The rental analysis is the pitch, and most firms treat it as a formality
The rent estimate is the one document an owner receives before deciding, and it is usually a number in an email.
Almost every management company offers a free rental analysis. For the owner it is the only concrete thing they get, and it is the entire basis on which they judge whether you know the market.
Sent as a figure with no reasoning, it invites the obvious response: another firm quoted higher, so they win. A number alone cannot be defended and cannot be distinguished.
What makes it persuasive is the working. Which comparable properties, what condition they were in, how long they took to lease, what specific features of this property move the number up or down, and what a realistic range looks like against time on market.
It also lets you be honest about an overpriced expectation, which is a conversion advantage rather than a cost. An owner told plainly why a high number will produce two months of vacancy frequently trusts that more than the firm that agreed with them.
Treat it as the proposal rather than as a preliminary step, because that is what the owner is treating it as.