Founders often ask "should we hire a CTO?" the same way they ask "should we hire a CFO?" — like it's a binary. It isn't. The CTO role evolves through four distinct stages of company growth, and the right answer depends on which stage you're in.
Stage 1: founder-CTO (0–15 people, pre-Series A)
The founder writes the code. They are the engineering team. This is right because the company, the product, and the codebase are functionally the same thing. Hiring a "CTO" at this stage is almost always a mistake — there's nothing to manage and the founder has the deepest context. The right hires here are individual contributors, not leaders.
Stage 2: technical co-founder + senior IC (15–40 people, Series A)
One person owns "engineering," but the title is informal. They might call themselves CTO on LinkedIn, but the role is really a senior individual contributor plus tech lead. They write code most days, run a small team, and make architectural calls. The org doesn't need a real CTO yet — but it does need someone with that scope and authority.
Stage 3: head of engineering (40–80 people, Series B)
Now the role is real. People manager, hiring lead, budget owner, cross-functional partner to product. This is where the founder-as-CTO pattern starts to break — building the platform was their job; running an engineering organization is a different job. Often the right move is to title this person VP of Engineering and start looking for a separate CTO who's strategic, not operational.
Stage 4: full-time CTO (80+ people, Series C and beyond)
Strategic, board-facing, future-looking. By this point most companies have separate VPE and CTO functions: the VPE runs the day-to-day organization, the CTO owns architecture, technology strategy, technical brand, and key technology partnerships. Hiring a full-time CTO before this stage often produces an expensive senior hire with nothing to do.
Where founders go wrong
The most common mistake is hiring a "CTO" at Stage 2 from outside the company. They cost $400,000–$600,000 per year all-in, they don't have institutional knowledge, and they're operating with a Stage 1 problem set — there isn't a team to lead, just code to write. Most don't last eighteen months. The company churns through expensive hires while the founder reluctantly returns to writing code.
The fractional alternative
At Stages 2 and 3, fractional CTOs are often the right answer. You get senior expertise without the comp burden, with a clear exit ramp when the role outgrows the model. The fractional CTO can build the engineering structure, hire the next layer, and hand off to a full-time successor when the company is ready — often saving the company a year of expensive missteps.
The right question isn't "do we need a CTO?" It's "what's the engineering function we need this quarter, and what's the cheapest way to get it?" That answer changes every six months. Asking it every six months is the discipline.
If you're in Stage 2 or 3 and trying to figure out the next hire, let's talk. The fractional model is built for exactly this transition.