Recruiting Agencies: 8 Firms Compared for Employers

A recruiting agency can fill a role you cannot fill yourself, quickly and with access to candidates you would never reach alone. It can also cost a fifth of the new hire\u2019s salary and leave you to handle everything that happens after the offer is accepted. For a small business deciding whether to use one, the real questions are what it actually costs, when it beats hiring on your own, and what the fee does and does not include.

The category is large and a little confusing. Recruiting agency, staffing firm, recruitment company, and headhunter describe overlapping services with different fee models, and the biggest names, Robert Half, Adecco, the Allegis Group brands, sit alongside thousands of small boutiques. Cutting through it means understanding the fee structures, matching the model to how you actually hire, and being clear about where the agency\u2019s job ends.

This guide explains what a recruiting agency does, breaks down every fee model with verified 2026 benchmarks, works through when an agency genuinely beats hiring in-house for a small team and when it does not, and covers the step that catches out most small employers: what happens after the placement, which the agency does not handle for you.

What a recruiting agency actually does

A recruiting agency is an external partner that finds and screens candidates so you do not have to. You hand over a role; the agency uses its network, databases, and recruiters to source people, screens them against your requirements, and presents a shortlist. You interview, decide, and make the offer. The agency\u2019s value is reach and speed: access to candidates, including people not actively job-hunting, and the time saved not doing the sourcing yourself.

What an agency does not do is as important as what it does. It does not make the hiring decision, that stays with you, and it does not do anything after the offer is accepted. Onboarding, paperwork, contracts, training, and setting the person up to succeed are entirely your responsibility. The agency\u2019s job ends the moment the candidate says yes, which is a boundary many first-time buyers of agency services do not fully register until the new hire\u2019s first day arrives and nothing is ready.

Types of recruiting agency

The label matters less than the model. The same firm may offer several of these, so focus on what you are actually buying rather than what the company calls itself.

For a small business, the two that come up most are contingency agencies, useful for a one-off permanent hire because you pay only if you hire, and staffing firms, useful for temporary or seasonal workers because they handle payroll and compliance. Retained search and RPO are built for larger or more specialised hiring and rarely fit a small team\u2019s occasional needs. Match the type to your actual situation, not to the biggest brand name.

The major recruiting agencies

The US market is led by a handful of large firms, useful to know as reference points even if a boutique ends up fitting your role better. The quick-reference table sets out who each is known for; the profiles below add what each does well and where it is a weaker fit. These are not ranked, since they serve genuinely different needs, and the pros and cons below stick to factual matters, specialisation, size, fee transparency, and temporary versus permanent focus, rather than subjective quality judgments.

Robert Half is the best-known specialist staffing firm in the US, founded in 1948 and publicly traded, operating from more than 400 locations. Its regulatory filings describe a focus on finance and accounting, technology, legal, marketing, and administrative roles, with recruiters hired from those fields. It runs both a placement business for permanent hires and a contract-talent business where the worker stays on Robert Half\u2019s payroll and the client pays for hours worked, which gives a small business the option of temporary, contract-to-hire, or direct hire from one firm.

The factual trade-offs: it sits at the higher end on cost, with direct-hire fees of roughly 20% to 30% of first-year salary, and its strength is professional and office roles rather than deeply technical or industrial ones, where specialist firms exist. For finance, accounting, and professional hiring, it is one of the most established options; for a niche engineering or trades role, a focused firm may fit better.

TEKsystems is the largest IT staffing firm in the US and a brand of the Allegis Group, the largest privately held staffing company in the country. It covers nearly every corner of enterprise technology, from application development and cloud engineering to cybersecurity, data analytics, and network infrastructure, and combines contract staff, direct hires, and project-based consulting under one roof. For a business hiring technology talent, especially across several roles or locations, its depth and enterprise-grade processes for compliance and onboarding are a real strength.

The factual trade-offs: pricing is quote-based rather than published, and its model is built for scale, which means a single non-technical role or a one-off small engagement is outside its core focus. TEKsystems is a technology specialist; for finance, industrial, or professional roles, other firms fit more naturally, and a very small single hire may get less bespoke attention than a boutique would give.

Aerotek is the other major Allegis Group brand, focused for more than 35 years on light industrial, skilled trades, manufacturing, and logistics staffing. Where TEKsystems handles technology, Aerotek handles the physical and skilled-labor side: warehouse and production workers, tradespeople, and technical operations roles. For a business staffing industrial or trades positions, particularly in volume or across sites, its depth in that domain and its scale are a genuine advantage.

The factual trade-offs mirror its sibling: pricing is quote-based, and it is built for industrial and trades staffing at volume rather than professional, technical, or executive roles, which sit outside its focus. For a small business filling a single office or specialist professional role, Aerotek is the wrong specialist; for industrial and skilled-trades hiring, it is one of the deepest options available.

Adecco is one of the largest staffing firms in the world by revenue, with a particularly deep industrial and manufacturing practice and operations across dozens of countries. It is a default choice for multi-region, high-volume hiring: staffing production lines, warehouses, and clerical roles at scale, often with on-site workforce programs for large facilities. For a business with large temporary or seasonal industrial needs across several locations, that reach and volume capability are its clear strength.

The factual trade-offs for a small business: Adecco\u2019s general staffing division skews toward temporary and light-industrial placements, its pricing is quote-based, and candidate experience can vary by local branch given the breadth of its network. A small team filling one specialist permanent professional role is outside its core use case; its fit is volume, temporary, and industrial staffing rather than a single niche hire.

Randstad is the largest staffing provider in the world by billings, covering an unusually broad range of sectors, from IT, healthcare, and life sciences to manufacturing, logistics, and finance, through both operational and professional divisions. It supports temporary, permanent, and temp-to-hire placements, and offers on-site management solutions where a dedicated Randstad manager handles attendance and performance at a client facility. For an employer with wide-ranging or high-volume hiring across sectors, that breadth and scale are its strength.

The factual trade-offs for a small business: Randstad is built around enterprise-level and high-volume programs, its pricing is quote-based, and its enterprise-focused processes can feel less agile for a company with a single urgent or highly niche requisition. Its sweet spot is scale and breadth across sectors; a small team filling one specialist role may be better served by a focused firm.

ManpowerGroup is a global workforce-solutions provider that operates through three distinct brands, letting a client route different hiring needs to the right practice without switching vendors: Manpower for general and contingent staffing, Experis for IT and professional talent, and Talent Solutions for outsourced recruiting, managed service programs, and workforce management. It places hundreds of thousands of associates a day, and its strength is managing large, complex, multi-market contingent programs end to end.

The factual trade-offs for a small business: ManpowerGroup is built for enterprise-grade, high-volume workforce programs, its pricing is quote-based, and its scale means a single small permanent hire is not its core focus. The three-brand structure is powerful at volume but heavier than a small team needs for one role. Its fit is ongoing contingent staffing and workforce management rather than an occasional niche placement.

Insight Global is one of the largest IT staffing firms in the US, having grown from a two-person startup into a major player focused on contract and professional roles. It sits as a middle option between the global giants and a small boutique: large enough for reach and repeatable processes, but centred on recruiter-led contract and contract-to-hire placement rather than sprawling enterprise programs. For a business hiring IT or professional contract talent, its focus and full-cycle recruiter model are a genuine strength.

The factual trade-offs: Insight Global is strongest in IT and professional contract roles rather than every field, its pricing is quote-based, and it leans toward contract and contract-to-hire rather than pure permanent search. For an industrial, finance-specialist, or executive permanent role, a firm focused on that area fits more naturally; for IT and professional contract staffing, Insight Global is a focused, capable choice.

Boutique agencies are the thousands of small, specialised firms that each focus on one industry or role type: a single vertical of engineering, a specific healthcare specialty, one region\u2019s sales roles. For a small business filling an unusual or highly specialised position, a boutique with the exact right network often outperforms a global generalist on both candidate quality and attention, precisely because the candidates are already in its pipeline and your role gets real focus rather than sitting in a large firm\u2019s queue.

The factual trade-offs: a boutique, by definition, covers only its niche, so you may need different boutiques for different roles, and none offers the one-stop breadth or multi-location scale of a large firm. Pricing is quote-based and varies. The rule of thumb: a boutique for a hard, narrow role where fit and attention matter most; a larger firm for breadth, volume, or multi-site hiring.

The large firms bring brand, scale, and deep candidate pools, which suit volume, multi-location, or specialist professional hiring. For a small business filling one unusual role, a boutique agency focused on that exact niche often delivers better attention and candidates than a global generalist. Size is not quality; fit to your role is. And across every one of these firms, the fee model, not the name, determines what you actually pay, which is where the next section comes in.

What recruiting agencies cost

Agency pricing follows a few standard models, and knowing them turns an opaque quote into something you can evaluate and negotiate. The table below sets out the main ones with verified 2026 benchmarks.

The headline to internalise: a permanent placement typically costs 15% to 30% of the hire\u2019s first-year salary. On an $80,000 role at 20%, that is a $16,000 fee for one hire. That can be entirely worth it for a role you cannot fill yourself or a search that would take you months, and steep for a role you could have filled with a job post and a week of screening. The fee is not good or bad in itself; it is worth it or not relative to what filling the role yourself would cost in time and outcome.

When a recruiting agency makes sense

An agency earns its fee in specific situations and wastes it in others. The honest test is whether the role is one you can realistically fill yourself, and how often you hire.

Recruiting agency vs hiring in-house

The core decision for a growing small business is whether to keep paying per-hire agency fees or build internal recruiting capacity. It comes down to how often you hire, because agency fees are per-hire while internal recruiting is a largely fixed cost.

The economics are straightforward once laid out. Industry analyses put the internal cost-per-hire near $4,700, against agency placement fees of $15,000 to $35,000 per role. For a single specialist hire, the agency wins on total cost because you avoid a recruiter\u2019s salary. But as hiring volume rises past roughly four to six roles a year, the per-hire fees start to exceed the cost of an internal recruiter plus software spread across all those hires. A company hiring regularly for common roles is usually better served building internal capacity; one hiring occasionally or for rare roles is usually better served by an agency.

How to choose a recruiting agency

If an agency is the right call, a few checks separate a good engagement from an expensive disappointment.

The step recruiting agencies leave out

Whichever way you fill a role, agency or in-house, the same thing is true the moment the candidate accepts: the finding is done, and the onboarding has not started. The agency\u2019s fee bought you a hire, not a functioning employee. Turning one into the other, paperwork signed, policies acknowledged, records set up, training delivered, first week organised, is a separate job that no placement fee covers, and it is where small teams most often let an expensive hire down.

This matters more than it sounds. A candidate who went through a polished agency process and then arrives to a chaotic, unprepared first day loses the confidence they came in with. The quality of the onboarding, not the size of the placement fee, determines whether the new hire starts strong. And unlike the search, onboarding is entirely within your control and cheap to do well.

So budget for both halves of a hire. The search, whether through an agency or your own effort, gets someone to say yes; the onboarding gets them productive and glad they came. Teams that plan the first but not the second pay a premium to find great people and then risk losing them in a disorganised first month. Our guide to onboarding training and our new-hire paperwork checklist cover how to run that step well, and our comparison of HR software for small business covers the tools that handle it.

Frequently Asked Questions

What is a recruiting agency?

A company that finds and screens job candidates for employers in exchange for a fee. You give the agency a role; it sources candidates from its network, screens them, and presents a shortlist; you interview and decide. It is paid when you hire, or in stages for higher-end searches. Agencies range from global firms like Robert Half, Adecco, and the Allegis Group brands down to small boutiques specialising in one field. The core service is sourcing and screening; the hiring decision and everything after it stay with you.

How much does a recruiting agency cost?

Most charge a percentage of the hire\u2019s first-year salary. Contingency search, the most common, runs 15% to 25% for mid-level roles and 25% to 30% for senior ones, paid only when you hire. Retained executive search runs 25% to 33% with minimums often above $80,000, paid in installments. Flat-fee agencies charge $5,000 to $20,000 per hire, and embedded recruiting bills a monthly retainer. On an $80,000 hire at 20%, that is a $16,000 fee. Most contracts include a 60 to 90 day guarantee, meaning a replacement rather than a refund if the hire leaves early.

Are recruiting agencies worth it for a small business?

It depends on how often you hire and for what. An agency is worth it with no internal recruiter, an urgent role, a senior or hard-to-find position, or a need for temporary staff. It is less economical for regular hiring of straightforward roles, where the per-hire fee of $15,000 to $35,000 adds up against an internal cost-per-hire nearer $4,700. As a rough guide, agencies favour occasional, specialist, or one-off hiring, while regular hiring for common roles usually costs less handled internally.

Is it cheaper to hire in-house or use a recruiting agency?

For occasional or specialist hiring, an agency is usually cheaper because you avoid a recruiter\u2019s fixed cost. For regular hiring, in-house is usually cheaper once you pass roughly four to six hires a year, because agency fees are per-hire while a recruiter is a fixed cost spread across every role. Industry figures show internal cost-per-hire near $4,700 against agency fees of $15,000 to $35,000. The break-even depends on role complexity and salary; executive and rare roles often favour an agency even at higher volume.

What is the difference between a recruiting agency and a staffing firm?

The terms overlap and many firms do both. A recruiting agency traditionally focuses on permanent, direct-hire placements: it finds someone who becomes your employee. A staffing firm traditionally focuses on temporary, contract, and seasonal workers, often keeping them on its own payroll. The distinction has blurred as large firms offer everything under one roof. When comparing providers, the useful question is the model, not the label: a one-time placement fee for a permanent hire, or an ongoing markup for temporary workers.

What does a recruiting agency not do?

It sources, screens, and shortlists candidates; it does not run your hiring decision or anything after it. Interviewing, selecting, and making the offer are yours. Once the candidate accepts, everything that turns a hire into a productive employee, onboarding, contracts and e-signatures, policy acknowledgment, training, and system setup, is your responsibility. This is the step small businesses most often underestimate: the agency\u2019s job ends at the placement, and a good first day depends entirely on the onboarding you run afterward.

How do you choose a recruiting agency?

Match the agency to the role: a finance specialist for a finance hire, an industrial firm for warehouse workers, a boutique for a niche position. Get the fee model in writing, including the guarantee and what \u201Creplacement\u201D means. Check how many roles they run at once, since a contingency recruiter juggling many searches may give yours less attention. Ask for average time-to-fill and references in your industry. And weigh recurring fees against building internal recruiting capacity if you hire often.

Do I still need HR software if I use a recruiting agency?

Yes, because the agency\u2019s work ends where yours begins. An agency delivers a candidate; you still onboard them, collect signed documents, run policy acknowledgment, set up their record, and deliver training. None of that is the agency\u2019s job, and doing it on email and spreadsheets is where small teams lose the good impression the hire arrived with. HR or onboarding software handles that post-placement step so the person the agency found has a smooth first week. The agency finds the hire; your onboarding process determines whether they start well.