Hiring an Agency vs Building an Internal Dev Team

The Short Answer

If you need software built in the next quarter, hire an agency. If you have a continuous, multi-year development roadmap and the budget to support it, build an internal team. Most enterprises should start with an agency and transition to internal capability once they understand what they actually need built.

The worst decision? Spending six months hiring a team before you have validated what you are building. We have seen enterprises burn through £200K+ in recruitment and onboarding costs only to realise the product direction was wrong.

Who This Is For

This guide is for enterprise decision-makers — CTOs, VPs of Engineering, or operations directors — who need custom software built and are weighing up the two main paths to get there.

This is not for you if:

• You need a simple marketing website (just hire a freelancer)
• You already have a strong internal team and are looking to augment it (that is a different conversation)
• Your budget is under £50K (an agency engagement at scale starts around £20K, but enterprise work is typically much larger)

The Real Cost Comparison

Let us talk numbers, because this is where most analyses get vague.

Agency Engagement

A credible enterprise agency (not a body shop) will charge £800-£1,500 per day per developer in the UK. For a team of three working full-time, that is roughly £10K-£20K per week, or £120K-£250K for a six-month engagement.

But most people miss an important detail: you are not paying for six months of agency time to get what six months of an internal team would produce. A good agency team ships faster because they have done it before. They have built the authentication system, the admin dashboard, the API integration layer — dozens of times.

Internal Team

Three solid developers (one senior, two mid-level) will cost you:

• Salaries: £200K-£280K per year
• Employer NI and pension: £30K-£40K
• Equipment and software: £15K-£25K
• Office/infrastructure: £10K-£20K
• Recruitment fees (20-25% of salary): £50K-£70K in year one
• Management overhead: priceless, and not in a good way

That is £300K-£450K+ in year one, dropping to £250K-£370K in subsequent years. And that assumes you can actually hire the right people, which in the current market takes three to six months for senior roles.

When an Agency Is the Clear Winner

You are exploring a new product or platform. Do not hire a team to build something you have not validated. An agency can build an MVP, test it with real users, and iterate — all before you have even finished writing a job description for a senior developer.

You need specialist expertise. Migrating off Salesforce? Replacing a legacy Java monolith with a modern stack? These are not problems you want your first internal hires learning on the job. We handle these exact scenarios at LiberateWeb — vendor lock-in escapes and SaaS replacement builds are our bread and butter.

Your timeline is aggressive. If the board wants something live in three months, an agency is your only realistic option.

When an Internal Team Is the Clear Winner

You have a mature product with continuous development needs. If you are shipping features weekly to an established platform, a dedicated internal team makes economic sense after year two.

Your software is your core product. If software is what you sell (not just what you use internally), the institutional knowledge argument becomes overwhelming. Your developers need to understand the domain as deeply as your product managers.

You have strong technical leadership already. An internal team without a competent engineering manager or CTO is a recipe for architectural debt. If you already have that leadership in place, building under them makes sense.

The Hybrid Approach (What We Actually Recommend)

This is what we see working best for enterprises:

1. Engage an agency to build the first version. Get something live, validated, and generating value.
2. Hire a senior developer internally who works alongside the agency team and absorbs the architecture and patterns.
3. Gradually transition day-to-day development to your internal hire(s) while keeping the agency on retainer for architecture guidance, complex features, and code review.
4. Within 12-18 months, you have an internal team that owns the codebase and an agency relationship you can activate when needed.

This approach costs more in the short term but dramatically reduces risk. You do not hire a team for a product that might not work. You do not lose all context when an agency engagement ends.

What About Offshore Teams?

For enterprise-grade software, offshore development agencies rarely deliver what they promise. The cost savings (typically 40-60%) are real, but they are offset by communication overhead, timezone friction, and quality inconsistency. We have been hired more than once to rescue projects that went offshore and came back as unmaintainable spaghetti.

There are excellent individual developers everywhere in the world. But the “hire a cheap offshore team” model is not the same thing, and enterprise leaders should not confuse the two.

Making the Decision

Ask yourself these questions:

1. Do we know exactly what we need built? If no, start with an agency.
2. Do we have technical leadership to manage a team? If no, start with an agency.
3. Is our development need ongoing or project-based? If project-based, agency. If ongoing, start planning for internal.
4. What is our timeline? Under six months to first delivery? Agency.
5. What is our budget tolerance? Can we absorb £300K+ per year indefinitely? Internal team becomes viable.

The enterprises that get this wrong are usually the ones that treat it as a binary, permanent decision. It is not. Start where you are, build what you need, and evolve your approach as your requirements become clearer.

If you are weighing up these options for a specific project, talk to us. We will give you an honest assessment — even if the answer is “you should hire internally for this one.”