outdated IT, while enabling enterprises to innovate faster with cloud and AI-powered technologies.

CloudFrame is a modernization technology company focused on helping enterprises transform COBOL and mainframe applications into modern, cloud-ready platforms. Headquartered in New York, USA, CloudFrame was founded to address the challenges businesses face with costly, outdated IT infrastructures and the shortage of skilled legacy programmers. Its mission is to provide enterprises with an automated, low-risk pathway to reduce mainframe dependency, cut operational costs, and unlock innovation through AI and cloud technologies.

EvolveWare is a US-based technology company that specializes in legacy system modernization through its flagship product, Intellisys. Founded in California, EvolveWare’s mission is to help enterprises modernize their outdated IT infrastructure while retaining the business rules and logic embedded in those systems. The company focuses on delivering modernization projects with less risk, faster timelines, and lower costs through automation, AI-driven analysis, and API-based integrations.

vFunction is a Silicon Valley–based technology company that specializes in automated application modernization, focusing on transforming monolithic legacy systems into cloud-native architectures. Founded in Palo Alto, California, vFunction’s mission is to help enterprises reduce technical debt, accelerate innovation, and unlock the value of their legacy applications. By combining AI-driven automation with architectural analysis, the company provides a platform that simplifies modernization while ensuring stability and scalability.

Flowgear is a South Africa–based integration platform-as-a-service (iPaaS) that specializes in connecting enterprise applications, APIs, and legacy systems through automation and AI-powered workflows. Founded in Johannesburg, Flowgear’s mission is to eliminate the complexity of system integration by providing businesses with a scalable, low-code platform that bridges the gap between old and new technologies. Its platform empowers organizations to integrate quickly, reduce IT costs, and enhance business efficiency.

Prismatic is a US-based embedded integration platform designed specifically for software companies that need to connect their products with customers’ systems, APIs, and legacy applications. Headquartered in Sioux Falls, South Dakota, Prismatic was founded to simplify the way SaaS providers build and manage integrations. Its mission is to provide a developer-friendly yet low-code environment that makes integrations reliable, scalable, and easy to maintain.

Pipedream is a US-based integration and automation platform that enables developers and enterprises to connect APIs, SaaS applications, and legacy systems with minimal effort. Headquartered in San Francisco, California, the company was created to simplify how integrations are built, deployed, and scaled. Its mission is to give developers and IT teams the tools to create powerful workflows that unify modern cloud apps with older, harder-to-connect systems.