Legacy Application Modernization
Rebuild outdated apps into modern, secure, scalable platforms without losing data. Real production code, 100% ownership, ready on day one. From $5,000.
- 1Audit existing system
- 2Map workflows and data
- 3Rebuild with modern technologies
- 4Migrate data safely
- 5Launch with minimal disruption
The reasons Legacy projects stall — and how we fix each.
The original developers left and we're scared to touch it.
We reverse-engineer first, document second, and rebuild module by module — never a big-bang rewrite.
Migrating data without losing history feels impossible.
Validated migrations with bit-perfect verification and a parallel-run period so nothing is silently dropped.
Every quote we got was 18 months and seven figures.
We phase the rebuild so value lands in weeks, not years — and you can stop after any phase.
Users hate change — what about adoption?
Parallel-run + power-user interviews + UX rebuilt to match muscle memory means adoption is the easy part.
Three packages. One transparent price.
Fixed scope. Milestone billing. If we miss a milestone, you don't pay for it.
Audit
Know what it'll really take to replace this thing.
Best for: Teams deciding whether to modernize, replace, or live with the legacy system.
A written modernization plan you can take to your board.
- Codebase + DB archaeology
- Workflow + user-journey mapping
- Risk & dependency register
- Rebuild vs. refactor decision
- Phased migration roadmap
- Fixed quote for build phase
- Rebuild
- Data migration
- Training
- • Audit report
- • Architecture diagram
- • Phased roadmap + quote
Rebuild
Modern app, your workflows, your data — preserved.
Best for: Internal tools, ERPs, or old SaaS being replaced module by module.
Full rebuild on a modern stack with data migration and parallel-run period.
- Everything in Audit
- Full UI/UX rebuild
- Modern web appTypeScript + React + Postgres.
- Data migration with validationBit-perfect or transformed.
- Parallel-run periodOld + new live together.
- Role-based access + admin panel
- Reporting + dashboards
- Cloud deployment + CI/CD
- 30 days post-cutover hypercare
- Multi-tenant SaaS-ification
- AI layer
- Mobile apps
- • Modern app live
- • Validated migrated data
- • Cutover plan executed
- • Training + runbook
Platform
Modernize and turn it into a real platform.
Best for: Companies modernizing a critical platform AND adding multi-tenant / API / AI capabilities.
Everything in Rebuild + multi-tenant, public API, AI layer, and platform governance.
- Everything in Rebuild
- Multi-tenant architecture
- Public API + webhooks
- AI layerSearch, classify, generate over your data.
- SSO + RBAC + audit logs
- Multi-environment CI/CD
- Performance + security audit
- Dedicated squad
- 90 days post-launch retainer
- • Modern platform deployed
- • Migrated + validated data
- • API + integration layer
- • Security + perf report
- • 90-day retainer
Not sure which package fits? Get a personalized recommendation in 90 seconds.
From kickoff to live, step by step.
Predictable phases. Weekly demos. You see progress every Friday.
- Week 1–2
Audit & blueprint
We reverse-engineer the legacy system, interview power users, and produce a phased plan that doesn't bet the company.
- Week 2–3
Design & data model
New UX, new data model, migration mapping, and a cutover plan reviewed with your team before any code is written.
- Build
Module-by-module rebuild
We rebuild and migrate one module at a time, running old + new in parallel until users prefer the new system.
- Cutover
Cutover with rollback
Cutover day is rehearsed twice. Rollback path is tested. You go live without losing a transaction.
- Post-launch
Stabilize & evolve
30–90 days of hypercare, then optional retainer for new features the legacy system never let you ship.
Built for the people who actually ship.
Teams trapped on Microsoft Access or FoxPro databases
Companies on old PHP/ASP apps no one wants to maintain
ERPs with one critical module that needs to be rebuilt
Hospitality groups on aging PMS or POS systems
Internal tools written by a developer who left years ago
Aging SaaS platforms losing customers to modern competitors
How we compare to the obvious alternatives.
| VYANIS | Big consultancy | Original vendor | DIY rewrite | |
|---|---|---|---|---|
| Time to first phase live | 6–12 weeks | 6–12 months | Won't happen | Open-ended |
| Risk of data loss | Validated, zero | Variable | Variable | High |
| Phased delivery | Yes | Sometimes | No | Often big-bang |
| Quote certainty | Fixed per phase | Change orders | Locked-in pricing | Open-ended |
| Modern stack (TS/React/Postgres) | Always | Often legacy | Their stack | Depends |
| Post-cutover support | 30–90 days included | Paid retainer | Paid retainer | DIY |
Proven tools, hireable everywhere.
We pick tools so you're never stuck because we got fancy.
Real problems we solve with Legacy.
Legacy questions, honestly answered.
Still unsure? Book a 30-minute strategy call — no obligation, no sales fluff.
Ready to ship Legacy?
Send us your idea today. Get a fixed-scope proposal in 48 hours. Start within 1 week.