Apollo

Apollo is an AI-powered sales engagement platform that combines a massive B2B contact database with AI sequencing and workflow automation in a single interface. It serves over 500,000 companies globally, helping sales and marketing teams automate prospecting and outreach at scale. The platform is open-source under the Apache-2.0 license and offers a browser extension for Chrome.

What Apollo does:

• •B2B Contact Database Access a database of over 265 million contacts and 60 million companies with verified emails, phone numbers, and social profiles for targeted prospecting.
• •AI-Powered Sequencing Build and automate multichannel outreach campaigns that combine email, phone calls, and LinkedIn touches based on lead behavior and engagement signals.
• •Workflow Automations Create no-code automations to identify, qualify, and route leads to your CRM, scaling what works across your entire team.
• •Data Enrichment Automatically cleanse and complete lead records with firmographic and technographic data as contacts move through your pipeline.
• •Deliverability Suite Tools for warming up email domains, A/B testing subject lines, and managing sender reputation to improve inbox placement rates.
• •CRM & Tool Integrations Native two-way sync with Salesforce, HubSpot, and other major CRMs, plus connections to Gmail, Outlook, and Slack.
• •MCP Support Connect Apollo to other tools via the Model Context Protocol for building custom, cross-platform sales automation workflows.
• •Mobile App Full-featured iOS and Android apps for managing sequences, viewing tasks, and contacting leads on the go.
• •API Access The Professional plan includes a REST API for programmatic data enrichment, allowing developers to integrate Apollo's database into custom applications.

Limitations:

• •Data accuracy averages around 65% — Email bounce rates of 15–25% are commonly reported. For a small business paying per contact or per export, bounced emails mean wasted spend and a damaged sender reputation.
• •Credits expire and do not roll over — Credits remaining at the end of your billing cycle are lost. A fair-use policy on email credits can throttle your access without a clear published threshold, so actual usable capacity is often less than advertised.
• •Real costs run 2–3x the sticker price — Per-seat pricing scales expensively, and once you factor in add-ons, extra export credits, and tier upgrades when you hit limits, documented user experiences show bills landing at 2–3x the advertised base rate.
• •LinkedIn automation is manual — Despite being a LinkedIn-connected platform, LinkedIn outreach tasks require manual execution inside Apollo. True automated LinkedIn sequencing is not available.
• •Export limited to 25 records at a time — You can only select and export 25 contacts per batch. For bulk outreach campaigns this creates significant repetitive manual work.

Pricing:

• •Free 900 credits per user per year (granted monthly), 5 AI chat interactions, 2 active sequences, and basic email sending.
• •Basic $49/user/month (billed annually) includes 30,000 annual credits, unlimited sequences, full deliverability suite, and CRM integrations.
• •Professional $79/user/month (billed annually) adds API access for data enrichment, advanced analytics, custom reporting, and team performance dashboards.