The verdict in three sentences
An SME still steering sales, stock and accounting across scattered spreadsheets loses time and decides late. An ETL + warehouse + dashboards foundation consolidates these sources into a single source of truth, for a budget of 15,000 to 28,000 EUR delivered in 8 to 14 weeks. The right reporting tool (open-source Metabase or Power BI) depends on your license budget and internal skills.
The cost breakdown
An SME data project splits into four building blocks. 2026 order of magnitude, EUR:
| Block | Content | Cost |
|---|---|---|
| ETL / source connectors | extract sales, stock, accounting, CRM | 6,000-12,000 EUR |
| Data warehouse | model, fact tables, historization | 4,000 EUR |
| Dashboards | Metabase or Power BI, 6-10 views | 4,000-8,000 EUR |
| Training + docs | team onboarding, autonomy | 1,000-4,000 EUR |
| Project total | 15,000-28,000 EUR |
Add a recurring cost: warehouse hosting 100-300 EUR/month, and connector maintenance 200-500 EUR/month depending on the number of sources.
Metabase or Power BI: comparison
The reporting tool shapes the 5-year license budget:
| Criterion | Metabase (open source) | Power BI (Microsoft) |
|---|---|---|
| License | free (self-host) or ~85 EUR/month cloud | ~10 EUR/user/month (Pro) |
| Cost 20 users / 5 years | ~5,000 EUR (self-host) | ~12,000 EUR |
| Learning curve | fast, business-oriented | longer, very powerful |
| Microsoft ecosystem | limited | native (Excel, Teams, Azure) |
| Advanced SQL queries | yes | yes |
For an SME already on Microsoft 365, Power BI integrates without friction; to keep license costs down, self-hosted Metabase is unbeatable.
Packaged BI SaaS or custom?
Two paths. Ready-made BI SaaS (standard connectors) starts fast but caps out on exotic sources; custom models your business exactly.
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| Approach | Timeline | Upfront cost | Limit |
|---|---|---|---|
| Packaged BI SaaS | 3-5 weeks | 8,000-15,000 EUR + subscription | non-standard sources blocked |
| Custom foundation | 8-14 weeks | 15,000-28,000 EUR | longer timeline |
Rule of thumb: SaaS if your sources are standard (Shopify, Sage, HubSpot); custom as soon as an in-house ERP or specific business files come into play.
Mini case study
Sophie runs a distribution SME near Lyon, 32 staff. Her reps consolidated sales by hand: 6 hours a week, about 12,000 EUR/year of lost time, and reorder decisions 5 days late. She invests 22,000 EUR in an ETL + Metabase foundation, delivered in 11 weeks. Result: automatic daily reporting, 6 hours/week recovered, and one stockout avoided on her flagship SKU that alone preserved 18,000 EUR of revenue. Payback reached in under 12 months.
FAQ
How long until the first dashboards? A first usable dashboard often lands in 4-5 weeks; the complete, hardened foundation in 8 to 14 weeks depending on source count.
Do we need an in-house data engineer? Not to start: the foundation is built to be self-run after training. A data point-person at 0.2 FTE is generally enough for operations.
Is Metabase really free? The self-hosted open-source version is free in licensing; you pay for hosting and administration. The cloud version starts around 85 EUR/month.
Can we connect our in-house ERP? Yes, that's precisely the point of custom: a dedicated connector reads your database or its API. Budget 2,000-5,000 EUR per specific source.
What concrete gain should I expect? Depending on the case, 4 to 8 hours/week of manual consolidation saved and faster stock and margin decisions. ROI typically shows within 12-18 months.
Let's scope your project. List your sources (ERP, CRM, accounting, e-commerce) and the 5 metrics you want to steer: we'll quote the ETL foundation and dashboards. 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.
