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Apollo.io

CRM & Sales

B2B sales intelligence and engagement platform

Founded 2015San Francisco, CA, USAfreemium · Free planFrom Free (limited credits); Basic $49/user/month annualVerified · Sep 2026
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About Apollo.io

Apollo.io is a sales intelligence and engagement platform with a database of over 275 million contacts, helping sales teams prospect, enrich data, and automate outbound sequences.

Editorial Assessment

Apollo.io is an all-in-one sales intelligence and engagement platform that combines a B2B contact and company database of over 275 million contacts with built-in email sequencing, dialer, LinkedIn integration, and CRM sync. Founded in 2015 by Tim Zheng, Ray Li, and Justin Lieu, Apollo has grown rapidly as a lower-cost alternative to the combination of ZoomInfo (for data) and Outreach or Salesloft (for engagement). The platform's unified model — where prospecting, sequencing, and tracking happen in one tool — reduces the tool sprawl common in B2B sales stacks. The Free plan provides unlimited email credits (with daily limits), basic sequencing, and access to the contact database — one of the most generous free tiers in sales software. The Basic plan ($49/user/month annual) unlocks higher email limits, phone numbers, and bulk operations. Professional ($79/user/month annual) adds advanced sequences, A/B testing, and power dialer. Organization ($119/user/month annual, minimum 5 users) adds custom roles, advanced analytics, and SSO. Apollo's data accuracy has improved significantly since 2022 with AI-assisted email verification, reducing bounce rates. The primary concern for enterprise sales teams is that Apollo's contact database, while large, is less accurate than ZoomInfo's for senior executive contacts and direct-dial phone numbers.

Strengths
  • 275M+ contact database with one of the most generous free tiers in B2B sales tools
  • All-in-one: database, email sequencing, dialer, and LinkedIn extension in one platform
  • AI-powered email verification reduces bounce rates significantly
  • Buying intent data integrated with contact lookup for prioritizing outreach
  • Native CRM sync with Salesforce and HubSpot — no middleware needed
  • Apollo AI for writing personalized email sequences from prospect context
  • Significantly lower cost than ZoomInfo + Outreach/Salesloft combo
Limitations
  • Data accuracy lags behind ZoomInfo for senior executive contacts and direct-dial numbers
  • Email sequencing capabilities less advanced than dedicated tools like Outreach or Salesloft
  • Contact data coverage weaker outside the US and Western Europe
  • Some users report aggressive data refresh cycles causing outdated contact sync
  • Organization plan requires a minimum of 5 users

Best For

SMB and mid-market sales teams that want prospecting and sequencing in a single affordable tool SDRs and BDRs building targeted prospect lists with email sequences Founders and solo salespeople who need B2B data without an enterprise budget Sales operations teams replacing multiple tools with a unified platform

Not Ideal For

Enterprise sales teams that need enterprise-grade data accuracy for senior executive contactsTeams requiring advanced sales engagement features (call recording analytics, deal intelligence)Organizations that need APAC or LATAM contact coverage as primary market

Key Features

275M+ B2B contact databaseEmail sequence automationLinkedIn Chrome extensionBuying intent data signalsNative Salesforce and HubSpot CRM syncAI email writingPower dialerA/B testing for email sequences

Who It's For

SDRs and BDRs at SMB and mid-market companiesFounders doing founder-led salesSales operations teamsAccount executives prospecting for new pipeline

Integrations

SalesforceHubSpotLinkedInOutreachSlackZapier

Platforms

web chrome-extension

Founders

  • Tim Zheng
  • Ray Li
  • Justin Lieu

Products & Tools

Apollo.io Sales Intelligence + EngagementSales Intelligence / Engagement
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B2B prospecting database and sales engagement platform combining contact data, email sequencing, dialer, and CRM sync.

freemium · Free planFrom Free; Basic $49/user/month annual; Professional $79; Organization $119
275M+ contactsEmail sequencesLinkedIn extensionDialerCRM sync

Sources & Verification

Last reviewed September 2026

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Tags

Sales IntelligenceProspectingB2B DataSales Engagement

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