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Apollo.io vs Mailgun: 2026 Comparison

Apollo.io Mailgun
Overview Apollo.io is an all-in-one sales intelligence and engagement platform with a database of over 275 million contacts. It combines prospecting, enrichment, and outreach automation in a single workflow. A transactional email API service for developers with email sending, receiving, validation, and deliverability tools.
Pricing Freemium ($0-99/mo) Freemium (Free-$80/month)
Key Features
  • Contact database
  • email sequencing
  • dialer
  • LinkedIn integration
  • buying intent signals
  • data enrichment
  • CRM sync
  • lead scoring
  • Email API
  • SMTP
  • Email validation
  • Inbound routing
  • Analytics
  • Deliverability
  • Templates
  • Webhooks
Pros
  • Massive contact database
  • Generous free tier
  • All-in-one platform
  • Good data accuracy
  • Flexible API
  • Good validation
  • Inbound email processing
  • Reliable
Cons
  • Data can be outdated for smaller companies
  • UI can feel cluttered
  • Email deliverability issues at scale
  • Free plan very limited
  • Pricing can be confusing
  • Support varies
  • Interface basic