For an artificial intelligence project, an agency is justified as soon as the tool touches a process your business depends on — customer relations, pricing, invoicing, document production — because it guarantees what a single freelancer cannot: continuity if someone is unavailable, several skills on the same project, and commitments written into the contract. A freelancer remains the right choice for a short, well-defined task that you can take over yourself.
The question is fair: an independent developer costs less per day, responds quickly and often knows their tool very well. But the right criterion is not the day rate. It is what you risk if the project stops at the wrong moment.
Why AI changes the equation compared with a classic web project
A brochure website, once delivered, lives for a long time without intervention. An AI tool does not. Models evolve every three months, the interfaces of the software it connects to change, and your teams' usage becomes more precise. An AI tool in production is a living system: someone has to monitor it, fix it and improve it. That is what makes the "agency or freelancer" question more decisive than elsewhere.
What an agency brings that a single freelancer cannot
1. Continuity
If the only person who knows the code is no longer available — another assignment, holidays, sick leave — your tool freezes. An agency documents, shares the code across several people and ensures handover. At Codito Ergo Sum, a dedicated consultant follows your company throughout, and the technical side is carried by the team of our CTO, Raphaël Zerbib, a graduate engineer in cybersecurity.
2. Several skills on the same project
Succeeding with an AI project takes at least four perspectives: strategy (choosing the right task to automate), development, data security and team enablement. One person rarely excels at all four. And the most common failure is not technical: it is a tool that works but that nobody uses.
3. Written commitments, not just effort
A freelancer usually commits to time spent. An agency can commit to a result. With us, two commitments appear in the custom development contract: staged payment, where you only pay for what you have validated, and measurable objectives backed by a full or partial refund if they are not met.
4. Long-term operation
The real question is not "who will build it" but "who will run it in two years". An agency can take operational responsibility for your AI tools with a contractual service level: that is the purpose of the Enterprise Partnership. We cover the topic in detail in who manages your AI agents once in production.
Agency vs freelancer: the comparison
| Criterion | Freelancer | Agency |
|---|---|---|
| Day rate | Usually lower | Higher, but covers several skills |
| Continuity if unavailable | Depends on a single person | Handover by the team, documented and shared code |
| Skills involved | One specialty, often very sharp | Strategy, development, security, team enablement |
| Commitment | Usually effort-based (time spent) | Can be results-based, written into the contract |
| Maintenance | Renegotiated case by case | Operations contract with a service level |
| Best for | A short, well-defined task | A tool tied to a critical process |
When a freelancer is the best choice
An agency is not always the right answer. An independent professional is often better suited if:
- the need is short and perfectly defined, for example a simple automation between two tools;
- the tool does not touch a process your revenue depends on;
- you have someone in-house able to take over the code if the provider disappears;
- you already know exactly what to build and are looking for a pair of hands rather than advice.
In that case, hire a good freelancer and insist on three things: the code and access in your name, minimal documentation, and a written delivery date.
Five questions to ask, to an agency and a freelancer alike
- Who actually works on my project, and who takes over if that person becomes unavailable?
- Who owns the code, the data and the accounts at the end of the project?
- What do you commit to in writing: time spent or a measurable result?
- Who maintains the tool in a year, and on what terms?
- What quantified results can you show on cases comparable to mine?
To choose between several agencies, see our guide how to choose an AI agency.
What you get with Codito Ergo Sum
- a dedicated consultant who follows your company throughout;
- a technical team led by a CTO, not a single person;
- the code, data and accounts in your name at delivery;
- staged payment on validated milestones and objectives written into the contract, with a refund if they are not met;
- proven results: €109,000 a year in hidden costs uncovered at a 100-employee group, €185,000 to €215,000 a year of recoverable time identified at a luxury retail-display producer operating in four countries.
The simplest way to decide is to discuss your own case: book a 30-minute call. If a freelancer is enough for your need, we will tell you.