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Apollo.io vs Sailthru: 2026 Comparison

Apollo.io Sailthru
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. Marigold-owned personalization and marketing automation platform for retail and media with predictive intelligence.
Pricing Freemium ($0-99/mo) Subscription (Custom)
Key Features
  • Contact database
  • email sequencing
  • dialer
  • LinkedIn integration
  • buying intent signals
  • data enrichment
  • CRM sync
  • lead scoring
  • Email marketing
  • Personalization
  • Predictive intelligence
  • Mobile push
  • SMS
  • Lifecycle optimization
Pros
  • Massive contact database
  • Generous free tier
  • All-in-one platform
  • Good data accuracy
  • Retail focus
  • Predictive analytics
  • Cross-channel
  • Personalization engine
Cons
  • Data can be outdated for smaller companies
  • UI can feel cluttered
  • Email deliverability issues at scale
  • Enterprise pricing
  • Complex setup
  • Retail focused