LevelUp Leads is a privately held, bootstrapped B2B sales development and appointment-setting agency founded in 2021 by CEO John Karsant. Headquartered in California and operating as a fully remote team, the company specializes in helping startups, SMBs, and mid-market organizations generate predictable pipeline through outsourced SDR services. Rather than simply selling lead lists, LevelUp Leads positions itself as an embedded extension of a client’s sales organization.
The agency focuses on multi-channel outbound programs that blend cold email, cold calling, and LinkedIn outreach, backed by a robust tech stack that includes tools like QuickMail, GetProspect, and leading data providers. Services span fractional SDR support, full-service SDR teams, B2B appointment setting, list building, GTM strategy and campaign design, managed email services, LinkedIn lead generation, and complementary SEO and content services. LevelUp Leads has built particular depth in technology, SaaS, IT services, and other complex B2B verticals where targeted outreach to senior decision-makers is critical.
According to its own published performance metrics, LevelUp Leads has completed more than 850 projects and served over 590 clients across a wide range of industries, achieving an 11:1 average ROI and up to 308% KPI attainment on certain campaigns. The firm is recognized on review platforms such as Clutch and G2, where buyers highlight the team’s communication, responsiveness, and ability to deliver high-quality, ICP-aligned opportunities. This reputation has earned LevelUp Leads repeated inclusion in rankings of top B2B lead generation, outbound call center, and appointment-setting companies.
Strategically, LevelUp Leads sits between large, generalized BPO providers and smaller solo-freelancer lead gen shops. Its 50+ person team, strong client ratings, and dedicated account pods (including SDRs, CSMs, strategists, data researchers, copywriters, and deliverability specialists) make it attractive to B2B companies that need hands-on outbound execution without building an internal SDR function. The agency’s emphasis on transparent reporting, Slack-based collaboration, and ongoing optimization has helped it carve out a differentiated, high-touch position in the crowded outsourced SDR and lead generation services market.
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