This is one of the most structurally important decisions a founder makes. It's also one of the least well-documented, because every provider presents their model as the best — which doesn't make it easy to choose objectively.
Here's an honest look at all three options, what they truly cost, and what should drive your decision based on your situation.
The question to ask first
Before comparing models, ask yourself a more fundamental question: what exactly do you need?
A founder launching a first MVP has completely different constraints than a product director trying to accelerate an existing roadmap, or a hypergrowth startup that needs to scale fast.
The right model isn't universal. It's the one that fits your stage, your budget, and your capacity to steer.
The freelancer: flexibility at the cost of dependency
What it actually is
A senior freelancer brings sharp expertise and a level of responsiveness that few agencies can match for a specific technology. It's also often a direct relationship, without layers of management in between.
What it actually costs
In France, a senior developer charges between €600 and €900 per day. Over 20 working days a month, that's €12,000–18,000/month — with no employer contributions, no paid leave, no management overhead.
It looks cheaper than hiring at first glance. In practice, the hidden costs add up quickly:
- availability isn't guaranteed
- transitions are painful if the person leaves or raises their rates
- technical lock-in if the code isn't documented
- you still need to manage technically yourself
When it's the right choice
A freelancer makes sense when you have a specific, time-bound need and a technical skill you can evaluate yourself — an audit, a targeted integration, a temporary reinforcement on a given technology.
As a primary model, it's risky if you don't have in-house technical expertise to oversee the work.
In-house hiring: full control at the price of time and fixed costs
What it actually is
Building an internal team means betting on deep product knowledge, continuity, and full alignment with company goals. It's also the most demanding and least reversible model.
What it actually costs
Two senior developers + one product owner in France:
| Role | Gross salary | Employer contributions (~45%) | Monthly total |
|---|---|---|---|
| Senior dev x2 | ~€10,000 | ~€4,500 | ~€14,500 |
| Product Owner | ~€5,500 | ~€2,475 | ~€7,975 |
| Team total | ~€22,500/month |
Add tooling (Jira, GitHub, Figma, Slack: ~€500–800/month), recruitment costs (~15–20% of annual salary per hire, so €12,000–20,000 per person), and transition or slow periods.
Real annual cost for this team: €300,000–350,000, excluding recruitment.
The underestimated risks
Tech recruitment takes time. In France, finding an available, skilled senior developer takes an average of 2 to 4 months. Your roadmap waits.
And when someone leaves — which happens, especially with senior profiles — you lose both product knowledge and months of stability at once.
When it's the right choice
Hiring in-house becomes relevant when:
- technology is at the core of your competitive advantage
- you have a stable, predictable roadmap for the next 12 to 18 months
- you have the management capacity to lead a technical team
- you're in sustained growth that justifies the fixed cost
The agency: execution reliability without fixed costs
What it actually is
An agency brings a team that already works well together, established processes, multi-project experience, and contractual accountability. It absorbs the risks associated with absences, departures, and ramp-up time.
The difference between a good and a bad agency isn't visible in the pitch deck. It shows in the rigour of the scoping, the quality of the deliverables, and the clarity of day-to-day communication.
What it actually costs
| Agency type | Indicative monthly cost | What's included |
|---|---|---|
| Offshore agency | €3,000–10,000 | Dev only, coordination at your expense |
| France / Europe agency | €8,000–20,000 | Dev + management + accountability |
| Subscription model | €5,000–15,000 | Continuous execution + framing |
The real question isn't "how much does the agency cost?" but "what's the cost if it goes wrong?" An offshore agency at €4,000/month that slips three months behind costs you €12,000 in lost time — plus the cost of recovering the project.
What makes the difference
A serious agency doesn't just execute. It structures the backlog, challenges priorities, anticipates technical risks, and maintains a regular delivery cadence. It's an execution partner, not a subcontractor.
"The right provider asks more questions than it receives."
When it's the right choice
An agency makes sense when:
- you want to start fast without spending 3 months recruiting
- you don't have a CTO or senior technical profile to manage the work
- you need a flexible capacity that evolves with your roadmap
- you want to outsource execution responsibility
The honest comparison
| Criterion | Freelancer | In-house | Agency |
|---|---|---|---|
| Start-up cost | Low | High (recruitment) | Low to medium |
| Monthly cost | Medium (variable) | High (fixed) | Medium to high |
| Reversibility | High | Low | High |
| Long-term reliability | Low | High | Medium to high |
| Required management | High | Medium | Low |
| Time to start | Fast | Long (2–4 months) | Fast to medium |
| Risk coverage | None | Partial | Contractual |
What successful founders actually do
Most startups that scale well start with an agency or external provider for the MVP and launch phase, then progressively bring in internal profiles as the roadmap stabilises and needs become clearer.
This approach lets you:
- move fast without over-investing upfront
- learn what you actually need before hiring
- stay fully flexible during the uncertain early phase
Hiring comes later, when you know exactly what profile you're looking for, why, and with what level of autonomy.
The questions to ask before deciding
Before choosing, ask yourself these five questions:
- How much time do I have before I need to ship? If you're under pressure, in-house hiring isn't a realistic option.
- Can I manage technically myself? If not, a freelancer alone is risky.
- Is my need ongoing or one-off? A one-off need calls for a freelancer; an ongoing need calls for an agency or team.
- What's my acceptable risk level? The more critical the product, the more contractual accountability matters.
- Where am I with funding? A high fixed-cost model only makes sense with 12+ months of financial visibility.
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