Legacy Application Support & Modernization
Your business software still matters. Let's make sure it keeps working.
Older software doesn't automatically need to be replaced. But when critical systems become difficult to maintain, integrate, or improve, your business needs an experienced engineering partner. Plev helps organizations understand, stabilize, support, and modernize legacy applications.
Explore Technical Assessments ↓Common challenges
Sound familiar?
- The original software developer is no longer available.
- Your application runs on older .NET technology.
- A vendor integration has stopped working.
- Database performance is affecting operations.
- Upgrading servers or SQL Server feels risky.
- Business-critical code is poorly documented.
- Your IT provider manages infrastructure but cannot maintain the application.
- You're considering an expensive full rewrite but aren't sure it's necessary.
Plev can investigate the system — the code, database, integrations, and how it's deployed — and recommend realistic options, from targeted fixes to a staged modernization plan.
Capabilities
What we can help with
Legacy .NET Application Maintenance
Bug fixes, small enhancements, and safe changes to VB.NET, C#, ASP.NET, and Windows Forms applications your business still relies on.
SQL Server Troubleshooting & Modernization
Diagnose slow queries, locking, and failing jobs, and plan upgrades to supported SQL Server versions without disrupting operations.
Application & Database Migrations
Move applications and databases to newer servers, hosting, or cloud environments with a tested plan and a rollback path.
API & Third-Party Integration Repair
Restore broken vendor connections, replace deprecated APIs, and make data exchange between systems dependable again.
Performance, Reliability & Monitoring
Find what makes the system fragile, add logging and alerting, and reduce the surprises that interrupt daily work.
Incremental Modernization & Architecture Planning
A staged plan to replace or update the riskiest parts first, so you keep what works and invest where it matters.
Modernize selectively
Not every system needs a complete rewrite.
Many aging applications can be improved through focused changes. We weigh cost, risk, and business impact before recommending anything — and a full rewrite is only one option among several.
- Replacing outdated integrations.
- Improving database performance.
- Updating hosting or infrastructure.
- Separating components into maintainable services.
- Adding APIs around existing systems.
- Improving deployments and monitoring.
- Documenting critical dependencies.
- Replacing only components that present significant risk.
Recommended starting point
Legacy Application Technical Assessment
Starting at $3,500
A fixed-scope technical review designed to help you understand an existing application's architecture, dependencies, risks, and most practical improvement opportunities.
Typical included activities
- Initial discovery call.
- Review of agreed application components.
- Evaluation of relevant database dependencies.
- Review of integrations and deployment processes.
- Identification of significant technical and operational risks.
- Prioritized improvement recommendations.
- High-level implementation estimates.
- Written technical assessment and roadmap.
- Findings review meeting.
Assessment scope and deliverables are agreed in writing before work begins.
The starting price assumes a limited assessment — not an unlimited code audit or a full security assessment.
Implementation is optional and quoted separately.
After the assessment
Implementation projects
Targeted Repairs & Integrations
Indicative starting range: $12,000–$25,000
Focused fixes, integration repair or replacement, performance work, and well-defined enhancements.
Phased Application Modernization
Individually scoped — often $30,000+ for substantial projects
Staged updates to frameworks, hosting, architecture, or components, delivered in prioritized phases.
Ongoing Maintenance & Specialist Support
Starting at $1,500/month
A defined, limited support arrangement for continued fixes, monitoring, and engineering guidance.
These amounts are initial pricing targets, not guaranteed all-inclusive prices. Final scope, pricing, availability, and terms are confirmed through a written proposal.
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