Modern Umbraco, without the pain.
We have upgraded sites from v4, v7, v8, v10, v13, and everything in between. Most of the pain comes from rushed scopes and surprises late in the project. Our process front-loads the surprises and sets fixed prices for the rest.
By the time you go live, you are not just running a newer version - you are running a faster, leaner, better-supported site.