Data
AI
The Stack Underneath
Last updated: April 23, 2026
A practical comparison to help you decide between building an internal engineering team and partnering with a development agency.
Hiring in-house developers gives you maximum control and cultural alignment. Partnering with an agency gives you speed, flexibility, and access to diverse expertise without long-term HR commitments. The right choice depends on your stage, budget, and how central software is to your business. Most growing companies use a hybrid approach.
| Criteria | Agency (Brilworks) | In-House Team |
|---|---|---|
| Time to Hire | Team onboarded in 1-2 weeks. Pre-vetted developers ready to contribute immediately. | Average 3-6 months to hire a senior developer. Recruiting, interviewing, and onboarding take time. |
| Cost (First Year) | Dedicated developer from $2,500/mo. No benefits, equipment, office space, or HR overhead. | Senior developer: $120K-200K salary + 30-40% benefits overhead. Total cost: $156K-280K/year. |
| Cultural Alignment | Remote collaboration with your tools and processes. Daily standups and Slack integration bridge the gap. | Full immersion in company culture, values, and context. Better alignment on long-term vision. |
| Skill Diversity | Access to 100+ specialists across React, Node, AI/ML, AWS, mobile, and more. Switch expertise as needed. | Limited to skills of current team members. Adding new expertise requires new hires. |
| Scalability | Scale up or down based on project needs. Add developers in weeks, reduce when workload decreases. | Scaling up requires months of recruiting. Scaling down means layoffs — costly and disruptive. |
| Knowledge Retention | Knowledge documented and transferred. Risk of context loss if engagement ends, mitigated by documentation. | Institutional knowledge stays in-house. Long-tenured employees deeply understand the codebase. |
| Management Overhead | Agency handles team management, performance reviews, and skill development. You focus on product direction. | Requires engineering managers, 1:1s, career development plans, performance reviews, and HR processes. |
| Long-Term Cost (3+ Years) | Costs remain predictable and adjustable. No severance, no benefits inflation, no retention bonuses. | Per-person cost may be lower long-term if retention is high. But turnover resets the investment. |
Agency (Brilworks)
Team onboarded in 1-2 weeks. Pre-vetted developers ready to contribute immediately.
In-House Team
Average 3-6 months to hire a senior developer. Recruiting, interviewing, and onboarding take time.
Agency (Brilworks)
Dedicated developer from $2,500/mo. No benefits, equipment, office space, or HR overhead.
In-House Team
Senior developer: $120K-200K salary + 30-40% benefits overhead. Total cost: $156K-280K/year.
Agency (Brilworks)
Remote collaboration with your tools and processes. Daily standups and Slack integration bridge the gap.
In-House Team
Full immersion in company culture, values, and context. Better alignment on long-term vision.
Agency (Brilworks)
Access to 100+ specialists across React, Node, AI/ML, AWS, mobile, and more. Switch expertise as needed.
In-House Team
Limited to skills of current team members. Adding new expertise requires new hires.
Agency (Brilworks)
Scale up or down based on project needs. Add developers in weeks, reduce when workload decreases.
In-House Team
Scaling up requires months of recruiting. Scaling down means layoffs — costly and disruptive.
Agency (Brilworks)
Knowledge documented and transferred. Risk of context loss if engagement ends, mitigated by documentation.
In-House Team
Institutional knowledge stays in-house. Long-tenured employees deeply understand the codebase.
Agency (Brilworks)
Agency handles team management, performance reviews, and skill development. You focus on product direction.
In-House Team
Requires engineering managers, 1:1s, career development plans, performance reviews, and HR processes.
Agency (Brilworks)
Costs remain predictable and adjustable. No severance, no benefits inflation, no retention bonuses.
In-House Team
Per-person cost may be lower long-term if retention is high. But turnover resets the investment.
Partner with an agency like Brilworks when you need to move fast, lack recruiting bandwidth, need specialized skills for a defined period, or want to supplement your core team. Build in-house when software is your core product, you need deep institutional knowledge, and you can invest the time and budget in recruiting and retention. The best approach is often hybrid: a small in-house core team augmented by agency expertise for scaling, specialized work, or parallel initiatives.
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