B2B lead generation: complete method 2026

B2B lead generation is the cornerstone of any sales strategy. Yet most companies do it in a disorganised way · with poor quality lists, unclear KPIs and no qualification method. Here's the systematic way we do it at devlo.

Step 1: Define the KPI precisely

The Ideal Customer Profile (ICP) is not a marketing persona. It is a precise definition of the companies and decision-makers who are most likely to buy your product or service. Key variables: company size (number of employees, turnover), business sector (NAF/NACE codes), geographical location, technology stack, behavioural signals (fund-raising, recruitment, etc.).

Step 2: Mapping the TAM

The Total Addressable Market (TAM) is the total number of companies corresponding to your KPI. Calculate it using LinkedIn Sales Navigator, Apollo or sector databases. A well-mapped TAM gives you a clear view of your growth potential and enables you to prioritise your efforts.

Step 3: Sourcing and enriching contacts

For each target account, identify the right decision-makers (title, seniority, responsibilities). Source their contact details via Apollo, Hunter, Dropcontact or Clay. Add contextual data, then measure enriched and raw lists separately before drawing a performance conclusion.

Step 4: Qualify before prospecting

Not all leads deserve the same attention. Create a score based on ICP fit (0-10) and intent signals (0-10). Leads with a score > 15/20 are given priority. The others are put into "nurturing" or excluded. This manual qualification is time-consuming, but it is the key to a quality pipeline.

Step 5: Keep the list up to date

A lead list deteriorates over time. Put data hygiene in place: check emails, update roles and remove companies that no longer match the ICP. Track freshness by source and verification date.

Controls in the devlo method

Each engagement defines the ICP, sources, verification rules and acceptance criteria before activation. Volume, deliverability and quality are then reported by cohort against the baseline agreed with the client.

Conclusion

Generating quality B2B leads is a rigorous process that requires tools, expertise and time. At devlo, this is a service in its own right, separate from prospecting. A good list is the foundation of any successful campaign.