Apollo.io
Apollo.io helps sales teams find, engage, and close deals using verified B2B contact data.
Apollo.io is an all-in-one sales intelligence and execution platform that combines verified B2B contact data (270M+ contacts), automated lead generation, and multi-touch engagement workflows in a single interface. It eliminates tool fragmentation by integrating with CRMs, email providers, and sales tools, reducing the 10+ tools most sales teams use. Apollo serves 500,000+ companies by enabling sales reps to spend more time selling and less time on data entry and repetitive tasks.
Problem solved
Sales teams waste 72% of their week on non-selling activities like data entry and tool management across an average of 10 different platforms.
Target customer
Sales-driven B2B SaaS companies, from mid-market to enterprise. Sales leaders, revenue teams, and GTM organizations at companies with 10+ sales reps.
Founders
T
Tim Zheng
Co-Founder & CEO
Engineer and former Founder/CEO of BrainGenie; MIT graduate. Founded Apollo.io in 2015 to democratize go-to-market capabilities.
R
Ray Li
Co-Founder & CTO
Chief Technology Officer overseeing product engineering and platform architecture.
R
Roy Chung
Co-Founder & CBO
Chief Business Officer leading business strategy and operations.
Funding history
Seed Round 1
$120K
March 2016
Led by Unknown
· Unknown
Seed Round 2
$2.2M
October 2016
Led by Unknown
· Unknown
Series A
$7M
June 2018
Led by Unknown
· Unknown
Series B
$32M
November 2021
Led by Tribe Capital
· NewView Capital, Nexus Venture Partners
Series C
$110M
March 2022
Led by Sequoia Capital
· Tribe Capital, Nexus Venture Partners
Series D
$100M
August 29, 2023
Led by Bain Capital Ventures
· Sequoia Capital, Tribe Capital, Nexus Venture Partners
Total raised:
$250M
Industries
Pricing
Freemium model with four tiers: Free, Basic ($49/user/month annual), Professional ($79/user/month annual), and Organization ($119/user/month annual). Monthly billing adds 15-25%. Credits expire monthly; overage credits cost $0.20 each (250-credit minimum). Actual costs often run 2-3x advertised price due to credit limits, tiered features, and add-ons.
Notable customers
Qualtrics, Customer.io, Census, Ernst & Young, Oracle, Lyft, Autodesk, Colliers, GoDaddy, Movate. Serves 500,000+ companies with 3M+ GTM professionals.
Integrations
Salesforce, HubSpot, Outreach, SalesLoft, Marketo, Sendgrid, LinkedIn, all major email providers, Google Workspace, Microsoft 365
Tech stack
React (JavaScript frameworks)
Next.js (Web servers)
Emotion (Development)
Lodash (JavaScript libraries)
core-js (JavaScript libraries)
MUI (UI frameworks)
Qualified (Live chat)
HubSpot Chat (Live chat)
Intercom (Live chat)
Webpack
Open Graph
LottieFiles
Module Federation
HubSpot Analytics (Analytics)
Matomo Analytics (Analytics)
Linkedin Insight Tag (Analytics)
Google Analytics (Analytics)
Facebook Pixel (Analytics)
Amplitude (Analytics)
HSTS (Security)
Node.js (Programming languages)
Apple iCloud Mail (Webmail)
Google Workspace (Email)
Netlify (PaaS)
Google Cloud CDN (CDN)
Cloudflare (CDN)
MailChimp (Marketing automation)
HubSpot (Marketing automation)
Google Tag Manager (Tag managers)
Google Cloud (IaaS)
Cookiebot (Cookie compliance)
Mailgun (Email)
Website
Competitors
ZoomInfo
Enterprise-focused with $14,995/year minimum pricing (~3x Apollo); broader data governance and compliance features but significantly more expensive.
Amplemarket
Focuses on AI-powered outreach with built-in workflows; lighter on data coverage but stronger on automation.
Agentforce Sales (Salesforce Sales Cloud)
Native Salesforce integration with enterprise feature set; best for organizations already invested in Salesforce ecosystem.
Seismic
Content-focused sales enablement platform; emphasizes sales content management over prospecting and contact data.
Why this matters: Apollo.io hit $150M ARR in June 2025 and became the first sales technology unicorn minted in 2023, with 9x ARR growth since 2021. Its product-led growth strategy (60% of funding invested in product) and focus on consolidating fragmented sales stacks positions it as a category leader reshaping how sales teams access data and execute workflows.
Best for: Mid-market to enterprise B2B SaaS companies and sales-driven organizations looking to consolidate multiple sales tools into one platform with verified contact data and automated workflows.
Use cases
Sales Prospecting at Scale
A B2B SaaS company with a 20-person sales team needs to identify 500 qualified leads in their target market weekly. Apollo provides access to 270M verified contacts, filters by company size/industry/technology, and eliminates hours of manual research that reps would otherwise spend on LinkedIn or ZoomInfo.
Automated Multi-Touch Campaigns
A sales leader wants to execute consistent, multi-channel outreach sequences across their team without relying on separate email, LinkedIn, and task management tools. Apollo's built-in email sequencing, task reminders, and workflow automation reduces setup time from days to minutes.
Contact Enrichment & CRM Sync
Sales reps manually copy-paste contact information into Salesforce, wasting 3+ hours per week. Apollo automatically enriches existing CRM records with verified phone numbers, decision-makers, and company insights, then syncs back to Salesforce in real-time.
Reducing Tool Sprawl
A sales ops team manages 10+ tools (Salesforce, HubSpot, Outreach, LinkedIn, email, task management). Apollo consolidates prospecting, enrichment, engagement, and task management into one platform, reducing tool redundancy and cost.
Alternatives
ZoomInfo
Use ZoomInfo for enterprise organizations requiring advanced data governance, compliance certifications, and don't mind 3x higher pricing.
Amplemarket
Use Amplemarket if your priority is AI-powered email personalization and outreach automation over breadth of contact data.
Salesforce Sales Cloud (Agentforce)
Use Salesforce Sales Cloud if you're building an enterprise Salesforce-centric stack and need native integration without third-party tools.
FAQ
What does Apollo.io do? +
Apollo.io is a sales intelligence and execution platform that combines verified B2B contact data (270M+ contacts), automated lead generation, email sequencing, and multi-touch campaign workflows in a single interface. It integrates with Salesforce, HubSpot, Outreach, and other sales tools, eliminating the need for reps to manage 10+ separate platforms.
How much does Apollo.io cost? +
Apollo.io offers four pricing tiers: Free, Basic ($49/user/month annual), Professional ($79/user/month annual), and Organization ($119/user/month annual). Monthly billing adds 15-25% to pricing. Credits expire monthly, and overage costs add up quickly. Actual spend often runs 2-3x the advertised rate for growing teams.
What are alternatives to Apollo.io? +
Top alternatives include ZoomInfo (enterprise-focused, 3x more expensive), Amplemarket (AI-powered outreach), Agentforce Sales/Salesforce Sales Cloud (enterprise Salesforce integration), and Seismic (content-focused sales enablement).
Who uses Apollo.io? +
Apollo serves 500,000+ companies and 3M+ GTM professionals, including Fortune 500 companies like Oracle, Lyft, Ernst & Young, and mid-market SaaS companies like Qualtrics, Customer.io, and Census. Primary users are sales teams, sales leaders, and revenue operations teams at B2B companies.
How does Apollo.io compare to ZoomInfo? +
Apollo is significantly cheaper at entry level ($49/user/month vs ZoomInfo's $14,995/year minimum), making it ideal for mid-market and growing companies. However, ZoomInfo offers stronger data governance, compliance certifications, and enterprise features. Apollo is often criticized for accuracy and deliverability issues that compound as teams scale.
Tags
sales intelligence
lead generation
contact database
email sequencing
sales automation
B2B prospecting
CRM integration