Most buyers evaluating staff augmentation providers start the same way: a spreadsheet of hourly rates. It's the easiest thing to compare, and one of the least predictive of whether the engagement actually works.
Here's why. A $45/hour contractor who takes six weeks to ramp and leaves at month four costs more than a $75/hour senior who's productive in the first week and stays for two years. The rate never captures that. Three things do: how rigorously the provider screens for seniority, how fast a placed engineer actually becomes productive, and what their retention looks like once someone's in seat.
This is the framework for comparing software development staffing partners on those three signals, with benchmarks you can actually hold a provider to.
Worth being precise about, since the category gets blurred with adjacent models: staff augmentation means you add an engineer who works inside your team, under your direction and process, while the provider handles employment, payroll, and compliance. You keep architectural control. That's different from outsourcing a defined project to a vendor who manages delivery independently, and different from a fully managed dedicated team that owns a workstream on its own.
If what you actually need is IT talent acquisition for a specific, scoped gap rather than a vendor to own outcomes, staff augmentation is the right model. The comparison below assumes that's the fit you've already settled on.
The question to ask isn't "do you screen candidates." Every provider says yes. The better question is what the screening actually tests, and how deep it goes:
Speed matters twice here: how fast you get a shortlist, and how fast that engineer is actually contributing once they join.
This is the signal buyers check least often and need most. An engineer who's productive but leaves in four months just moves the cost from "screening" to "ramp, twice."
Staff augmentation embeds an engineer inside your team under your direction, while outsourcing hands a defined project to a vendor who manages delivery independently. Augmentation preserves your architectural control; outsourcing trades some of that control for a hands-off delivery model.
A well-run technical staffing solution should return a qualified shortlist within days, and a placed senior engineer should typically make a meaningful contribution within two-three weeks on a codebase they're onboarding into.
There's no single right number, but a simple gut check works: ask what share of their placed engineers leave a client account within a year. Above roughly 30%, you're likely paying to onboard someone twice before the year is out.
Rate matters for budgeting, but comparing providers on rate alone is the most common mistake buyers make in this category. A cheaper engineer who ramps slowly or leaves early usually costs more once ramp time and re-hiring are factored in.
The providers worth comparing are the ones that can answer these questions with real numbers, not reassurance. If a staff augmentation partner can quote their acceptance rate, their time-to-first-contribution, and their attrition rate without hesitating, that's a stronger signal than any rate card.
That's the standard we hold ourselves to at BetterEngineer: real numbers on screening, ramp, and tenure, not just a resume that matches on paper. If you're comparing staff augmentation providers for a senior hire right now, happy to walk through our actual numbers against whatever's on your shortlist.