Legitimate interest under the GDPR: basis for B2B outreach

How does legitimate interest work?

Unlike consent, legitimate interest does not require asking permission beforehand — it requires the controller to do the thinking beforehand. The standard tool is the balancing test, usually documented as a legitimate interest assessment (LIA), with three questions. Is the interest genuine and lawful? The GDPR itself notes in Recital 47 that direct marketing may qualify. Is the processing necessary and proportionate — could the purpose be achieved with less data? And does the balance hold: would a professional in this role reasonably expect this kind of contact, and are their rights protected?

Relying on it also triggers duties: informing data subjects about the processing and its basis, offering a clear and immediate way to object, minimizing the data collected, and not retaining it longer than needed. In B2B prospecting, national ePrivacy rules layer on top of the GDPR and differ between countries, which is why serious programs map the rules per market they contact.

Why it matters in B2B

Legitimate interest is the legal backbone of most compliant B2B outreach in Europe: it is what allows a company to email a plant manager about an offer plausibly relevant to their job, provided the program is targeted, transparent and respectful of objections. It is also a quality filter in disguise — the same practices the balancing test rewards (professional relevance, data minimization, easy opt-out) are the practices that make cold email perform.

Picture a hypothetical machinery supplier preparing a campaign toward production directors. Before sending, it documents its LIA, limits data to professional fields, adds sender identification and a working opt-out to every message, and configures its tools to suppress anyone who objects. When a recipient asks "where did you get my data?", the team has an answer instead of a problem.

AVANTAI builds these safeguards — documented basis, suppression lists, opt-out handling — into its AI outbound systems, and reviews them in every outbound audit.

This article is general information about the GDPR, not legal advice. For decisions about your specific processing, consult a qualified data protection professional.