Belgium is a unique B2B market: trilingual, dense with SMEs, rapidly accelerating digital adoption. Generating B2B leads in Belgium requires an adaptation that generic tools cannot provide.

The Belgian B2B market in figures

1.2 million active companies (CBE 2025), 97% of which are SMEs with fewer than 50 employees. Addressable B2B market: 40,000 to 120,000 companies depending on the ICP.

Distribution: 60% Flanders (Dutch), 30% Wallonia (French), 10% Brussels (bilingual FR/NL). A message in French only = only 40% of the potential market.

B2B data sources for Belgium

CBE (Crossroads Bank for Enterprises): Belgian equivalent of the French SIRENE. Open Data API available.

LinkedIn Sales Navigator: good coverage for companies with 20+ employees and decision-maker profiles in major cities.

Graydon / Dun & Bradstreet: detailed financial data on Belgian companies.

Companyweb: financial data + directors + links between companies. Excellent for identifying complex decision structures.

Linguistic and cultural specificities

Flanders: direct decision-makers, results-oriented. Language: Dutch mandatory, English acceptable for IT/Tech, French rarely accepted.

Wallonia: culture close to France. French standard. Relationship is important — several exchanges before the meeting.

Brussels: English often the working language in international environments. FR/NL bilingualism expected for local companies.

The Lead-Gene machine automatically generates sequences in the detected language (NL/FR/EN) per LinkedIn profile and region.

GDPR compliance in Belgium

The APD (Data Protection Authority) enforces GDPR. Permitted: B2B email prospecting on legitimate interest basis with clear opt-out, use of CBE data (public).

Prohibited: buying databases without traceability, prospecting to personal email addresses, data from private social networks. The Belgian APD is particularly vigilant on opt-out quality.

Recommended strategy for Belgium

Step 1: segmentation by linguistic region. Brussels first (bilingual, sophisticated decision-makers), then Flanders or Wallonia.

Step 2: multi-base sourcing (CBE + Apollo + LinkedIn + Companyweb).

Step 3: distinct sequences per region (NL Flanders, FR Wallonia, FR/EN Brussels).

Step 4: Belgian intent signals (Startups.be, VDAB Flanders, Forem Wallonia, Actiris Brussels, sector events Batibouw/SME Fair).

Results observed on the Belgian market

Across 23 Lead-Gene clients targeting Belgium (2024-2026): cold email response rate 6.8%, LinkedIn 9.1% (less saturated market than France), average CPM £80 to £150.

Flemish market most performant with NL sequences. Wallonia responds better to personalised approaches. Brussels excellent on LinkedIn for HR, Finance, General Management.