
LevelUp Leads
ReviewOutsourced SDR agency serving 120+ clients with proven ROI
About LevelUp Leads
LevelUp Leads is a B2B sales development and appointment setting agency founded in 2021 by John Karsant, headquartered in San Francisco with operations in Colombia. With 4.9 G2 rating, 51 Clutch reviews, and 853+ projects completed for 120+ clients, they deliver omnichannel outreach combining email, LinkedIn, and cold calling.
Who LevelUp Leads Is Best For
B2B companies seeking flexible outsourced SDR services. This agency is typically a strong fit for organizations that value consistent execution, clear reporting, and practical collaboration in San Francisco, United States. Engagements perform best when stakeholders align on measurable KPIs and maintain a regular optimization cadence across strategy and delivery.
Why Choose LevelUp Leads
LevelUp Leads Services
More Lead Gen Agencies

Boundify
★ 7.5B2B tech brands that need paid-media demand gen tied to HubSpot revenue reporting
Boundify is a B2B demand generation and HubSpot agency in Greenville, South Carolina. The official homepage leads with paid media that captures demand, builds brand on LinkedIn, and connects spend to revenue in HubSpot for technology, energy, commercial real estate, manufacturing, and business-services brands. Directories list a 5.0 rating from 7 reviews, HQ at 141 Traction Street, founded 2011, 2-9 employees, $100-149/hr, and a $1,000+ minimum.

Cold Call Crew
★ 7.5B2B SaaS, AI, ERP, and services firms that want dedicated offshore SDRs to book meetings without hiring locally
Cold Call Crew provides dedicated offshore teams from Pakistan for outbound pipeline, appointment setting, and related execution. The official homepage puts SDRs for cold calling and outbound first, then also offers chat/inbound, customer support, back office, and ecommerce support. Performance stats on the homepage include 14,050+ calls attempted and 281+ meetings booked. Named testimonials include Suite Solutions Group, Dispatchly AI, ScoreMachine AI, Flatfeecorp, Pantheon Global IT, Appelle Nous, and AMAK. A matching Google Place on coldcallcrew.com lists a Karachi address.

LeadHaste
★ 7.5Outbound infrastructure, Bulgaria delivery, tool-orchestrated campaigns
LeadHaste is a Sofia, Bulgaria B2B outbound growth partner founded in 2024 with 2 to 9 employees. The firm builds and manages complete outbound systems across deliverability, multi-channel campaigns, and 20+ integrated tools while giving clients full infrastructure ownership. GoodFirms lists $100-149/hr rates and a free pilot offer with compounding campaign optimization month over month.