Buyer guide

AI agency vs in-house vs consultancy

Hire in-house when AI is the product you sell and you can wait two quarters to staff two senior people. Use a big consultancy when the board needs political cover more than a shipped system. Use a specialist software factory when you need one owned workflow in production in weeks, on your data. The expensive mistake is mismatching the route, not the route itself.

Kemeny Studio is the factory column. We disclose that because honesty is the comparison. Last reviewed 8 September 2026.

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Three routes, one table

Staff augmentation is not in this table. Extra hands on your tickets are useful; they are not a system with an owner after launch.

Dimension	In-house team	Consultancy	Software factory
What you actually receive	Headcount: engineers on payroll who know your business over years.	A roadmap, a deck, and a recommendation. The system is usually someone else’s later job.	One production system on one workflow, on your data, with code and prompts you own.
Time to first production system	Two quarters or more to hire two senior people who will not leave in year one.	Weeks of discovery. Months before anything runs in your stack, if it ever does.	Weeks after a scoped kickoff. Not this week: that is a subscription platform.
Who owns the system	You, if the people stay. One resignation can empty the capability.	You own the slides. The working system, if it exists, is usually still on a vendor clock.	You. Source, prompts, and data are written into the statement of work before code exists.
Cost shape	Salaries, recruiting, tools, and the months of empty calendar while you hire.	A large professional-services fee for process and brand cover, not for a shipped agent.	Fixed quote per stage after a measured baseline. Market builds for one agent typically sit in the $20k–$80k USD band, plus a flat monthly operation. Not a Kemeny price.
After launch	Your team tunes it, or quality decays. You need at least two people so one leaving is not an incident.	The engagement ends. Drift is your problem unless you buy a second phase.	Someone is accountable: we can operate it, or we hand over the evaluation tooling so you can.
Best for	AI is the product customers pay you for, and you can wait to staff it.	A board or regulator needs a brand they already trust more than a working system this quarter.	One ops workflow, a sponsor with access, and a need to be live in weeks on systems you already run.
Honest weakness	Slow, expensive, and fragile until the second hire lands. Overkill for one internal workflow.	You can finish with a beautiful diagnosis and still have no agent in production.	Wrong if you need political cover, a same-week launch, or an AI product as your core business.

Decision

If you need X, choose Y

Choose in-house if

the model is the product, you can wait two quarters, and you will keep two senior people. Expertise compounds only if it stays.

Choose a consultancy if

the board needs brand cover, the work is a transformation programme, and shipping one workflow this quarter is not the point.

Choose a factory if

you have one process with a measured baseline, a sponsor who can open the systems, and you want the code. That is Kemeny Studio’s column.

Choose none of them if

nobody can name the workflow, there is no before-number, or you need a chatbot live this week. Buy a platform, or wait.

Field proof

What a factory actually shipped

These are Kemeny Studio production systems, named on /cases. We do not invent Reddit quotes or third-party ROI percentages.

Document review: 70% faster, national-scale, Chile.

Transaction matching: 95% accuracy on 160,000+ items, retail, Mexico.

Call QA: 3% manual sampling to 100% coverage, call center, Chile.

Retail planning on the data layer: 2 weeks-for-1 to 1 week-for-4; teams about 8×. Chile and Mexico. You do not always need to agentize.

Disclosure

When not to hire us

Do not hire Kemeny Studio if you need a same-week chatbot, a McKinsey-shaped transformation deck, or an in-house AI product team. We will tell you to buy a platform, to hire a consultancy, or to hire two senior people. The vendor evaluation guide is the checklist we want used on us. What a factory is, in our terms, is on the software factory page. Cost ranges live on the implementation cost hub.

FAQ

Questions people actually ask

Should I hire an in-house AI team or an agency?

Hire in-house when AI is the product you sell and you can wait to staff two senior people. Use a specialist factory when AI is one ops workflow, you need it in production in weeks, and you want to own the code. An agency that only staffs your tickets is a third shape: useful for extra hands, not for a system with an owner after launch.

When is a consultancy better than an AI agency?

When the buyer is a board or a regulator, and the deliverable is alignment, process, and a brand they already trust. That is a real job. It is a bad job if what you needed was one agent running on your invoices. Pay for cover when you need cover; do not pay for cover when you need software.

How long does it take to hire an in-house AI team?

Plan on two quarters before two senior people are productive, then budget for the risk that one of them leaves. That is why in-house is the right call for a core product and the wrong call for a single back-office workflow.

Do I own the code if I hire an AI agency or factory?

Only if the contract says so before anyone writes a line. Ask for source, prompts, and data in the statement of work. A subscription stops the day you stop paying. A factory that will not write ownership down is selling access, not a system.

Is an AI factory cheaper than an in-house team?

Not always. In-house is cheaper over years if AI is the product and the people stay. A factory is cheaper when you need one workflow shipped once, with a flat operation instead of two salaries. Run the arithmetic on your volume; the cost hub does that without inventing a Kemeny quote.

Can I start with a partner and hire internally later?

Yes, if ownership and a handoff are in the statement of work. The useful sequence is: ship one workflow with a factory, keep the code, then hire the people who will extend it. Starting with three consultancies and no internal lead is how you get three platforms and nobody who can change them.

Reviewed 8 September 2026. FAQ matches the comparison questions in the 2026 SERP for this decision, not invented filler.

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