Platform Migration Companies Specializing in Microservices

No ranking of companies is published here. What can be checked is evidence: Microsoft's support dates for your platform, Martin Fowler's published guidance on microservices, and a past engagement's numbers.

Microsoft ends free support and patches for .NET 8 (LTS) and .NET 9 (STS) on November 10, 2026. .NET 10 (LTS) is supported until November 14, 2028. Platform migrations often start from dates like these. These dates are as published in November 2026.

Martin Fowler's "Monolith First" (3 June 2015) reports that almost all the successful microservice stories started with a monolith that got too big and was broken up, and that systems built as microservices from the start have usually run into trouble.

For .NET, the dates are above. Angular major releases are typically supported for 24 months, with long-term support covering only critical fixes and security patches.

I spent a month fixing bugs and stabilizing the existing app, with no rewrite, and upgraded Angular to the current version. As the app stabilized, the owner let the other engineers go. Engineering cost fell from $48K to $8.7K a month, and ongoing maintenance and new features now cost under $4K a month.

Repairing the second version would have cost more than rebuilding it. I rebuilt the backend and frontend over 14 months and kept about a quarter of the existing code. Maintenance dropped below $8K a month, then to under $2K a month.

Fowler describes his advice as tentative because the evidence is limited, and notes that some colleagues favor starting with microservices, especially teams that have done it before.