Apollo.io is one of the most complete sales intelligence and engagement platforms available, combining a massive B2B contact database (275M+ contacts, 73M+ companies) with built-in email sequencing, dialer, and CRM enrichment. It gives sales teams the prospecting data and outreach tools they need in a single, affordable platform.
Product Overview
Apollo's database is its foundation: teams can filter contacts by job title, company size, technology stack, funding stage, location, seniority, and dozens of other attributes to build highly targeted prospect lists. Those lists flow directly into Apollo's sequencer for automated multi-channel outreach — or can be exported to HubSpot, Salesforce, or any other CRM. Apollo's intent data layer identifies companies actively researching relevant topics, surfacing warm prospects earlier in the buying journey.
Key Features
- Contact & Company Database: 275M+ contacts and 73M+ companies with verified emails, direct dials, LinkedIn profiles, and firmographic data.
- Advanced Filtering: 65+ filters: technology stack, funding stage, hiring activity, job change alerts, and more for laser-targeted prospecting.
- Sequences: Multi-step email and LinkedIn outreach sequences with A/B testing, task management, and reply detection.
- Intent Data: Identify accounts actively researching your category — prioritise outreach by buying signal strength.
- CRM Enrichment: Automatically enrich and update Salesforce and HubSpot contacts with Apollo data on a schedule.
Best For
SDR and BDR teams, growth-stage startups, and RevOps practitioners who want both a high-quality prospecting database and an engagement platform without paying separately for ZoomInfo and Outreach.
Pricing
Free plan (limited usage). Basic at $49/user/month; Professional at $99/user/month; Organisation at $149/user/month. Annual discounts available.
Key Integrations
Salesforce, HubSpot, Pipedrive, Outreach, Salesloft, LinkedIn Sales Navigator, Slack, Zapier, Gmail, Outlook
Pros
- Best value database + sequencer combo in the market
- Strong contact data quality and coverage
- Intent data adds a competitive prospecting edge
- Generous free plan for small teams
Cons
- Database quality can vary by geography and niche
- Sequencing less mature than Outreach or Salesloft
- UI can feel overwhelming with so many features
RevOps Jobs-to-Be-Done
- Outbound prospecting at scale — SDRs build targeted prospect lists from Apollo's 275M+ contact database, enrich them with verified emails and mobile numbers, and launch personalised multi-step sequences without leaving the platform. KPI: Reduce time-to-first-sequence from days to under an hour per campaign
- CRM data enrichment and hygiene — RevOps teams schedule automated enrichment jobs that backfill and refresh contact/account fields in Salesforce or HubSpot — job title, company size, funding stage, phone — as records go stale. KPI: Maintain CRM data accuracy above 85% without manual research
- ICP scoring and account prioritisation — Revenue teams apply Apollo's AI scoring to rank all accounts against their ideal customer profile, surfacing the highest-fit targets for ABM campaigns or territory planning. KPI: Increase pipeline-from-outbound conversion rate by focusing reps on scored accounts
- Buyer intent signal routing — Apollo's intent data (powered by Bombora and proprietary signals) alerts reps when target accounts show in-market behaviour, enabling timely outreach before competitors engage. KPI: Improve outbound reply rates by 2–3× on intent-triggered sequences vs. cold lists
How It Fits Your Stack
Primary system of record: Salesforce or HubSpot (Apollo syncs bi-directionally)
Key integrations: Salesforce, HubSpot, Outreach, Salesloft, LinkedIn Sales Navigator, Slack, Zapier
Data flows: Apollo reads your CRM to identify unenriched or stale records, pushes enriched data back, and can trigger sequences directly from CRM workflow rules. Contact and activity data flows back to the CRM after every touchpoint.
Security & Compliance
- SSO / SAML: Yes (SAML/SSO on Professional and above)
- RBAC / permissions: Yes
- Audit logs: Yes
- Certifications: SOC 2 Type II, GDPR, CCPA
- Data residency: US (EU data processing agreements available)
Implementation & Ownership
- Time to first value: Under 1 day — free account live immediately; CRM sync configured in hours
- Implementation complexity: Low
- Typical owners: Sales Ops, RevOps Admin, SDR Manager
The free tier allows immediate testing. Salesforce/HubSpot sync requires OAuth approval and field mapping — typically a 2–4 hour admin task. Sequence templates are available out of the box.
Proof & Buyer Signals
Ratings: 4.8/5 on G2 (7,000+ reviews, as of 2025) — one of the highest-rated tools in its category
What buyers praise:
- Database depth and accuracy for US contacts, especially direct dials and verified emails
- All-in-one value: replaces separate prospecting database, sequencing tool, and basic enrichment layer at a fraction of the combined cost
- Frequent product releases and responsive support team
Common complaints:
- International data (Europe, APAC) is patchier than US coverage — buyers in these regions often supplement with Cognism or Lusha
- At high sequence volume, deliverability requires additional domain warm-up care outside the platform
Often Compared With
- ZoomInfo — Choose ZoomInfo for deeper enterprise data coverage and org-chart intelligence; choose Apollo for better price-to-value, a built-in sequencing layer, and a generous free tier.
- Outreach — Choose Outreach for enterprise-grade sales execution, deal management, and forecasting; choose Apollo when you need prospecting data and sequencing in a single, more affordable tool.
- Clay — Choose Clay for highly custom, AI-enriched GTM workflows pulling from 50+ data sources; choose Apollo for a simpler, self-contained prospecting and sequencing workflow.
