What are the main client acquisition channels for service B2B companies right now?

Hey guys! Anyone from service B2B companies here, what are the main client acquisition channels for you right now? We're AI agency, building custom AI agents and voice bots for healthcare, real estate, hospitality and e-commerce: voice receptionists, back office automation, agents that take repetitive tasks off the team. Ofc lead gen is the biggest part for anyone on that niche, at least for every agency founder I talk to. So I'm really curious what works for you guys?