The "agency OS" category solves a different problem than billing clarity
Productive.io and Scoro get recommended constantly in agency software roundups, and the recommendation is usually earned — both platforms genuinely do combine project management, resource scheduling, time tracking, and real margin reporting (revenue minus actual labor cost, not just billed-versus-invoiced) in a way few tools match. If your agency's core question is "which of our accounts and people are actually profitable, and who has capacity for new work next month," these are built specifically to answer that.
That's also exactly why they're not the right starting point for every agency, and worth being honest about rather than pretending every agency needs the same tool.
What these platforms are actually built to solve
Cross-project resource capacity. If you're staffing twenty people across twelve concurrent projects and need to know who's free next Tuesday before you can commit to a new client, that's a genuinely specialized planning problem, and it's the category these tools were built around.
True margin at the account and project level. Real cost-based profitability — labor cost per person, rolled up against revenue, per client — requires connecting payroll-level cost data to time tracking to invoicing, all in one system. It's valuable, and it's also a meaningfully more complex thing to build, maintain, and keep accurate than time tracking or invoicing alone.
Multi-department, multi-service-line operations. Agencies running several distinct service lines with different rate structures, different teams, and different reporting needs benefit from a platform designed around that complexity from the ground up.
Where that complexity becomes a cost, not a benefit
None of this is free, in price or in effort. Per-seat pricing in this category typically runs from the low teens to $30+ per user per month depending on tier — which, for a growing team, means the software bill grows every time you hire, on top of everything else that scales with headcount. Onboarding for the deeper platforms in this category is also commonly measured in weeks, not days, because the depth that makes them powerful is the same depth that takes time to configure correctly.
For an agency whose actual, current problem is simpler — invoices that clients keep questioning, retainers nobody's tracking usage on, time that isn't reliably logged against the right client — that complexity is overhead before it's value. You end up paying for (and configuring) resource planning and margin analytics you're not ready to use yet, while the actual problem (billing clarity) goes unsolved because it was never the hard part these platforms were built to address.
A reasonable way to think about the choice
If capacity planning across a large team, or true per-client margin reporting, is the specific thing you're missing and actively need this quarter — that complexity is the point, and it's worth the learning curve and the per-seat cost.
If your actual problem is closer to "clients question our invoices," "we don't track retainer usage," or "half the team doesn't reliably log time" — a narrower, billing-first tool solves that specific problem faster, at a flat cost that doesn't grow every time you hire, without asking you to configure capacity planning you don't need yet.
Neither answer is universally right. The mistake is picking based on which platform has the longest feature list rather than which platform solves the problem you actually have today — and being honest that a tool built around billing clarity, like ABH, isn't trying to compete with Productive or Scoro on resource planning or margin depth. It's solving a different, narrower problem well, for agencies who aren't at the size or complexity where those deeper platforms earn their cost yet.