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's first-year pay 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's job ends.

This guide explains what a recruiting agency does, profiles the major firms, and breaks down every fee model and what each one actually costs. It then works through when an agency genuinely beats hiring in-house for a small team and when it does not. It ends with the step that trips up 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 value an agency sells is reach and speed: access to candidates, including people not actively job-hunting, and the time saved not doing the sourcing yourself.

That reach is the part worth paying for, because most of the market is not reading your job post. According to Gallup (Q4 2025), 51% of US employees were either actively looking for a new job (11%) or watching for opportunities (40%). The larger group will take a call and never answer a posting.

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 nothing after the offer is accepted. Onboarding, paperwork, contracts, training, and setting the person up to succeed are entirely your responsibility.

The agency's job ends the moment the candidate says yes. Many first-time buyers of agency services do not register that boundary until the new hire's first day arrives and nothing is ready.

Types of recruiting agency

Recruiting agencies come in a handful of types, told apart by what they deliver and how they bill, from contingency and retained search to temp staffing and recruitment process outsourcing (RPO). 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, two types come up most: contingency agencies, which suit a one-off permanent hire because you pay only if you hire, and staffing firms, which suit temporary or seasonal workers because they handle payroll and compliance.

Retained search and RPO are built for larger or more specialized hiring and rarely fit a small team's occasional needs. Match the type to your actual situation, not to the biggest brand name.

Headhunters, direct hire, and what the labels mean

A head hunter is a recruiter who approaches people who are not looking for a job, usually for a senior or scarce role, and who is paid by the employer rather than the candidate. Headhunter companies work the same way agencies do. The word describes the outbound method, not a separate legal category or a different fee structure.

Direct hire means the agency finds someone who joins your payroll as your employee, for a one-time placement fee and no ongoing markup. It is the opposite of temp staffing, where the worker stays on the agency’s payroll while working for you. Hiring a headhunter for a direct hire is the arrangement most small businesses end up with.

Talent acquisition services, sourcing, and managed staffing programs

Talent acquisition services sit one level above a single placement: a talent acquisition agency or consultant works on how you hire, not only on who you hire. A typical talent acquisition consulting engagement audits your process, rebuilds your scorecards and job specs, then hands the running of it back to your team. It is advisory work billed by project or retainer.

Candidate sourcing companies sell a narrower slice: names and screened profiles, with interviewing left to you. Sourcing services cost less than a full placement fee and suit a team that interviews well but cannot find people. If your bottleneck sits later in the funnel, this is the wrong thing to buy.

A managed service program, or MSP staffing, is different again. The provider manages your entire contingent workforce and the agencies supplying it, consolidating rates, timesheets, and compliance under one contract. MSP staffing companies are built for employers running dozens of contractors at once, which is rare outside mid-size and enterprise companies.

Recruiting agencies by specialization

Most agencies specialize, and matching the specialty to the role matters more than the size of the firm. A sales recruiting firm, a technical boutique, and a healthcare staffing agency each keep a different pipeline of people, and the firm that already has your candidates will beat the one that has to go and find them.

Shortlisting inside a specialty is a smaller job than it looks. Ask three firms in the vertical for recent placements at your salary band and company size, the name of the recruiter who would actually run the search, and the fee in writing. The best tech headhunters for a small company are rarely the ones ranked for enterprise work.

Executive search for C-level, board, and functional leaders

Retained executive search is the model used for C-level, board, and functional leadership hires. The firm works the search exclusively and is paid whether or not it finds the winning candidate. A 2016 SHRM article puts the standard fee at about 33% of the role's first-year salary, bonus, and signing bonus. It is the standard route for a CFO, a chief human resources officer, or a board seat.

Sector variants matter more here than anywhere else. Healthcare, life sciences, private equity, fintech, and international searches run on relationships a generalist does not have, and a retained recruiter is being paid for that network rather than for volume. For a small business, this model earns its cost only when the role is genuinely scarce.

Remote, international, and AI-driven agencies

A remote recruitment agency recruits from a national or global pool rather than a commuting radius, which widens the shortlist and moves the hard part to compliance. An international recruitment agency can find the person, but you still need a lawful way to employ or contract them where they live, and that part is never included in the fee.

Virtual assistant recruiters work the same way and usually place contractors rather than employees, which leaves worker classification with you. Get the engagement in writing: who pays the worker, who supervises them, and what happens to the fee if the arrangement has to change.

AI staffing means two different things, and it is worth asking a firm which one it sells. An AI recruitment agency uses matching and screening models to shortlist faster; an AI staffing agency in the other sense places AI and machine learning engineers. If a firm screens with models, ask what a human reviews before a shortlist reaches you.

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 of the eight firms is known for, followed by the boutique agencies that make up the rest of the market; the profiles below add what each does well and where it is a weaker fit.

The firms are not ranked, since they serve genuinely different needs. Their pros and cons stick to factual matters (specialization, size, fee transparency, and temporary versus permanent focus) rather than subjective quality judgments.

Robert Half is a specialized staffing firm, publicly traded and filing with the SEC as Robert Half Inc. Its annual report dates the business to 1948, when it began by placing accounting and finance professionals. Its own site puts it at more than 300 locations and organizes the business around five practice areas: finance and accounting, technology, marketing and creative, legal, and administrative and customer support.

The firm sells two things a small employer can buy separately. One is placement for permanent hires, paid as a fee. The other is contract talent, where the worker stays on Robert Half's payroll and the client pays for hours worked, which is how a temporary or contract-to-hire arrangement runs.

The factual trade-offs: Robert Half does not publish a rate card, so cost arrives as a quote, 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 has a track record going back to 1948; for a niche engineering or trades role, a focused firm may fit better.

TEKsystems is the technology arm of Allegis Group, and it no longer presents itself as a staffing firm. It describes itself as a multibillion-dollar technology services provider and systems integrator. The numbers it publishes are more than $7 billion in annual revenue, over 100 locations worldwide, 6,000 customers, and 80 percent of the Fortune 500.

The practical effect for a buyer is that talent and delivery come from the same firm. It covers application development, cloud engineering, cybersecurity, data analytics, and AI, and it will sell you contract staff, a direct hire, or a delivered project. For a business hiring technology talent across several roles or locations, that depth is a real strength.

The limits are practical ones. Pricing is quote-based rather than published, and the model is built for scale, so a single non-technical role or a one-off small engagement falls 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, and it puts its own track record at more than 40 years. The industries it names are construction, manufacturing, logistics, transportation, and facilities and maintenance.

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 the staffing brand inside the Adecco Group, which calls itself the world's leading talent, technology, and advisory company. The group operates in more than 60 markets through three businesses: Adecco for staffing, Akkodis for engineering and technology, and LHH for career and talent advisory. The group reports 100,000-plus clients and more than 2 million careers enabled a year.

Adecco itself 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's 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 a single permanent professional role in a specialist field is outside its core use case; its fit is volume, temporary, and industrial staffing rather than a single niche hire.

Randstad describes itself as the world's leading talent company and works in 39 markets. For 2025 it reports helping more than 1.7 million people into work for close to 150,000 clients, across an unusually broad range of sectors: IT, healthcare, and life sciences through to manufacturing, logistics, and finance.

The buying options follow that breadth. Randstad supports temporary, permanent, and temp-to-hire placements, and sells an inhouse service that runs staffing on site at a client facility. For an employer with wide-ranging or high-volume hiring across sectors, that breadth and scale are its strength.

For a small business, the catch is that same scale. 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: Manpower for general and contingent staffing, Experis for IT and professional talent, and Talent Solutions for outsourced recruiting, managed service programs, and workforce management. The structure lets a client route different hiring needs to the right practice without switching vendors.

The scale behind that structure is what a buyer is really paying for. ManpowerGroup works across 75 countries and territories and, by its own account, connects millions of people to work and hundreds of thousands of organizations to talent. Its strength is managing large, complex, multi-market contingent programs end to end.

The trade-offs for a small business follow from that scale. 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 sells staffing, direct placement, executive recruiting, outsourced recruiting, and consulting. It lists 30 industries and functions it works in, among them technology, healthcare, financial services, engineering, and government. Its offices run across the US plus the UK, Canada, India, and Colombia.

The firm sits as a middle option between the global giants and a small boutique: national reach and repeatable processes, run through recruiters who own a search end to end rather than through sprawling enterprise programs. For a business hiring IT or professional talent, that full-cycle recruiter model is a genuine strength.

Three trade-offs stand out. Pricing is quote-based with nothing published. The firm now sells consulting and AI work alongside talent, so a placement conversation can widen into a services pitch. And its recognition is strongest in technology and professional roles. Executive search sits on its service list too, but for a single hard role in one narrow vertical, a boutique with that exact network still fits more naturally.

Kelly files with the SEC as Kelly Services, Inc., and its annual report for 2025 says William Russell Kelly pioneered the staffing industry when he founded the company in 1946. The same report puts 2025 revenue at about $4.25 billion and says that, together with its supplier partners, Kelly placed approximately 375,000 workers during the year.

The business runs as three specialty units. Education supplies education and therapy staff to Pre-K-12 school districts. Science, Engineering and Technology covers science and clinical research, engineering, technology, and telecommunications roles. Enterprise Talent Management handles light industrial, contact center, office and clerical, and accounting and finance staffing, plus outsourced recruiting, managed service programs, and payroll outsourcing.

The trade-offs show in the same report. Permanent placement fees bring in only about 1% of Kelly's revenue, so direct hire is a sideline next to temporary staffing, and its 100 largest customers account for an estimated 55% of revenue. Pricing is quote-based. For temporary, contract, or school staffing, Kelly is a deep option; for a single permanent hire, a firm built on placement fees is the more natural fit.

Boutique agencies are the thousands of small, specialized firms that each focus on one industry or role type: a single vertical of engineering, a specific healthcare specialty, one region's sales roles.

For a small business filling an unusual or highly specialized position, a boutique with the exact right network often outperforms a global generalist on both candidate quality and attention. That is because the candidates are already in its pipeline and your role gets real focus rather than sitting in a large firm's 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 is often the better bet. Size is not quality; fit to your role is. Across every one of these firms, though, the fee model, not the name, determines what you actually pay.

What recruiting agencies cost

Recruiting agencies charge in one of a few standard ways: a percentage of the hire's first-year pay, a flat fee per hire, a monthly retainer, or an hourly markup on temporary workers. Knowing these models turns an opaque quote into something you can evaluate and negotiate. The table below sets out each one, what it typically costs, and when you pay.

The figures to remember: according to SHRM (2016), contingency recruiters usually earn about 20% to 25% of a role's first-year cash compensation, and retained search firms about 33%. A later SHRM article (2022), quoting the chief executive of a recruitment research firm, gives the same 20% to 25% for contingency and 30% to 35% for retained search, billed in thirds: at the start, when a slate of candidates is presented, and at the hire. On an $80,000 role at 20%, that is a $16,000 fee for one hire.

A fee that size is not good or bad in itself. It 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 real comparison is what filling the role yourself would cost in time and outcome, a calculation only you can run.

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. According to SHRM 2025 benchmarking, drawn from 2,371 members, the average cost per hire across all hiring methods was $5,475 for a nonexecutive role and $35,879 for an executive one. A single contingency fee at 20% to 25% of a $60,000 to $120,000 salary runs $12,000 to $30,000.

That gap is what drives the decision. For a single specialist hire, the agency wins on total cost because you avoid a recruiter's 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.

The rule that falls out of it is short. 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, four checks separate a good engagement from an expensive disappointment: whether it specializes in your role, whether the fee terms are in writing, how many searches it runs at once, and what its track record shows.

One benchmark helps you read the answers you get. According to SHRM 2026 recruiting benchmarking, drawn from more than 4,600 organizations, the median time-to-fill fell to 39 calendar days for nonexecutive positions, down from 44 in 2025, and held at 45 calendar days for executive positions, unchanged from 2025. A firm quoting far faster is either sitting on a warm pipeline or telling you what you want to hear.

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's fee bought you a hire, not a functioning employee.

Turning a new hire into a working employee means paperwork signed, policies acknowledged, records set up, training delivered, and the first week organized. That is a separate job 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 disorganized first month.

Frequently Asked Questions

What is a recruiting agency?

A recruiting agency is 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 specializing 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 first-year pay. A 2016 SHRM article puts contingency fees, the most common, at about 20% to 25% of first-year cash compensation, due only when you hire, and retained executive search at about 33%, owed whether the search succeeds or not. Flat-fee agencies charge a set amount per hire, and embedded recruiting bills a monthly retainer. An $80,000 hire at 20% means a $16,000 fee. Contracts often carry a guarantee if the hire leaves early; read whether it means a replacement or a refund.

Are recruiting agencies worth it for a small business?

It depends on how often you hire and for what. An agency is worth it when you have 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 a $12,000 to $30,000 contingency fee repeats every time against an average cost per hire of $5,475 for nonexecutive roles in SHRM 2025 benchmarking. As a rough guide, agencies favor 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's 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. SHRM 2025 benchmarking reported an average cost per hire of $5,475 for nonexecutive roles, less than half of one contingency placement on a professional salary. The break-even depends on role complexity and salary; executive and rare roles often favor 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 is your responsibility: onboarding, contracts and e-signatures, policy acknowledgment, training, and system setup. This is the step small businesses most often underestimate: the agency's 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 "replacement" 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 work an agency does 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 belongs to the agency, 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.