Everything you need to run profitable delivery.

No — and we'd actively recommend you don't. AtomicSam is the project-to-invoice layer that sits in front of your accounting platform, not a replacement for it.

You prepare clean, accurate billing in Sam — fixed-fee, retainer, progress, or time-and-materials — then push approved invoices straight into Xero or QuickBooks Online with one click.

Your accountant keeps their general ledger, tax, and reconciliation workflow exactly where it belongs, and your delivery team gets a tool built for how project work actually happens.

AtomicSam covers the same ground as a traditional PSA — jobs, time, costs, billing, approvals, reporting — but it's deliberately built differently.

Legacy PSAs (WorkflowMax, Scoro, Projectworks) tend to be heavy, slow to roll out, and force you into one rigid way of working. Sam is a project-to-invoice operating system: lighter to adopt, faster to use day-to-day, and designed around the commercial truth of agency and service-firm work — fixed-fees that drift, retainers that need protecting, variations that need approving, and margin that needs defending.

Think of it as a modern PSA without the PSA tax.

Yes — and you can mix all three across the same client portfolio. Sam supports fixed-fee jobs (with HeadsUp warnings before you blow the budget), monthly retainers (with VibeTime percentage allocation so the team doesn't have to log every minute), progress billing against milestones or stages, and straight time-and-materials when that's what the client wants.

You can also run multi-currency billing with live ECB FX rates, so a London office invoicing a US client in USD just works.

Each invoice mode has its own controls, approvals, and reporting — so commercial leads can see exactly where margin is being made or lost.

This is the question that kills most PSA rollouts — and the one we obsessed over. Sam's time capture is designed for people who hate timesheets: a single fast-entry screen, recent jobs surfaced first, keyboard-first input, weekly view with copy-forward, and mobile capture for site or client visits.

For retainer work, VibeTime lets people allocate by percentage rather than logging every six-minute block — so a designer on a 40% retainer just sets it once.

We also expose what time logging unlocks for the individual (clearer workload, fairer capacity, no Friday-afternoon panic), not just what it gives management. Adoption is the metric we're judged on, and it shows in the product.

Yes — and the controls are designed to protect margin without becoming bureaucracy. You can require approval on quotes before they go out, on variations before work starts, on costs and disbursements before they hit a job, on timesheets before they're billable, and on draft invoices before they're sent.

Approvers are role-based (account leads, finance, principals) and notifications route through email, Slack, or in-app. Audit trails are kept on everything, so when a client queries a charge six months later you have the full history.

Smaller teams can switch most of it off and run lean; larger firms can layer governance in as they grow — same product, different settings.

Yes — Sam scales from a 3-person studio to a 150-person multi-office firm without changing tools. Small teams typically start with jobs, time, and invoicing turned on and most governance switched off — they're up and running in a week.

As you grow, you layer in approvals, multi-team capacity planning, local public holidays per region, role-based rates, multi-currency, departmental reporting, and Slack/ClickUp integrations.

The data model and pricing scale linearly — you're never forced into an 'enterprise' tier that triples your cost the moment you hit 20 users, so there's no need to re-platform as you grow.