Apollo.io

Apollo.io is a sales engagement and B2B prospecting platform for outbound sales teams that want contact data, sequences and a dialer in one login.

Apollo.io finds the people an outbound sales team should be talking to, then runs the emails and calls that reach them and tracks the pipeline that follows, all under one login. It replaces the usual stack of a database from one vendor, a sequencer from another and a dialer from a third. The company that makes it, Apollo.io of San Francisco, was founded in 2015 and remains independent. It trades as ZenLeads Inc. doing business as Apollo.io. The platform is organized as data, intelligence and execution. The B2B contact database holds regularly refreshed emails, mobile numbers and direct dials. Lists are built with filters or from a CSV, a CRM or the API, then completed through Waterfall Enrichment and Job Change Enrichment. AI Research, AI Lead Scoring and Intent Topics rank the accounts worth working. Website Visitors and Real-time Form Enrichment feed inbound leads into the same lists. Sequences run multi-step outreach across email, calls and LinkedIn tasks, with templates that fill in dynamic variables at send time, open and click tracking, and A/Z Testing above the Basic tier. The Deliverability Suite adds Email Warmup, mailbox rotation and domain and mailbox purchasing. Meetings adds scheduling links tied to the rep's calendar. Reps work the day from the Task Execution Center and a unified inbox, dial from the built-in US dialer with automatic logging, and let AI Writing draft the copy. Call Recordings and AI Insights, Deal Management and Goals Setting and Tracking cover what happens after the reply. Apollo.io is built for sales development reps and account executives selling to other businesses. It also suits founders doing their own outreach and revenue operations teams that need Salesforce or HubSpot records kept current. It scales from a single seat on the free tier to sales organizations that want a dedicated GTM engineer and intent data across the account base. Sending runs from Gmail and Microsoft mailboxes on every tier, with SMTP mailboxes added on the upper ones. It is bought by the seat, with a free tier and three paid tiers, contact data metered in credits and two team add-ons. A rep's morning in Apollo.io starts with building a list, enriching it, enrolling it in a sequence and taking the calls it produces. It is also where a manager opens sequence reports by step and rep, pre-built analytics and call insights. It connects to Salesforce and HubSpot with bi-directional sync and runs inside Gmail, LinkedIn and Salesforce through the Chrome extension. An API serves custom pipelines, and MCP connects the platform to ChatGPT and Claude. Automated Workflows move records between those systems without a rep touching them, and Agents extend the same loop, with Projects following as a beta.