Older ERPNext versions stop getting fixes, and upgrades go wrong when customizations are not accounted for. I handle the whole move from v13 or v14 to v15.

How it works - I audit your existing customizations, apps and integrations, rehearse the upgrade on a staging copy, verify data integrity module by module, then run a rehearsed cutover with a tested rollback plan and a full backup taken first.

You get a working v15 instance, a written record of what changed, and support through the first weeks after go-live.