Agency vs Freelancer vs SaaS for a Business App in 2026

The verdict in three sentences

The freelancer wins on raw price but exposes you to continuity risk: a single brain, no guaranteed handover. The agency costs more per day but absorbs that risk through a team, a contractual maintenance plan and a warranty. The SaaS only makes sense if your process is standard: past 20-25 seats or any real customisation, custom software becomes competitive again over 3 years.

Three models, three cost structures

Before comparing, set the 2026 assumptions: a medium-complexity business app (one internal workflow, 6 to 10 screens, one accounting integration) is roughly 60 to 90 person-days. Here are the orders of magnitude seen on the Paris market.

The freelance day rate looks unbeatable, but add the hidden cost of internal steering: without a project manager, your own team absorbs the back-and-forth. The agency prices that steering in, which explains part of the gap.

Total cost over 3 years, not the initial quote

The real question is not build price but total cost of ownership (TCO) over 3 years, maintenance included. Take a reference project at 45,000 EUR in an agency, with maintenance at 18 % of the build per year.

Over 3 years the SaaS stays cheapest at 25 seats. But project to 5 years and 40 seats: the subscription climbs to 96,000 EUR while custom software, already amortised, caps around 90,000 EUR maintenance included, and it is yours. The tipping point sits near 30 users over a 4-year horizon.

Mini case study

Thomas runs a trading SME in Paris, 25 users to equip with a supplier-order tracking tool. A generic SaaS at 40 EUR/month would cost 12,000 EUR/year, i.e. 36,000 EUR over 3 years, but it does not handle his tiered rebate rules. An agency quotes custom at 45,000 EUR plus 8,100 EUR/year maintenance: 69,300 EUR over 3 years. At this stage SaaS wins. But Thomas plans 45 seats in 2027: SaaS would jump to 21,600 EUR/year. Over 5 years, custom (77,400 EUR) drops below SaaS (99,000 EUR) and he keeps ownership of the code. He picks the agency for the warranty and backup team.

FAQ

Is the freelancer really cheaper in the end? On raw build, yes: 20 to 30 % less than an agency. But without warranty or backup, provision 15 to 20 % for the risk of handover should they become unavailable.

When does SaaS become the wrong choice? Past ~25 users or when 30 % of your needs fall outside the standard. Per-seat pricing turns punitive at scale and constrains your specific processes.

What is application maintenance and what does it cost? It covers fixes, evolutions and security: budget 15 to 20 % of build cost per year, i.e. 6,750 to 9,000 EUR for a 45,000 EUR project.

Can we start on SaaS then migrate to custom? Yes, it is a prudent strategy: validate the need on SaaS for 12-18 months, then internalise the data into a custom tool once ROI is proven.

How long to deliver a business app? Budget 2 to 4 months with an agency, 3 to 5 months with a freelancer depending on availability, and 2 to 6 weeks of configuration for a SaaS.

Let's scope your project. Describe the process to digitise, the number of seats and your deadline: we tell you honestly whether SaaS is enough or whether custom pays off, with the numbers. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.