Pricing philosophy
Unlimited free guests with view and comment access is a real advantage, your clients can live in Asana without adding to your bill. But Asana's per-seat pricing applies to your team, and Premium or Advanced pricing, roughly $11 to $25 per user per month, adds up as your team grows, even if your client list doesn't.
Where it breaks for agencies
Asana's "Approval" task type lets a task move through a yes or no gate, which is closer to a real approval than most tools get. The problem is what happens after, an approved task is just a task with a different status. Nothing routes it toward billing, nothing tells finance it's time to invoice, that translation still happens in someone's head, or in a spreadsheet.
What we otherwise really like about Asana
Asana's project views, timelines, and workload management are some of the best in the category, and the unlimited free guest policy is genuinely agency-friendly, more so than most tools on this list. Asana AI Studio is also a serious AI offering, not an afterthought. If your team's internal planning already runs on Asana, keep it, and use Scopeyard for the client-facing approval and invoicing layer Asana doesn't have.