The verdict
For a lean B2B founder, the deciding question is your primary channel, not your budget. If LinkedIn is the motion, Kanbox wins on focus and price: scraping, automation and a Kanban pipeline in one tool from 25 EUR/mo. If cold email or true multichannel is the motion, Lemlist wins decisively, because its lead database and built-in warmup mean you ship from one platform instead of four. Kanbox is the sharper LinkedIn instrument; Lemlist is the more complete outreach engine. Most founders running real cold-email volume will outgrow Kanbox's missing warmup and database, which is exactly the gap Lemlist is built to fill, so for the broad outreach use case Lemlist is the safer long-term pick, and Kanbox the smart specialist choice when LinkedIn is genuinely your whole channel.