Apollo.io vs ZoomInfo
Side-by-side comparison of AI visibility scores, market position, and capabilities
B2B sales intelligence platform with 270M+ contacts; prospecting database plus automated email/LinkedIn sequences at competitive pricing competing with ZoomInfo for SMB and mid-market sales.
About
Apollo.io is an all-in-one sales intelligence and engagement platform providing B2B contact data, company information, and automated outreach sequences — enabling sales and marketing teams to find prospects, enrich leads with contact details, and execute multi-channel outreach campaigns from a single platform. Founded in 2015 by Tim Zheng and Ray Li in San Francisco, Apollo.io has raised over $250 million and serves over 160,000 companies — from individual SDRs to enterprise sales teams — who need accurate contact data and prospecting workflow tools at competitive pricing.\n\nApollo's database contains over 270 million B2B contacts with work emails, phone numbers, LinkedIn profiles, and technographic data about the companies they work at. The prospecting engine enables filtering by job title, company size, industry, technology stack, growth signals, and funding status to build highly targeted prospect lists. Apollo Sequences automates multi-step outreach (email, LinkedIn, phone) with AI-personalized messaging, tracking opens, clicks, and reply rates to optimize conversion.\n\nIn 2025, Apollo.io is one of the fastest-growing sales tech companies, competing with ZoomInfo (the enterprise incumbent), Outreach, Salesloft, and Clay for sales prospecting and engagement platform share. Apollo's competitive advantage is its aggressive pricing (significantly cheaper than ZoomInfo for similar contact data) and its all-in-one design that bundles data and engagement — where ZoomInfo data must be purchased separately from engagement tools. The 2025 strategy focuses on improving data accuracy and freshness (a key differentiator from competitors), launching Apollo AI for automated outreach personalization, and growing its enterprise customer segment with SSO, advanced admin controls, and CRM sync capabilities.
NASDAQ: ZI B2B sales intelligence with 300M+ professional profiles and intent data at ~$1.1B revenue; Chorus.ai conversation intelligence competing with LinkedIn Sales Navigator and Apollo for GTM platform market share.
About
ZoomInfo Technologies Inc. is a Vancouver, Washington-based B2B go-to-market intelligence platform — listed on NASDAQ (NASDAQ: ZI) — providing sales teams, marketing departments, and recruiters with one of the largest databases of business contact data (300+ million professional profiles, 100+ million company records), intent data (signals indicating which companies are researching products in your category), and integrated engagement tools (email sequencing, dialer, conversation intelligence via Chorus.ai) that enable B2B revenue teams to identify, prioritize, and engage prospects at scale. Founded in 2007 as DiscoverOrg, ZoomInfo generated approximately $1.1 billion in revenue in fiscal year 2024 (declining from the 2022 peak as the B2B SaaS market normalized) while maintaining its position as the most comprehensive B2B data platform for enterprise sales and marketing teams.
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