Founders · October 8, 2026 · 2 min read

Fractional CTO, agency or freelancer: which one do you need?

If you're building software without a technical co-founder, you'll meet three kinds of help: freelancers, agencies and fractional CTOs. They solve different problems, and picking the wrong one is one of the most expensive early mistakes a founder can make.

Freelancer: you know exactly what to build

A freelancer executes well-defined tasks. That works when someone on your side can write the spec, review the code and make the technical calls. Without that person, you're trusting work you can't evaluate.

  • Best for: clear, contained tasks.
  • Watch out for: no one owning architecture, security or the bigger picture.

Agency: a large, defined project

Agencies bring a team: design, development, project management. They suit bigger projects with a fixed scope and budget. The trade-off is cost, slower change, and the risk that your product is one of many on their board.

  • Best for: large builds with a stable scope.
  • Watch out for: long contracts, lock-in and junior staff doing the work.

Fractional CTO: you need judgment as much as code

A fractional CTO takes responsibility for technical direction a few days a month: which stack, which vendors, who to hire, what to build next, and whether the work being delivered is any good. Some only advise; others also build.

  • Best for: founders making technical decisions they can't evaluate.
  • Watch out for: advice with no one accountable for shipping it.

Questions that decide it

  1. Can someone on your team review code? If not, start with a fractional CTO before hiring anyone else.
  2. Is the scope fixed for the next three months? If yes, a fixed-price build makes sense. If not, you need ongoing help.
  3. Who owns the code and the accounts? Whoever you choose, insist it's you, from day one.

Deeraf combines the parts that matter: On Call gives you a technical partner's judgment, and fixed-price Build Sprints get things shipped, with one point of contact accountable for both.

Keep reading

Want a second pair of eyes on your app?

Book a Tech Check