Eleven ways to resource your hiring, compared
There are eleven distinct models for resourcing recruitment, and most businesses are running two or three of them by accident rather than design. This page compares all eleven against the same eight criteria.
How we compared them
Every model below is assessed against the same eight criteria. These are the questions that actually decide which model fits, in roughly the order they matter.
Hiring volume. How many hires a year, across how many role type
Predictability. Is demand steady, seasonal, project-driven or genuinely unpredictable
Duration of need. Weeks, a defined project, or an indefinite operating requirement
Internal TA maturity. Do you have a talent function, a single overstretched recruiter, or nothing (Read: Recruitment Capacity Check | Can Your Hiring Team Keep Up? | Vermelo)
Compliance load. Regulated hiring, IR35 determinations, SMCR, vetting, right to work at scale
Employer brand ownership. Does the candidate experience need to feel like you, or is a third-party badge acceptable
Cost structure. Fee per hire, monthly retainer, management fee, or headcount. These behave very differently at volume
Reporting requirement. Do you need a spreadsheet or a board pack with time-to-hire, source effectiveness and cost per hire you can defend
No model wins on all eight. The exercise is working out which three or four matter most to you this year.
For transparency: between Vermelo and our sister companies Gerrard White and FlarePeople, our group (GWV Talent Solutions Ltd) sells ten of the eleven models listed below. The only one we don't is an in-house team, and you'll find it recommended first anyway.
Read that coverage however you like: as the biggest conflict of interest on the internet or as the reason we genuinely don't mind which model you choose. Our only incentive for this article is to point you at the right model for your hiring needs (even if you don’t end up choosing us as a talent provider).
The comparison at a glance
| Model | Best when | Breaks down when | Typical commercial model | Time to stand up |
|---|---|---|---|---|
| 1In-house TA team | Volume is steady and high enough to keep recruiters busy year-round | Demand spikes, or you need niche skills your team has no network in | Salary and on-costs | Potentially months to hire in-house recruiters (depends on available and notice periods) |
| 2Contingency agency | Occasional, unpredictable hires where you only want to pay on success | Volume rises. Percentage fees scale badly and margin creeps in quietly | 15 to 30 per cent of salary on placement | Days |
| 3Retained search | Senior, confidential or scarce appointments where process rigour matters | Used for roles that did not need it. Expensive by design | Retainer in staged payments | Days to weeks |
| 4Contract and interim staffing | Defined-term capability gaps, project work, cover | Contractor population grows without governance. Compliance risk accumulates | Margin on day rate | Days |
| 5Embedded talentAlso called RaaS | You need recruiter capacity inside your team, on your brand, without adding headcount | You need process design and technology as well as hands | Monthly fee per project or per recruiter | 1 to 4 weeks |
| 6Project RPO | A funding round, site opening, merger or product launch with a defined hiring surge | Treated as a permanent solution by stealth | Fixed project fee or fee per hire at volume | 3 to 6 weeks |
| 7Full-lifecycle RPO | Hiring is an ongoing operating requirement and you want it run properly, end to end | You want to retain day-to-day control of every decision | Management fee, often with a per-hire element | 6 to 12 weeks |
| 8MSPContingent workforce | Contingent spend is significant and visibility, rates and compliance need controlling | Contingent population is small. Overhead outweighs saving | Percentage of contingent spend, or supplier-funded | 8 to 16 weeks |
| 9Total talent solution | Permanent and contingent hiring need planning as one workforce, not two budgets | The organisation is not ready to plan across both | Blended programme fee | 3 to 6 months |
| 10Talent advisory | You know something is wrong with hiring but not what, or you are choosing between the models above | Used as a substitute for delivery capacity | Day rate or fixed-scope fee | Days |
| 11Recruit, train, deploy | Entry-level pipeline in a skills-scarce technical discipline, where nobody is available to hire | You need someone experienced, now | Contract rate over a fixed initial term | Cohort-dependent |
The eleven hiring models in detail
1. In-house talent acquisition
The default answer, and for many businesses it is often the right one. An internal team owns your employer brand, learns your business and builds a candidate network that stays with you.
It works when volume justifies the cost of keeping recruiters occupied. It struggles at the edges; a sudden hiring spike, a discipline nobody internally knows, a market where your brand does not carry or a maternity gap in a two-person team.
We do not sell this. If your volume is steady and your team is competent, adding external providers is often just excess cost. The useful question is not "in-house or outsourced" but "what does in-house need help with", and if help is needed, then that’s a conversation we should have.
2. Contingency recruitment agency
Pay on success, no commitment, fast to engage. Genuinely well suited to occasional hires and to roles where you want several firms competing.
The economics stop working at volume. 15-30% fee percent per hire is fine for four hires a year and painful for forty. Quality varies enormously between firms and, more importantly, between individual consultants at the same firm. Find out more: Agency Fee Calculator | What Recruitment Fees Cost Per Year | Vermelo
Where our group sits. Gerrard White Consulting, our sister brand, does specialist permanent and contract recruitment in insurance, technology and change, and legal. If you have a handful of specialist hires and no need for a programme around them, that is the sensible route rather than an RPO conversation.
3. Retained executive search
For senior appointments, confidential mandates and roles where a wrong hire is expensive to unwind. The retainer buys process: market mapping, structured assessment, referencing, discretion.
It is overused. Plenty of roles sold as executive search are simply hard and would have been filled the same way for a smaller fee. Ask what the retainer is buying that contingency would not deliver, and expect a specific answer.
Where our group sits.Gerrard White Consulting runs retained search up to and including CEO and C-suite appointments within its specialist markets: insurance, technology and change, and legal. If you are appointing a Chief Pricing Officer, Chief Finance Officer, a Claims Director or a CEO for an insurance business, that depth of sector network is exactly what the retainer should buy. For board mandates outside those markets, or where the requirement is a global, cross-industry board network, Korn Ferry, Heidrick & Struggles, Spencer Stuart and Egon Zehnder operate at a reach that specialist firms including ours do not, and that is the honest place to start.
4. Contract and interim staffing
Day-rate capability for a defined period. Fast, flexible, and the model most likely to create problems you notice eighteen months later, when nobody can say how many contractors you have, what they cost or how their IR35 status was determined.
Contract hiring is not the risk. Ungoverned contract hiring is.
Where our group sits.Gerrard White Consulting handles specialist contract and interim recruitment across insurance, technology and change, and legal. And when a contractor population has grown past the point of comfortable governance, that's a Vermelo MSP conversation (see model 8), which is exactly the drift this section warns about.
Honest view: The market here is vast, from global generalists to single-sector boutiques, and quality tracks the individual consultant more than the brand on the door. Choose the person, check their last three placements in your discipline, and keep the supplier list short enough that someone still owns it.
5. Embedded talent, sometimes called RaaS
Recruiters who work inside your team, on your systems, under your employer brand, for a monthly fee rather than as headcount. No placement fees, no long agency relationships, and the candidate experience feels like yours because it is yours.
The honest limitation: embedded gives you capacity, not necessarily capability. If your process, technology and data are the problem, more recruiters running a broken process gets you more of the same, faster. Ask any embedded provider what happens when they diagnose a process problem rather than a capacity problem.
We sell this. Vermelo delivers embedded talent, with most of our track record inside regulated businesses: insurers, insurtechs, fintechs and financial services firms, where every hire carries FCA screening, right-to-work checks and an audit trail.
Credible alternatives. The UK embedded market has grown quickly. Talentful is the established premium name, particularly for global tech companies. Scede has specialised in embedded delivery for European tech and games scale-ups since 2013. McGregor Boyall offers embedded recruitment with deep financial services heritage. We have written a fuller comparison of the embedded market, competitors included, elsewhere on this site. Further reading: Best Embedded Recruitment Providers UK (2026) | Which One Is Right for You? | Vermelo
6. Project RPO
A defined hiring surge with a start and an end date. A funding round, a new site, a merger, a product launch. You get a structured programme, a dedicated hiring team and a delivery plan, and then, crucially, it stops when the contract ends.
That word “crucially” is doing real work here. The failure mode of project RPO is the project that never ends, drifting into a permanent arrangement nobody designed and nobody priced. Put an end date in the contract, mean it, and treat any provider who resists one as telling you something about their business model.
We sell this.Project RPO is one of Vermelo's four RPO models, alongside full, partial and hybrid, and the end date goes in our contracts too.
If your hiring surge spans several countries at once, the big global RPO firms run project-based programmes built for exactly that scale, and they are worth a look before you commit to anyone smaller, including us.
7. Full-lifecycle RPO
The full operating model: sourcing, screening, coordination, offer management, onboarding, reporting, technology, governance. You are not buying candidates, you are buying a hiring function.
This is the model most likely to be oversold. It suits organisations for whom hiring is a continuous operating requirement rather than an occasional event, where reporting matters, and where the internal appetite genuinely exists to hand over process control. If your executive team wants to approve every shortlist, RPO will frustrate everyone involved.
We sell this. Vermelo delivers full-lifecycle RPO in full, partial, project and hybrid forms, with our track record concentrated in insurance and financial services (including Insurtech and fintech). We were named Best Recruitment Process Outsourcing (RPO) Business at the Global Recruiter Awards 2025.
When a larger provider is the better answer. If you are hiring at serious scale across many countries at the same time, the global players often have the infrastructure already in place that we do not right now. AMS is one of the largest and most established global RPO providers, known for complex multi-country programmes and a blue-chip client list. Cielo is a pure-play RPO business focused entirely on recruitment outsourcing, with heavy investment in recruitment technology. Randstad Sourceright, PeopleScout, WilsonHCG and Hudson RPO all operate substantial international RPO practices.
The tradeoff runs both ways. Global scale comes with global process, and mid-market organisations frequently find themselves a small account inside a large programme. If you want the people running your account to know your business and answer the phone, that is an argument for a smaller provider. If you need fourteen countries and a shared service centre, it is not. [Link to RPO provider comparison article]
8. Managed service provider (MSP)
Governance over contingent workforce spend: supplier management, rate control, worker classification, timesheets, invoicing, and the reporting that tells you what your flexible workforce actually costs.
Worth doing when contingent spend is significant enough that the visibility pays for the programme. Not worth doing for a handful of contractors.
We sell this.Vermelo delivers MSP with particular attention to regulated environments, where an inconsistent IR35 determination or an incomplete screening file is a regulatory problem rather than an admin one.
Credible alternatives. Pontoon Solutions and Allegis Global Solutions both run large-scale contingent workforce programmes, as does Randstad Enterprise. At high contingent spend across multiple geographies, those are serious options, and in UK technical and engineering workforces, Morson and Lorien have depth we would not pretend to match.
Further reading: Choosing a Recruitment MSP: Your Questions Answered | Vermelo
9. Total talent solution
Permanent and contingent hiring planned as one workforce rather than two separate budgets with separate suppliers and no shared view. Conceptually obviously right, organisationally difficult, because it usually cuts across HR, procurement and finance.
Most organisations are not ready for it, and the ones that are ready tend to know already. A simple test: if permanent and contingent hiring in your business report to different people who never meet, fix that conversation first. A total talent programme bought before the organisation is joined up just gives the silo another supplier.
We sell this. Vermelo delivers total talent solutions, bringing permanent and contingent hiring under one programme with a single data set and a single point of accountability. It is the natural destination for clients who start with one of our other models and grow into the second.
10. Talent advisory & consultancy
Expertise by the project rather than by the programme. Sometimes that's diagnosis: an independent read on which of the models above fits, a process review, a contingent workforce audit. Just as often it's a specific build: an ATS selected and implemented, an employer value proposition defined, an assessment centre designed, hiring managers trained. You keep the function; the project fixes one part of it.
The scope runs wider than most people expect, from workforce planning and succession mapping through to payrolling, SOW engagement and onboarding design. The common thread is a defined problem, a defined deliverable and an end date, which is what separates advisory from quietly buying an RPO one project at a time.
Small spend, disproportionate return when the alternative is committing to a multi-year programme on a hunch. The obvious conflict: most advisory is sold by firms who also sell delivery. Ask whether the advisory fee is refundable against delivery, and how they would tell you not to buy anything.
We sell this. Six practice areas, from organisation design to diversity strategy, individually or bundled. The full list is on our Talent Advisory page, and yes, the conflict above applies to us too.
11. Recruit, train, deploy
Rather than competing for scarce experienced people, you identify aptitude, train it, then deploy it. Distinct from a graduate scheme because the training happens before deployment, so the person contributes from the start rather than learning on your time.
It only makes sense in disciplines where the shortage is structural and the skills are teachable to a defined standard. It is the wrong answer if you need experience now.
Where our group sits. Our sister brand FlarePeople operates the UK's only recruit-train-deploy model for insurance pricing. It draws talent with the right aptitude and attitude from STEM graduates, ex-military and career returners, trains them through its ten-week Pathfinders Academy covering pricing skills and tools, business acumen, power skills and the insurance sector, then deploys them with clients on an initial 24-month contract with the option to take the person on permanently.
Choosing between recruitment partners
If you take nothing else from this page:
Under ten hires a year, or niche hires: specialist recruitment agency and spend your energy choosing good consultants rather than good firms.
Hiring peaks and troughs, competent internal team, capacity is the gap: embedded recruitment
A defined surge: project RPO, with a contractual end date
Hiring as a permanent operating requirement, reporting matters: full-lifecycle RPO
Significant contingent spend, no visibility: MSP
For permanent and contingent workforce alignment: Total Talent
Serious global scale: one of the large international providers, not us.
A structural skills shortage at entry level in a teachable discipline: recruit, train, deploy (For insurance pricing visit FlarePeople)
You do not know what the problem is:talent advisory & consultancy first. Anyone who diagnoses down the phone and recommends their largest product is guessing.
Where Vermelo fits, and where we do not
We deliver RPO in all four forms, MSP,embedded talent, total talent and talent advisory, with our track record concentrated in regulated sectors like insurance and financial services and the capability to work across sectors. Our sister brands complete the picture: Gerrard White Consulting for specialist agency, contract and executive search recruitment, and FlarePeople for recruit-train-deploy in insurance pricing. Ten models, one group, one honest conversation about which you actually need.
We are a reasonable choice when you want the people running your programme to understand regulated hiring, and when being a meaningful client to your provider matters to you.
We are the wrong choice if you need a single provider running high-volume hiring across many countries simultaneously, or if you want the largest possible brand name on the contract for internal reasons. Those are legitimate requirements. They are not ours.
Bring us the problem and we will tell you which of the eleven fits. Our group sells ten of them, which means we have no favourite to push and nothing to gain from steering you wrong. The eleventh is building your own team, and if that's the honest answer, you'll hear it in the first half hour. Book a discovery call or start with the Solution Finder.
Frequently asked questions
What is the difference between RPO and an embedded recruiter?
An embedded recruiter gives you recruiter capacity inside your team, working on your brand and your systems, for a monthly fee. RPO gives you the whole hiring function: process, technology, governance and reporting as well as people. Embedded is capacity. RPO is an operating model.
Is RPO cheaper than using agencies?
Usually at volume, rarely at low volume. Agency fees are a percentage of salary per hire, so cost rises with every hire. RPO is a management fee, so cost per hire falls as volume rises. The crossover depends on your hire numbers and salary levels; a common industry rule of thumb puts it somewhere around ten to fifteen hires a year, but treat that as a starting point for a calculation, not an answer. Our Agency Fee Calculator will do the sums on your actual numbers in thirty seconds.
What is the difference between RPO and MSP?
RPO covers permanent hiring end to end. MSP governs contingent workforce: suppliers, rates, compliance and spend visibility. Some organisations need one, some need both, and a total talent solution plans them together.
How long does an RPO programme take to set up?
Typically six to twelve weeks for full-lifecycle, faster for project RPO and faster again for embedded. Anyone promising a full RPO live in a fortnight is describing something else.
Do we lose control of our employer brand with RPO?
You should not. Candidates should experience your brand, not your provider's. Ask directly whose email domain candidates receive messages from, whose careers site they apply through, and who they think they are talking to.
Which RPO providers are largest?
AMS, Cielo, Randstad Sourceright, Korn Ferry, PeopleScout, WilsonHCG and Hudson RPO all operate substantial international practices. If scale across many countries is your requirement, those are the firms to shortlist.
Vermelo is a UK talent solutions specialist delivering RPO, MSP, embedded talent (RaaS), total talent and advisory. Named Best Recruitment Process Outsourcing (RPO) Business at the Global Recruiter Awards 2025. Part of the same group as Gerrard White Consulting and FlarePeople.
Author Anthony Butler | 27th August 2026