A large agency often tends to reassure phone number database australia clients because they have been around for a long time and have a large enough client portfolio to provide you with many references. The downside is often the fact that you are one client among 500 others and your level of importance depends on the amount you pay .
The smaller agency may seem riskier but you will have less difficulty talking directly to the management and making your opinion heard . Again, size is less important than knowing who will take care of your account and how you are viewed by this SEO agency.
To understand the rates of an SEO agency , you need to look at their billing models. There are generally three.

The monthly SEO package is the most common and involves a fixed amount paid each month for a set of services. This allows for a long-term strategy and better adaptation to the needs of the site.
The "one-shot" project: it is based on a specific project with a start date and an end date where a total price is agreed in advance, regardless of the time spent.
Hourly consultation is an option where fees vary depending on the expertise and reputation of the consultant.
The prices of your SEO strategy will also depend on what you are going to delegate.
Packages can include content creation, link building, local SEO, or technical work on your site. On average, for a 20-hour per month SEO package, you can expect to pay between $2,000 and $3,500 per month.