Apollo.io
- Free: 10,000 email credits/mo; Basic from $49/mo
- Platforms: Web, Chrome Extension, API
- 275M+ verified contacts, 70M+ companies
- GTM AI Assistant - GA since March 2026
- Integrations: Salesforce, HubSpot, Pipedrive, Clay, Gong
What is Apollo.io and Why Do Salespeople Need It
Apollo.io is a comprehensive B2B platform for lead generation, email outreach, and sales automation, integrating a contact database, built-in dialer, AI assistant, and CRM integrations in a single interface. Founded in 2015 (initially named ZenProspect), it is now valued at $1.6 billion and serves over 600,000 companies.
Key Features of Apollo.io
- B2B Contact Database - 275M+ verified contacts and 70M+ companies with 65+ filters: position, technologies, hiring signals, company size, industry.
- GTM AI Assistant - available in General Availability since March 2026; accepts natural language tasks and initiates a full multi-step workflow from ICP search to follow-up without tool switching.
- Email Automation - multi-step sequences with A/B testing of subjects, AI-generated icebreaker lines, and real-time tracking of opens/clicks/replies.
- Built-In VoIP Dialer - calls from contact profile, Local Presence, auto-logging; on Professional and Organization plans - call recording and AI transcription with auto-task creation.
- Waterfall Enrichment - auto-filling emails and phones from third-party sources: +5% emails, +7% phones, reducing undelivered emails by 45% as reported by the company.
- Inbound Lead Management - identification of companies visiting the website, form enrichment, and instant lead routing; monitoring up to 100 domains on paid plans.
- AI Research Agent - collects account intelligence before a call (news, tech stack, hiring signals); according to Apollo, increases the number of booked meetings by 46%.
Pros and Cons
- All-in-one: database + outreach + dialer + CRM
- Real functionality in the free plan
- #1 on G2 in Best AI Software 2026
- Natural language GTM AI Assistant
- Fast onboarding - up to 1 hour to the first prospecting
- Waterfall Enrichment reduces bounce by 45%
- Credits expire, not transferable
- Data accuracy outside the USA - 60-73%
- Direct phones weaker than ZoomInfo
- Annual contracts with auto-renewal
- Basic plan support - no real-time
Apollo.io Pricing and Plans
The platform offers 5 plans - from Free to Enterprise. Credits do not carry over to the next period, and phone numbers cost ~8 credits compared to 1 for emails.
- 275M+ contacts
- 10,000 email credits/mo
- 5 mobile credits/mo
- 2 active sequences
- Gmail only
- 30,000 credits/year (upfront)
- Unlimited sequences
- HubSpot + Salesforce
- Opens and clicks tracking
- 14-day trial
- 10,000 credits/year
- AI-generated emails
- Dialer with call recording
- A/B testing
- Advanced analytics
- 15,000 credits/year
- 200 mobile credits/mo
- International dialer
- SSO + full API
- Minimum 3 users
Apollo.io vs Competitors: Comparison
ZoomInfo offers a deeper database (500M+ contacts, 120M+ direct numbers) and proprietary intent signals, however, the median cost is $32K/year, and engagement tools require separate purchases. Apollo wins on price and completeness of the stack in one subscription.
Outreach and Salesloft are leaders in the enterprise segment for sales engagement with more powerful sequencers and forecasting, but do not have their own contact database and are significantly more expensive. Most of their clients use Apollo as a data source in parallel.
LinkedIn Sales Navigator provides the most accurate professional identity data but lacks email addresses and does not support outreach automation. Most teams use it as a complement to Apollo via Chrome extension rather than a replacement. Clay outperforms Apollo in custom enrichment (100+ sources) but requires technical skills and lacks its own database - a typical combination: Apollo as a data source + Clay as the enricher.
Use Cases
Who Should Use Apollo.io
- SDRs and BDRs - complete stack for cold outreach and lead qualification in one interface.
- Startups and SMB (1-20 managers) - enterprise-level tools without six-digit ZoomInfo budgets.
- RevOps and Sales Leaders - centralized pipeline analytics, deal velocity, and team activity.
- GTM Teams - capture and enrich inbound leads with automatic routing through Website Visitors.
- Founders and Independent Consultants - free plan for hypothesis testing, scaling as you grow.
How to Get Started with Apollo.io
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1Create an Account - Sign up at apollo.io for free; no card needed. The free plan activates instantly.
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2Install Chrome Extension - It allows extracting contacts directly from LinkedIn profiles without switching tabs.
- 3Connect CRM and Email - Set up native integration with HubSpot or Salesforce; field mapping will take 15-30 minutes.
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4Create Your First List - Use filters by position, industry, and tech stack; launch a sequence with AI-icebreaker lines.
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5Activate GTM AI Assistant - Assign a natural language task (“find CTOs in fintech companies with 100-500 employees in the USA”) and run a full workflow in minutes.
Platforms and Integrations
Frequently Asked Questions About Apollo.io
Is Apollo.io free?
Yes - the free plan includes access to a database of 275M+ contacts, 10,000 email credits per month, and 2 active sequences without a card. A 14-day trial of the Basic plan is available to lift restrictions.
How is Apollo.io different from ZoomInfo?
ZoomInfo offers a wider database of direct phone numbers (120M+) and deeper coverage of the corporate segment, though the median cost is ~$32K/year without engagement tools. Apollo covers the entire sales cycle in one subscription from $0 and leads in price-performance ratio for teams of up to 50 people.
How does the credit system work?
Each email reveal costs 1 credit, a phone number ~8 credits. Unused credits do not roll over to the next period, so during active outreach, actual expenses may exceed the stated tariff price by 2-3 times.
How accurate is the contact data?
According to the company, the accuracy of emails in the USA reaches 91% with a monthly verification of 72M addresses. Outside the USA, the accuracy drops to 60-73%, and the bounce rate of 15-25% exceeds the industry standard of 5% - this should be taken into account when working with international markets.
Final Assessment
Apollo.io is one of the most mature all-in-one tools for B2B sales on the market: 624 G2 badges, a $1.6 billion valuation, and the status of the only sales analytics platform in the Best AI Software 2026 list speak for themselves. For teams needing a hyper-targeted database, outreach automation, and an AI assistant without ZoomInfo's multi-thousand contracts, it's a pragmatic choice with a low entry barrier.