The verdict in three sentences
Cegid, ACD and Sage remain unbeatable on the production engine: don't replace them. Custom software wins on business specifics and the client relationship, where the vendor charges heavily or does nothing. In 2026 the winning trade-off is almost always hybrid: suite + custom brick, to minimize TCO and vendor lock-in.
Cost compared: subscription vs one-shot
The debate isn't "free vs paid" but "recurring cost that grows with headcount vs an amortized investment." 2026 order of magnitude:
| Option | Upfront cost | Recurring cost | Vendor lock-in |
|---|---|---|---|
| Vendor suite only | 2,000 - 8,000 EUR (setup) | 40 - 90 EUR/user/month | High |
| Full custom | 30,000 - 70,000 EUR | Maintenance 15%/year | None (you own the code) |
| Hybrid (suite + custom) | 15,000 - 40,000 EUR | Licenses + reduced maintenance | Medium |
At 12 staff and 70 EUR/user/month, the suite alone is 10,080 EUR/year in licenses, excluding add-ons.
5-year TCO and decision criteria
Over five years, the custom brick pays off as soon as the vendor charges for pricey modules or forces costly manual workarounds.
| Scenario (12 users) | 5-year TCO | Note |
|---|---|---|
| Suite only | 55,000 - 70,000 EUR | Zero specifics covered |
| Full custom | 55,000 - 100,000 EUR | Total independence |
| Hybrid | 45,000 - 75,000 EUR | Best value/risk ratio |
Decisive criteria: the specificity of your processes, tolerance for vendor lock-in, data migration complexity, and per-staff cost that rises with growth.
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Mini case study
Sophie, principal of a 12-person firm in Rennes, pays 10,080 EUR/year in licenses and loses time on a client reporting process her suite lacks. She keeps Cegid for production and adds a custom reporting + portal brick at 32,000 EUR (maintenance 4,800 EUR/year). Over 5 years her hybrid TCO is ~72,000 EUR vs ~63,000 EUR for suite-only, but she bills 15,000 EUR/year of advisory work the reporting makes possible: net positive from year 2.
FAQ
Is full custom risky? It is if you rebuild the accounting engine. Limited to specifics and the client relationship, the risk is low and independence total.
Why does hybrid usually win? Because it keeps the vendor's regulatory robustness (tax updates) while covering your own processes for 15,000 to 40,000 EUR.
What does vendor lock-in really cost? License hikes, separately billed modules and forced migrations. Over 5 years it weighs several thousand euros you don't control.
Is data migration included? Rarely in licenses. In custom builds, budget 3,000 to 8,000 EUR depending on volume and the quality of existing data.
How to decide fast? List 5 critical processes: if 3+ aren't covered by the suite, a custom brick is justified.
Let's scope your project. Send us your current suite, user count and your 5 critical processes: we'll price the most cost-effective hybrid scenario. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
