Blogs / Software Development
Most founders get this decision wrong because they compare hourly rates instead of the full cost, capability, and delivery risk of each model.
Most founders get this decision wrong — not because they’re careless, but because they’re comparing the wrong things.
They look at hourly rates and assume the agency is more expensive. Or they assume hiring in-house means more control. Sometimes both of those are true. Often, neither is. The real question isn’t which option costs more. It’s which one costs more for what you’re trying to do, right now, at your current stage.
I’ve seen early-stage companies burn through six months hiring two developers, only to realize they needed five different specialties and a project manager. I’ve also seen companies pay agency retainers for three years on work that would’ve been cheaper and faster in-house after month eight. There’s no universal answer here. But there is a framework that makes the decision a lot clearer.
When you hire a software agency, you’re not renting warm bodies. You’re buying a pre-assembled machine. The team already exists. The processes are already in place. The project manager, the architect, the QA lead — they’ve worked together before. You plug your project in and it starts moving.
That’s the pitch. And honestly, for the right project, it holds up.
The cost is higher on paper. Agency rates in New York range from $125 to $275 per hour depending on the firm and the scope. A six-month engagement can run $150,000 to $400,000. That number sounds large until you price out what you’d spend hiring equivalent talent.
A senior full-stack developer in New York costs $140,000–$180,000 per year in base salary. Add benefits, payroll taxes, equipment, onboarding time, and the 30–90 days before they’re actually productive, and you’re looking at $200,000+ annually for one person. For a product that needs a designer, a backend engineer, a front-end engineer, and someone who understands data — you do the math.
Agencies also absorb the turnover risk. If a developer leaves your project, that’s their problem to solve, not yours.
In-house makes sense when your software is the product, or deeply embedded in how your business works every day.
If you’re building a SaaS platform that will be the core of your business for the next decade, at some point you need people whose entire professional focus is that product. They learn the codebase at a depth no external team will match. They’re in your Slack. They’re on your org chart. They care about your roadmap because it’s their roadmap.
The tradeoff is time and overhead. Recruiting a strong engineering team takes months. Onboarding takes more months. Building internal engineering culture — the practices, the code review standards, the documentation habits — takes longer still. None of that is bad. It’s just real, and you need a runway for it.
They treat it as a permanent choice.
It’s not. Most companies that get software right use both at different points. A common pattern: hire an agency to build version one, ship fast, validate the product. Then, once the business model is confirmed and revenue is coming in, start building an internal team to own the long-term codebase.
The other mistake is underestimating scope. Companies come in thinking they need “a simple app.” Six weeks in, it’s a complex system with integrations, custom logic, and edge cases nobody anticipated. Agencies can flex to match that complexity because they have the people. A two-person in-house team usually can’t.
Go with an agency if:
Build in-house if:
Honestly, both if:
Before you sign anything or post a job listing, answer these honestly:
Not your ideal timeline — the one where the board is patient and users aren’t waiting. The real one. If it’s under six months, an agency almost always wins on speed.
Hiring developers without someone who can evaluate their work, review their code, and make architecture decisions is how projects go sideways. An agency brings that built in. In-house hiring without it is a risk.
If you’re still figuring out what you’re building, agencies handle ambiguity better — they’ve seen it before. If your spec is locked and the work is long-term, in-house starts to make more sense.
Someone has to maintain the code. Update the dependencies. Fix the bugs that show up six months in. Who is that? If you don’t have an answer, your post-launch plan has a gap.
People say they want in-house because they want control. I get it. But control over what, exactly?
If it’s control over the code, you own that with a good agency too — the deliverable is yours. If it’s control over the process — the daily standups, the sprint planning, the roadmap — that’s a communication and contract question, not an in-house vs. agency question. Most agencies that work with mid-size companies are used to operating inside the client’s process.
The places where in-house genuinely gives you more control: long-term institutional knowledge, cultural fit, and the ability to make same-day decisions without a statement of work.
It depends on your timeline and required roles. In the short term (under 12 months), an agency is almost always cheaper because you avoid recruiting costs, benefits, equipment, and onboarding delays.
Yes, this is one of the most effective strategies. Use an agency to build and launch version 1.0 quickly, then hire an in-house team to take over maintenance once product-market fit is proven.
An agency gives you instant access to a complete multi-disciplinary team — including front-end, back-end, DevOps, and UI/UX designers — without having to hire separate full-time roles.
Look for relevant past projects, transparent communication, strong engineering standards, and clear code ownership terms.
We work with startups, growing businesses, and established companies — often at different phases of the same engagement. If you’re not sure what you need yet, a discovery call is a good first step.
Guehi And Co. is a New York-based software development agency. Since 2023, we’ve helped businesses across industries build software that actually fits how they work. If you’re weighing your options, we’re happy to talk it through.
Founder of Guehi & Co, a senior product engineering team helping companies build software that fits how they actually work.
