Apollo.io
Headquarters
San Francisco, CAFounded
2015CEO / Founder
Tim ZhengEmployees
501-1000Funding
Series D+ — $251MProducts
1 product listedAvg. AI Score
8.1/10Website
apollo.io/
Profile updated
About Apollo.io
Apollo.io is a B2B sales intelligence and engagement platform founded in 2015 by Tim Zheng, Ray Li, and Dorian Ciavarella, and headquartered in San Francisco, California. The company provides software that combines a large contact and company database with outreach and workflow automation tools aimed at sales and go-to-market teams.
Apollo.io's core product includes a database of over 275 million contacts and 73 million companies, along with tools for email sequencing, dialing, LinkedIn outreach, and CRM enrichment. The platform is used by sales development representatives, account executives, and revenue operations teams across companies ranging from small businesses to mid-market enterprises. Apollo competes with platforms such as ZoomInfo, Outreach, and Salesloft.
The company raised a $100 million Series D round in 2023, bringing its total funding to approximately $251 million. Investors include Sequoia Capital, Tribe Capital, and Nexus Venture Partners. Apollo.io has grown its user base substantially through a product-led growth model that includes a free tier, and the company has reported reaching profitability. As of the mid-2020s, Apollo employs several hundred people.
Specialties
Financials
Dated, source-cited figures. Estimates are marked.
Products by Apollo.io
All products by Apollo.io reviewed by our AI panel of experts.
How Our Review Panel Scores Apollo.io
Six independent reviewer personalities assessed Apollo.io's product on their own terms. They landed within 0.4 points of each other, an unusually strong consensus.
Averaged across 1 reviewed product in our catalog. Scores are out of 10.
Competitive Landscape
Who Apollo.io competes with, and how they differ.
ZoomInfo is the larger, enterprise-first contact-data incumbent with a broader database and native intent/signals data, but its pricing and multi-year contracts target much bigger deal sizes than Apollo's self-serve, credit-based model.
2 products reviewed on TopReviewed
Cognism focuses on GDPR/CCPA-compliant, phone-verified data for EMEA-heavy sales teams, positioning as the more compliance-first alternative to Apollo's larger but less regionally-verified global contact database.
1 product reviewed on TopReviewed
Seamless.AI competes directly on real-time contact search and email/phone verification, but lacks Apollo's built-in sequencing, dialer, and deal-management tools that make Apollo a full engagement platform rather than just a data source.
1 product reviewed on TopReviewed
Outreach is a sales engagement platform built around multichannel sequences and forecasting for enterprise revenue teams, but has no native contact database, so customers typically pair it with a separate data provider — the gap Apollo's all-in-one platform fills.
1 product reviewed on TopReviewed
Clay lets sales teams build custom enrichment workflows by waterfalling across dozens of data providers and AI research agents, appealing to technical teams who want a build-your-own alternative to Apollo's single integrated database.
1 product reviewed on TopReviewedCompany Timeline
Key milestones in Apollo.io's history, with sources.
- Acquisition
Acquired Pocus, an enterprise revenue-intelligence startup
Acquired Pocus, a Coatue-backed enterprise revenue-intelligence platform used by Asana, Canva, and Monday.com, adding buying-signal detection to Apollo's AI-native go-to-market platform.
thenextweb.com - Milestone
Matt Curl named CEO; Tim Zheng becomes Chairman
Matt Curl was appointed CEO of Apollo.io, with co-founder Tim Zheng transitioning to the role of Chairman.
thenextweb.com - Funding
Series D — $100M at $1.6B valuation led by Bain Capital Ventures
Raised a $100M Series D led by Bain Capital Ventures, with Sequoia Capital, Tribe Capital, and Nexus Venture Partners participating, valuing the company at $1.6B and making it one of the year's first sales-tech unicorns.
prnewswire.com - Funding
Series C — $110M led by Sequoia Capital
Raised a $110M Series C led by Sequoia Capital, with Tribe Capital, Nexus Venture Partners, and NewView Capital also participating.
news.crunchbase.com - Funding
Series B — $32M led by Tribe Capital
Raised a $32M Series B led by Tribe Capital, with NewView Capital and existing investor Nexus Venture Partners participating, bringing total funding to date to $41.3M.
prnewswire.com - Funding
Series A — $7M led by Nexus Venture Partners; rebrands to Apollo
Raised a $7M Series A led by Nexus Venture Partners, with Social Capital and Y Combinator participating, and rebranded from ZenProspect to Apollo the same day.
techcrunch.com - Milestone
Joined Y Combinator Winter 2016 batch
ZenProspect joined Y Combinator's Winter 2016 batch, ranking as the third-fastest-growing company in the cohort and reaching $1M in annual recurring revenue during the program.
techcrunch.com - Founded
Founded as ZenProspect in San Francisco
Tim Zheng, Ray Li, and Roy Chung founded the company as ZenProspect in San Francisco, building sales prospecting tools after Zheng's frustration with existing tools at a prior startup.
techcrunch.com
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