Differences, benefits and trade-offs you must bare in mind when deciding on your agency contract.

When U.S. startups consider hiring software engineers through agencies, they often encounter two primary models: staffing and contingency hiring. While both approaches connect companies with talent, their structures, costs, and long-term impact on business differ significantly.

If you’re unsure which hiring model fits your startup best, this article breaks down the key differences, benefits, and trade-offs to help you make an informed decision.

Understanding the Two Models

1. Staffing (Contract-Based Hiring)

Staffing agencies operate on a contract-based model. They hire developers themselves and place them at client companies while managing payroll, benefits, and employment logistics. These agencies charge a markup on the engineer’s salary, typically ranging from 15% to 100%, which becomes their recurring revenue.

• Business Model: You pay the staffing agency monthly based on the engineer’s salary.
• Commitment: Short-term, flexible arrangements (3, 6, or 9-month contracts).
• Employer of Record: The staffing agency, not your company, handles contracts and payroll.
• Best Use Case: Temporary projects, quick hiring needs, or short-term contract work.
• Pros: Fast placements, access to a wide talent pool, payroll and compliance handled.
• Cons: High long-term costs, lower job security for engineers, frequent turnover.

The staffing model is particularly appealing for startups that need to scale up their teams quickly or for companies that frequently work on short-term contracts. However, because staffing agencies prioritize speed over precision, the quality of hires is often inconsistent. Many engineers placed through staffing agencies see their roles as temporary and are likely to leave as soon as a better opportunity arises.

Additionally, since staffing agencies rely on recurring revenue from salaries, they often prioritize quantity over quality. Companies using staffing agencies might cycle through multiple developers before finding the right fit, leading to disruptions in projects and inefficiencies in team performance.

2. Contingency Hiring (Direct Placement)

In contrast, contingency agencies follow a one-time fee model. They source, vet, and introduce candidates to startups, but once the candidate is hired, the relationship with the agency ends. These agencies charge a fee based on the engineer’s annual salary, typically between 15% and 25%.

• Business Model: A one-time placement fee upon hiring a candidate.
• Commitment: A long-term relationship between employer and candidate.
• Employer of Record: Your startup employs the candidate directly.
• Best Use Case: Hiring permanent employees for long-term growth.
• Pros: Cost-effective for long-term hiring, higher quality candidates, better cultural fit.
• Cons: Slower hiring process, requires internal resources to onboard and retain employees.

Contingency hiring is the preferred method for startups looking to invest in long-term growth and stability. Unlike staffing, where candidates are often available on short notice but may lack strong alignment with company values, contingency hiring allows startups to access top-tier, dedicated professionals who are motivated to commit long-term.

A key factor in contingency hiring’s success is the ability to attract passive candidates, meaning highly skilled engineers who are not actively job hunting but are open to the right opportunity. This ensures that companies using contingency hiring gain access to better talent pools rather than competing for the same actively searching candidates that staffing agencies often cycle through.

Why Staffing Agencies Dominate the Market

Staffing agencies are larger and more common than contingency-based firms because their recurring revenue model makes them more profitable. Unlike one-time placement fees, monthly markups on salaries generate consistent income for staffing firms. Over time, they earn significantly more per engineer than contingency agencies.

For example, if a staffing agency marks up an engineer’s salary by 30% on a $100,000/year salary, they collect $2,500/month. Over a year, that’s $30,000—more than a typical contingency placement fee. This revenue model attracts more agencies to staffing rather than contingency hiring.

Additionally, many staffing agencies offer supplementary services such as payroll management, HR support, and compliance handling. This added convenience makes staffing an attractive option for companies that don’t have the internal resources to handle these administrative tasks.

Another reason staffing agencies dominate is their ability to quickly place candidates, thanks to their pre-existing talent pools. This makes them a viable option for companies that require immediate hires, such as startups in rapid scaling phases.

The Problem with Traditional Staffing Agencies

1. High Cost for Startups

The primary downside of staffing agencies is their expensive markup. Since fees range from 15% to 100% of an engineer’s compensation, startups often overpay for talent. This creates tension where:

• Startups pay more than hiring directly.
• Engineers earn less than their market rate, leading to dissatisfaction.
• High turnover occurs, forcing companies to go through multiple replacements.

2. Limited Access to Top Talent

Staffing agencies prioritize fast placements and high turnover, offering clients trial periods where they can swap engineers if they’re not satisfied. This approach attracts engineers who are comfortable with frequent job changes but repels top-tier talent who prefer stability.

Skilled engineers want ownership, long-term commitments, and meaningful projects—not short-term contracts. The best developers often avoid staffing agencies, meaning your startup won’t find top-tier candidates in a staffing firm’s talent pool.

3. Commoditization of Payroll Services

A major reason staffing agencies thrived in the past decade was payroll handling—managing payments, contracts, and compliance for remote hires. However, this service has been commoditized by platforms like Deel, which offer seamless global payroll solutions for under $50 per employee per month.

Startups no longer need a staffing agency to handle payroll, making contingency hiring a more cost-effective option for long-term hires.

Why Contingency Hiring Is the Better Fit for Long-Term Growth

Contingency hiring focuses on quality over speed. Instead of maintaining a pool of pre-vetted engineers ready for rotation, contingency recruiters seek out the best candidates from the entire market.

Advantages of Contingency Hiring:

• Higher-quality candidates: Recruiters invest time in identifying top talent, rather than relying on whoever is available.
• No recurring costs: You pay a one-time fee instead of ongoing markups.
• Stronger cultural fit: Engineers are more likely to align with your company’s vision, reducing turnover.
• Scalability: Better suited for startups looking to build a solid engineering team for long-term growth.

That said, contingency hiring requires more time and effort. Finding and vetting top-tier talent can take weeks, but the long-term benefits outweigh the upfront effort.

Final Thoughts

At Silver.dev, we specialize in contingency-based hiring, helping startups connect with the best Latin American software engineers who are ready to work with U.S. companies. Our rigorous vetting process ensures that you get top-tier developers who align with your company’s mission and culture.

If you’re serious about hiring top talent without unnecessary markups, let’s talk.