Skip to content

Get off IdentityServer4 and legacy .NET — safely

Five senior .NET engineers who migrate IdentityServer4 to Duende and .NET Framework to .NET 10. Fixed-scope packages, with AI doing the mechanical work under engineering guardrails that build- and test-gate every change.

Trusted by teams across the US and Europe
94%

Infrastructure cost cut on our own template

11+

Years of .NET experience

23

Built-in SaaS features

92%

Faster compute on our own template

Numbers from our internal template build — read the case study →

Two migrations we know cold

Both start with a free 45-minute call. The optional $80 working session counts toward the package, and the assessment fee is credited against the migration.

Legacy .NET → .NET 10

Still on WebForms or .NET Framework 4.x? .NET 8 and 9 left support on November 10, 2026, too.

A Readiness Assessment inventories your solution, maps every blocker (WCF, WebForms controls, EF6 patterns, third-party packages), and gives you a sequenced, sprint-level migration plan you can run with us or any team.

Package
Readiness Assessment, one 2-week sprint — from $4,800
Legacy .NET modernization

Not a migration? We take general .NET work too — by the hour, by the sprint, or end-to-end.

How a migration starts

Four steps from first contact to a written plan. Not sure we're a fit yet? Start with a free 45-minute call instead.

1

Send us your setup

Versions, project count, key packages, and what hurts. A rough shape is enough — the booking form takes two minutes.

2

We prep before the call

A pre-assessment email digs into your specifics, so session time isn't spent explaining the basics.

3

60-minute working session

Zoom or Teams. Blocker triage, sequencing, live debugging — whatever your migration needs first. $80.

4

Written summary in 24 hours

The main blockers and a recommended path. If a package fits, you get a fixed-scope proposal and the $80 counts toward it.

A big-bang rewrite

  • Months of work before anything ships
  • Business logic re-derived from memory instead of verified
  • One cutover with no rollback plan
  • AI-generated code nobody checked against the old behavior

An incremental migration with us

  • Strangler-fig sequencing: converted sections ship continuously
  • Multi-targeting, so you keep shipping mid-migration
  • Parity tests on behavior-critical paths
  • AI does the mechanical work; every change is build- and test-gated
  • A deployment and rollback plan before cutover

Transparent pricing

No hidden fees. No long-term contracts. Pick the engagement that fits.

1-Hour Consulting

Quick expert advice when you need it

$80 /session
  • Code reviews & architecture guidance
  • Performance optimization
  • DevOps & deployment setup
  • Error diagnostics & debugging
Book an $80 working session

End-to-End

Full project ownership

From $20K
  • Complete design to deployment
  • SaaS template with 23 features
  • 5 connected applications
  • Production infrastructure included
  • Post-launch support
  • 100% source code ownership
Book a free 45-min call

Sprint Development

2-week sprints, no contracts

From $4,800 /sprint
  • 2-week development sprints
  • Weekly progress check-ins
  • Pause or cancel anytime
  • Dedicated .NET developers
  • Full source code ownership
  • Priority communication
Book a free 45-min call

Frequently asked questions

What CTOs and CEOs ask before working with us

How much does it cost to hire a .NET development company?

It depends on the engagement. The two fixed-scope packages are an IdentityServer4 to Duende migration from $9,600 and a .NET Modernization Readiness Assessment from $4,800. A 1-hour consulting session is $80. Sprint-based development starts from $4,800 per 2-week sprint, and end-to-end builds on our SaaS template start from $20,000.

What's the first step: the free call or the $80 session?

The free 45-minute call is a conversation: what you're running, what you need, and whether we're the right team. The $80 session is a working hour on your code with a senior engineer, followed by a written summary with action items within 24 hours. If you go ahead with a package, the $80 counts toward it.

Is the price fixed before work starts?

For the migration packages, yes. Scope, price and acceptance criteria are agreed in writing before work starts, and packages are paid 50% at the start and 50% on acceptance. If you want something added along the way, we quote it first and nothing extra is billed until you approve it. Sprint work is billed at the end of each 2-week sprint, with no upfront deposit.

Do you sign an NDA before we share code?

Yes. We're happy to sign an NDA before any technical discussion, so your code and IP are protected from the first call.

Is there a minimum commitment?

For consulting, it's a single 1-hour session. For sprint development, the minimum is one 2-week sprint. For end-to-end projects, the scope is defined together during discovery. No long-term contracts on any engagement.

Do I own the source code?

Yes. 100%. All custom code and IP belong to you. It's in the contract.

Can you work alongside our existing team?

Yes. Our sprint model is built for this. We plug into your existing workflows, tools, and codebase. Strict NDAs protect your IP, and we handle our own infrastructure and QA. Think of it as adding senior .NET specialists to your team without the hiring overhead.

Let's talk about your project

Tell us what you're running and where it hurts. We'll tell you whether we're the right team for it.

Book a free 45-min call