Ready for life after legacy?
Zero Legacy is what happens when legacy systems stop setting the pace for the business. It’s a future state where modernization reduces risk instead of creating it—and where teams can move forward with confidence.
Slalom helps organizations progress toward Zero Legacy through disciplined modernization of applications, data, and core platforms—prioritizing what matters most while keeping critical systems running.
This is what progress looks like:
Modernization looks very different than it did even a few years ago. AI and agent-based tools have fundamentally changed how engineering work gets done — from understanding legacy code to accelerating delivery and reducing backlogs. They’re also changing how teams plan work, how decisions get made, and how the software development lifecycle operates day to day.
Slalom applies these tools intentionally across application, data, and mainframe modernization, increasing speed where it’s appropriate while respecting the complexity and criticality of the systems involved. AI accelerates our work. It doesn’t replace human judgment.
Modernization, measured
Results our customers are achieving by modernizing mainframes, applications, and data with clarity and control:
Results may vary depending on project scope and organizational readiness.
What legacy modernization delivers
01.
Faster time to value
Modernization enables meaningful improvements in weeks and months—not years—so progress shows up early and keeps compounding.
02.
Lower risk exposure
Greater visibility into systems and dependencies makes change predictable, reducing risk instead of shifting it downstream.
03.
Greater business agility
Modernized platforms make change routine, allowing teams to respond quickly without fearing unintended impact.
04.
Practical AI readiness
Reliable data and platforms turn AI from isolated pilots into capabilities that can be used, governed, and scaled.
05.
Teams freed to build
As maintenance and firefighting decline, teams regain capacity to focus on building, improving, and delivering value.
06.
Preserve critical business value
Modernization retains proven business logic and reliability while removing the cost, complexity, and constraints that no longer serve the business.
Modernize what matters.
Our legacy modernization services:
Application modernization services
Many applications still run critical parts of your business—but weren’t designed for continuous change. Slalom modernizes application portfolios with precision, selectively untangling monoliths to improve flexibility and delivery speed without destabilizing what already works.
Data modernization services
Your data is doing the work, but outdated platforms limit how quickly it can be trusted and used. Slalom modernizes data environments with scalable, AI-ready foundations—prioritizing accuracy, governance, and cost control while enabling near real-time insight.
Mainframe modernization services
Your mainframe earned its place, but evolving beyond it doesn’t mean losing what works. Slalom helps transition critical workloads with AI-assisted tools and a phased approach that reduces cost and talent risk while maintaining the stability the business depends on.
Our modernization partners
Salesforce
Modernizing customer platforms for scale
Slalom helps organizations modernize Salesforce orgs by reducing technical debt to simplify systems into a launchpad for growth, AI adoption, and long-term scalability. 2025 Salesforce Partner Innovation Award: Technology
Amazon Web Services (AWS)
Modernizing core systems with security and control
As a long-standing AWS partner, Slalom specializes in modernizing mainframes and other legacy platforms using phased, cloud-based approaches that preserve business logic, reduce cost, and meet the demands of regulated environments. 2025 Global AWS Partner Award
Microsoft
Modernizing enterprise platforms where work gets done
From Azure to data and application platforms across the Microsoft ecosystem, Slalom helps organizations modernize Microsoft environments with clarity and intent—balancing innovation with security, governance, and operational continuity. 2025 GitHub Services and Channel Partner of the Year
Snowflake
Modernizing data foundations for trust and insight
Slalom helps organizations modernize data platforms with Snowflake by delivering trusted, governed, and scalable data—powering analytics, data sharing, and AI without disrupting existing reporting or compliance. 2025 Snowflake Global Data Cloud Services AI Partner of the Year
Google
Modernizing platforms for speed and scale
Slalom collaborates with Google to modernize applications and data platforms using cloud-native architectures, advanced analytics, and AI—helping organizations improve performance, simplify operations, and scale modernization efforts without disrupting what already works. 2025 Google Cloud Artificial Intelligence Partner of the Year Award for Public Sector
Our partner network
Fueling innovation and sustainable growth
Slalom partners with over 700 of the world’s leading technology providers to support modernization across platforms.
We’re ready when you are.
We help you move from plans to progress—modernizing with clarity, control, and confidence.
Explore our modernization stories & insights
Our experts
Our experts bring deep experience in legacy technology and real respect for what it has enabled over decades. They understand the criticality of the platforms that run hospitals, protect customer data, and keep essential services operating. They also understand how AI is changing the roles, responsibilities, and expectations of modern engineering teams—and how to help organizations evolve without losing accountability or control.
Two stories from the other side of legacy
Modernization isn’t complete when systems are upgraded. It’s final when legacy no longer shapes how the organization operates. These short stories capture that moment: when outdated systems are retired, teams move faster with confidence, and Zero Legacy is what remains.
Frequently asked questions
Modernization with Slalom is selective by design. Proven systems, business logic, and reliability are preserved where they still add value. Modernization focuses on removing constraints, not discarding assets that continue to perform.
Progress toward Zero Legacy shows up in how the organization operates: changes are easier to make, risks are clearer before they become issues, and teams spend more time delivering value than maintaining systems. Leaders often see progress in faster release cycles, reduced dependency risk, improved system visibility, and growing confidence in decisions tied to technology.
Modernization succeeds when it works for people, not just platforms. Slalom modernizes alongside teams—building skills, aligning ways of working, and ensuring changes are understood, trusted, and owned internally so progress continues after our work is done.
Risk is reduced through phased delivery, deep system visibility, and AI-assisted analysis that surfaces dependencies early. Changes are sequenced and validated incrementally, so progress doesn’t come at the expense of stability, security, or compliance.
AI supports our modernization work by accelerating analysis, documentation, testing, and refactoring — reducing effort and uncertainty. It also changes how teams plan work and evolve their delivery processes, which is why judgment and governance remain essential. AI doesn’t replace engineering judgment or governance. It makes modernization safer and more efficient, not riskier.
Meaningful progress may be achievable in weeks or months, not years. Because modernization is incremental, organizations can demonstrate early wins, validate direction, and build momentum without waiting for a large, all-or-nothing milestone.
Zero Legacy isn’t something you buy or implement. It’s the outcome organizations work toward through disciplined modernization of applications, data, and core platforms — at the right pace and in the right order.
Most organizations start where constraints are most acute, such as applications that are hard to change, data platforms that limit trust and insight, or mainframes creating cost or talent risk. This could mean an outdated Salesforce platform that can no longer adapt with new technology, or a data silo preventing effective AI use. Getting to Zero Legacy doesn’t require starting everywhere all at once.
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Legacy shaped your present.
Zero Legacy is your future.
Whether you’re exploring next steps or need to move fast, we can help you prioritize, plan, and modernize with confidence.