SEO - outsource or in-house?

if you will gonna to outsource you should choose professional company to do it for you because most of companies only making the SEO basics and SEO is a continuing process you have to work on it most time you can if you have the budget to hire professional one i recommend that for you because you will get amazing results

Nobody knows the business requirements and objectives of the company except the people who work for this company.
I am a believer of in-house SEO simply because I believe it must be done by the people who understand the objectives and goals and not delegate them to another organization.

I think that there is no one answer to this question.
Each business and market has its own dynamics and needs.
The scale of your operations can have a bearing on the method you use.
And since both in-house SEO and outsourcing SEO have their own pros and cons, each company needs to weigh the pros and cons of both models before taking a decision on the SEO for their website.

Ofcourse, I goes with in-house SEO, as no one knows well about the business, market, needs, strategies,analysis better than the own company.