A significant difference is the level of their knowledge.
There are numerous factors which make a dedicated developer more vital than a freelancer. For example, dedicated developers have background working with a horde of clients on various projects. Even freelancer developers work with multiple clients on different projects. But, the level of expertise of a dedicated developer is greater than a freelancer, because they possess professional experience working with an agency.
An individual freelancer developer might not have the knowledge to work in all the areas. While choosing a dedicated developer can, as the agency will have many experts with hands-on working experience. After all, you need a right specialist who will have a lot of experience on the type of app you want to develop.
A company has multi-faceted developers operating as a team, and it 's hard to replicate this experience as a freelancer.
When hiring a developer from a company, a client has the option to interview and select the best developer from a resource pool based on business requirements. Based on the engagement model selected, dedicated developers work on exclusively on client project only. On the other hand, most freelancers work on multiple projects simultaneously. A single freelancer will not be able to match up the talents of a multi-faceted team of an agency.
2. Availability of the resource
No matter who is available and who isn't. When you hire a developer from the agency, they will assure that your project will be done as it has been promised. Also though the person who was developing your project fall ill or somehow unable to complete the project, the agency will submit it to the other expert who can get it drawn up on schedule. So, you don’t have to worry regarding the availability of the developer.
Security is one of the major issues when not doing in-house development. It encompasses multiple measures such as protecting ideas, critical data, business secrets, and most importantly their trust. We cannot say that only a dedicated developer will offer clients a secure environment and freelancer won't. We can confirm you that a dedicated developer is more reliable because he will be working within a named development company.
To organize a dedicated development team, you need to invest time and energy, but the result deserves it. Whereas freelancers are the easiest way that works well in some cases, most projects require the complete involvement of a dedicated developer.