A growing number of mid-market firms are restructuring their approach to staffing, moving away from traditional full-time employment towards on-demand talent pools accessed through Workforce-as-a-Service (WaaS) platforms. This shift, accelerated by post-pandemic cost pressures and the need for operational flexibility, represents a structural change in how companies source, deploy and manage human capital for project-based work.
What Changed
The WaaS model, sometimes called talent-as-a-service or curated freelancer networks, has existed for several years but is now gaining traction among firms with 50 to 500 employees. Unlike traditional staffing agencies that provide temporary workers for defined roles, WaaS platforms offer vetted, pre-assembled teams of specialists who work on specific projects with clear deliverables and timelines. Companies pay for output rather than hours, and the talent pool is managed by the platform provider, which handles compliance, payroll and performance management.
Several factors have converged to accelerate adoption. First, the cost of full-time employment in many developed markets has risen sharply, driven by salary inflation in technology and specialist roles, plus employer tax and benefits obligations. Second, the pandemic normalised remote and hybrid work, making it easier to integrate external teams into existing workflows. Third, mid-market firms face increasing pressure to move faster on digital transformation, product development and market expansion, but lack the budget or certainty to commit to permanent headcount.
Data from industry surveys suggests that between 2021 and 2024, the proportion of mid-market firms using on-demand talent for at least one major project rose from roughly 20% to over 40%. While exact figures vary by region and sector, the trend is consistent across technology, financial services, professional services and manufacturing. Platforms such as Toptal, Upwork Enterprise, Fiverr Business and Andela have expanded their mid-market offerings, and newer entrants like Contra and YunoJuno are targeting the same segment.
Why It Matters
For founders, operators and investors, the WaaS shift has direct implications for cost structure, scalability and competitive positioning. A firm that can access a pre-vetted team of software developers, data analysts or marketing specialists within days, without the overhead of recruitment, onboarding and employment risk, gains a material advantage in speed and cost efficiency. This is particularly relevant for project-based work such as building a new product feature, launching into a new geography or executing a one-time compliance overhaul.
The model also changes the economics of talent acquisition. Instead of spending 20% to 30% of a role's salary on recruitment fees and internal hiring costs, firms pay a platform fee that typically ranges from 10% to 25% of project value, with no ongoing commitment. For a mid-market firm with a £2m annual payroll, shifting 20% of work to WaaS could reduce employment-related costs by £100,000 to £200,000 per year, depending on the mix of roles and geographies.
Investors should note that companies with a higher proportion of project-based work may be more resilient during downturns, because they can scale down talent costs quickly without redundancy payments or morale damage. Conversely, firms that rely heavily on full-time staff for variable workloads face higher fixed costs and slower adjustment.
Commercial Impact
The commercial impact of the WaaS shift is most visible in three areas: cost flexibility, speed to capability and risk transfer.
Cost flexibility. WaaS converts fixed employment costs into variable project costs. This is especially valuable for mid-market firms that experience seasonal demand, cyclical revenue or uncertain growth trajectories. A firm can engage a team for three months to build a new e-commerce platform, then release them without severance or notice period. The platform handles tax, insurance and compliance, reducing administrative burden.
Speed to capability. Traditional hiring for a specialist role can take four to eight weeks from job posting to start date. WaaS platforms can match a project brief to a curated team within days, often with candidates who have been pre-vetted for technical skills and communication ability. For time-sensitive projects, this speed can be the difference between capturing a market opportunity and missing it.
Risk transfer. The platform provider assumes responsibility for talent quality, performance and legal compliance. If a team member underperforms, the platform typically replaces them at no additional cost. This shifts a significant portion of operational risk away from the hiring firm, which is particularly attractive for companies without a dedicated HR or legal function.
However, the commercial impact is not uniformly positive. Firms that over-rely on WaaS risk losing institutional knowledge, weakening team cohesion and creating a two-tier workforce where permanent employees feel less invested in the company's long-term success. There is also the risk of platform dependency: if a platform raises prices, changes its vetting standards or goes out of business, the firm's project pipeline could be disrupted.
Risks / Unknowns
Several risks and unknowns surround the WaaS shift, and prudent operators should approach the model with clear eyes.
Quality consistency. While platforms vet their talent, the quality of work can vary significantly between projects and individuals. A firm that has a bad experience with one team may lose trust in the model entirely. There is no guarantee that a platform's vetting process accurately predicts performance on a specific project.
Cultural integration. On-demand teams work remotely and may have limited exposure to the hiring firm's culture, values and long-term strategy. This can lead to misalignment on priorities, communication styles and quality standards. For projects that require deep domain knowledge or close collaboration with permanent staff, the WaaS model may be less suitable.
Data security and IP protection. Sharing proprietary data, customer information or trade secrets with external teams introduces additional risk. While platforms offer NDAs and data protection clauses, enforcement can be difficult across jurisdictions. Mid-market firms may lack the legal resources to pursue breaches effectively.
Regulatory uncertainty. Employment classification laws in many jurisdictions are evolving. If regulators determine that WaaS workers should be classified as employees rather than independent contractors, the cost and compliance burden could shift back to the hiring firm. The UK's recent changes to IR35 rules and the EU's proposed Platform Work Directive are examples of regulatory developments that could affect the model.
Platform concentration. The WaaS market is still relatively concentrated, with a handful of platforms dominating the mid-market segment. If one of these platforms experiences a data breach, service outage or reputational crisis, many firms could be affected simultaneously. Diversifying across multiple platforms may mitigate this risk but adds complexity.
FY Outlook
Over the next 12 to 24 months, we expect the WaaS model to become a standard component of mid-market workforce strategy, rather than an experimental alternative. Several trends support this view.
First, the platforms themselves are investing in better matching algorithms, more rigorous vetting and integrated project management tools, which should improve quality consistency and reduce friction. Second, the generation of managers who entered the workforce during the gig economy era is now moving into decision-making roles, bringing greater comfort with non-traditional employment models. Third, the ongoing pressure on mid-market margins, driven by inflation, rising interest rates and competitive intensity, will continue to favour variable cost structures.
However, we do not expect WaaS to replace full-time employment entirely. The model works best for discrete, measurable projects with clear deliverables. For ongoing operations, customer relationship management and roles that require deep institutional knowledge, permanent staff remain essential. The most successful mid-market firms will likely adopt a hybrid model, using WaaS for project-based work and retaining full-time employees for core functions.
Regulatory developments bear close watching. If the EU's Platform Work Directive is adopted in its current form, it could reclassify many platform workers as employees, increasing costs for both platforms and hiring firms. The UK government's position on gig economy regulation remains uncertain following the change in administration. Firms should model the financial impact of a potential reclassification and consider contractual safeguards.
Conclusion
The shift towards Workforce-as-a-Service among mid-market firms is a rational response to cost pressures, speed requirements and the need for operational flexibility. It offers clear advantages in cost flexibility, speed to capability and risk transfer, but carries risks around quality consistency, cultural integration, data security and regulatory uncertainty. For founders, operators and investors, the prudent approach is to adopt WaaS selectively for appropriate projects, maintain a strong core of permanent staff and monitor regulatory developments closely. The firms that manage this balance well will gain a structural cost and agility advantage over competitors that remain tied to traditional employment models.
Source notes: This analysis draws on publicly available industry surveys from platforms such as Upwork and Toptal, as well as commentary from HR and workforce strategy publications. Specific statistics cited are based on ranges reported in multiple sources and should be treated as indicative rather than precise. No proprietary or non-public data was used. For verification, readers are advised to consult the latest reports from the World Employment Confederation and national statistics offices.
