Every growing company hits this decision point. You've scaled past the point where everyone just figures out their own tech setup, but you're not sure whether to hire an IT manager, contract out to a managed service provider, or invest in a platform that handles most of it without either. The answer depends on what kind of company you're building, and most people asking the question are missing half the variables.

Let's define the terms properly first, because they get conflated constantly.

ITaaS vs in-house: what each actually means

IT as a Service (ITaaS) means outsourcing some or all of your IT operations to an external provider. This can range from a managed service provider that handles your helpdesk and infrastructure, to a modern IT operations platform that automates provisioning, device management, and support, leaving only the high-judgment work for your internal team. The spectrum is wide.

In-house IT means hiring people whose full-time job is IT. At small companies, this is one generalist who handles everything. At larger companies, it's a team with specialists for security, helpdesk, infrastructure, and procurement. The advantage is control and institutional knowledge. The cost is headcount, management overhead, and the expertise gaps that always exist in any team.

The reality for most fast-growing companies: neither pure model makes sense. The question isn't "ITaaS or in-house" but "which parts of IT should be handled by a platform or service, and which need a human who owns it."

"The companies that get IT right aren't choosing between a platform and a person. They're using the platform to eliminate the work that doesn't need a person, then hiring people for the work that does."

When each model makes sense

Pure ITaaS makes sense when: you're under 50 people, growing quickly, geographically distributed from day one, and don't have the budget for a dedicated hire. An MSP or platform handles the table-stakes work while your ops team maintains oversight.

Pure in-house makes sense when: you have regulatory requirements that demand deep internal expertise (finance, healthcare, defense), you're operating at a scale where a specialist team is clearly cost-effective, or you have unique security or infrastructure requirements that off-the-shelf services can't handle.

The hybrid model, which most 50 to 500 person companies end up with, looks like this: one or two internal IT people who own strategy, vendor relationships, security policy, and the genuinely complex problems. An IT platform that handles provisioning, asset management, helpdesk triage, and compliance monitoring automatically. Possibly an MSP for specific areas like network infrastructure or security operations. The platform does the volume work. The people do the judgment work.

A cost comparison framework

When evaluating the build vs. buy decision, these are the numbers that matter:

Questions to ask before deciding

Before committing to either path, work through these. What is your projected headcount in 18 months? If you're doubling, the hiring decision you make today will be inadequate by then. Where are your employees located? Global distribution changes the calculation significantly: local IT support in every country is expensive, remote platforms are not. What are your compliance requirements? SOC 2, ISO 27001, and HIPAA each imply different levels of internal expertise. And finally: what do you actually want your IT function to be doing with its time? If the answer is managing tickets and provisioning laptops, you have the wrong answer. That work should be automated.

The companies that make this decision well are the ones that start with what outcome they need, not what solution they're comfortable with. Faster onboarding, better security posture, lower support costs, and audit readiness can all be achieved with the right combination of platform and people. The ratio depends on your specific context, not on a general preference for insourcing or outsourcing.