This Apollo.io company profile covers the company's valuation, revenue, funding rounds, investors and history. Apollo.io works in software, with a focus on sales intelligence and engagement. It was founded in 2015 and is headquartered in San Francisco, California, United States. Its latest valuation on record is US$1.6 billion (August 2023). Every figure links to a public source, and anything the company hasn't disclosed is marked as such.
Revenue
| Metric | Value | As of | Source |
|---|---|---|---|
| Users | More than 3 million go-to-market professionals at more than 500,000 companies (company-reported) | August 2023 | Crunchbase News |
Funding history
| Date | Round | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| Aug 2023 | Series D | US$100M | US$1.6B | Bain Capital Ventures (lead); Sequoia Capital, Tribe Capital, Nexus Venture Partners | Crunchbase News |
| Mar 2022 | Series C | US$110M | About US$900M (reported) | Sequoia Capital (lead) | SiliconANGLE |
Apollo.io timeline
Key dates from the sources on this page, oldest first. Metric snapshots are listed after the funding events.
- 2015 — Apollo.io is founded in San Francisco by Tim Zheng (CEO) and co-founders.
- Mar 2022 — Series C: US$110M, valuing the company at About US$900M (reported). Investors: Sequoia Capital (lead).
- Aug 2023 — Series D: US$100M, valuing the company at US$1.6B. Investors: Bain Capital Ventures (lead); Sequoia Capital, Tribe Capital, Nexus Venture Partners.
- August 2023 — Users: More than 3 million go-to-market professionals at more than 500,000 companies (company-reported).
Investors
Overview
Apollo.io is a sales intelligence and engagement platform that combines a large database of business contacts and companies with tools to find prospects, enrich data, send outreach and manage pipeline. Users can search for decision-makers by role, company size, industry and technology used, find their contact details, and run sequences of emails and calls from the same platform. Its free and low-cost plans made it especially popular with startups, small businesses and individual salespeople. In August 2023 it raised a US$100 million Series D led by Bain Capital Ventures at a US$1.6 billion valuation, and said it served more than 3 million go-to-market professionals.
Tim Zheng, the CEO, co-founded Apollo with colleagues in 2015. The company went through Y Combinator, initially as a different product, before pivoting to sales intelligence. Apollo has grown largely through product-led growth: users sign up for free, find value quickly and upgrade or bring the product into their teams.
Products
- B2B database: searchable data on hundreds of millions of contacts and tens of millions of companies.
- Prospecting and enrichment: finding and enriching leads with emails, phone numbers and firmographic data.
- Sales engagement: email sequences, dialler and task management.
- Deal management: pipeline tracking and meeting tools.
- AI assistants: AI for research, personalised emails and workflow automation.
- Integrations: connections to Salesforce, HubSpot and other tools.
Funding
Apollo raised early funding through Y Combinator and from investors including Nexus Venture Partners and Tribe Capital. A US$110 million Series C in early 2022, led by Sequoia Capital, reportedly valued it at about US$900 million. In August 2023 it raised a US$100 million Series D led by Bain Capital Ventures, with Sequoia, Tribe and Nexus returning, at a US$1.6 billion valuation, bringing total funding to about US$250 million. The company said revenue had grown nine times over the previous two years. We haven't found a newer priced round, so the 2023 valuation is the latest we use.
Business model
Apollo uses a freemium model with paid tiers that unlock more data credits, features and integrations, priced per user. Larger customers buy team and enterprise plans. Its low entry price and self-service sign-up let it reach a very broad market, while upgrades and team expansion drive revenue growth. Data quality and coverage are key to retaining customers.
Competition
Apollo competes with ZoomInfo, the largest B2B data provider; with LinkedIn Sales Navigator; with data providers such as Lusha, Cognism and Seamless.AI; with data orchestration tools such as Clay; with intent and account platforms such as 6sense; and with sales engagement platforms such as Outreach. Its advantage is combining data and engagement in one affordable product.
Apollo.io at a glance
Apollo.io is a San Francisco sales intelligence and engagement platform founded in 2015 and led by CEO Tim Zheng. It combines a large B2B contact database with prospecting and outreach tools. It raised a US$100 million Series D in August 2023 led by Bain Capital Ventures at a US$1.6 billion valuation, serving more than 3 million users at the time.
Timeline
- 2015: founded; participates in Y Combinator.
- 2018–2020: grows through free and low-cost plans.
- 2022: raises US$110 million Series C led by Sequoia.
- August 2023: raises US$100 million at US$1.6 billion.
- 2024–2026: adds AI assistants and workflow automation.
Product-led growth in sales tools
Traditional sales data vendors sold annual contracts through sales teams, often at high prices that put them out of reach of small companies. Apollo let anyone sign up, search its database and send emails within minutes, with a free plan to start. That model attracted millions of users who later upgraded or introduced Apollo at their companies. Product-led growth can produce rapid adoption at low acquisition cost, but it also attracts many small, price-sensitive customers, so converting and retaining paying teams is critical.
Data accuracy and compliance
B2B contact data decays quickly as people change jobs, so providers must continually update records. Apollo combines contributed data, web sources and verification. Using contact data for outreach is subject to laws such as GDPR in Europe, CASL in Canada and CAN-SPAM in the US. Users are responsible for complying with these rules when contacting prospects, and vendors offer tools such as opt-out management to help. Our guide to building a B2B lead list covers best practices.
Who uses Apollo.io
Apollo's users include founders, sales development representatives, account executives, recruiters and marketers at startups, small businesses and larger companies.
Valuation context
Apollo's valuation nearly doubled between 2022 and 2023, unusual during a software downturn. Our guide to sales tech companies compares it with peers.
Risks
- Data quality: inaccurate data frustrates users.
- Competition: many data providers compete on price and coverage.
- Regulation: privacy laws affect contact data and outreach.
- Deliverability: email providers' anti-spam rules affect outbound tools.
Questions for buyers
- How accurate is data for your target markets and roles?
- How many data credits do your plans include?
- What tools help with compliance and email deliverability?
How sales teams use Apollo day to day
A typical sales development representative might start the day by searching Apollo for companies matching their ideal customer profile, such as software companies with 200 to 1,000 employees using a particular technology, then filter for heads of marketing or operations. They save the contacts, enrich them with verified email addresses, and add them to a sequence that sends a personalised first email, follows up a few days later and schedules a call task. Replies, meetings and opportunities sync to the CRM. Managers track which messages and segments generate the most meetings. Doing all of this in one tool, rather than combining a data provider, an engagement platform and spreadsheets, is the core of Apollo's appeal, especially for smaller teams without dedicated operations staff.
Latest developments (October 2026)
Apollo.io has not announced a new priced round since its August 2023 Series D at US$1.6 billion. Third-party estimates from Sacra put its annual recurring revenue at about US$265 million in September 2026, up from about US$194 million at the end of 2025; Apollo has not confirmed these figures. Secondary-market estimates in 2026 were below the 2023 round price. The company has leaned into AI agents for prospecting, competing with ZoomInfo, Clay and 6sense.
What to watch
Watch AI features, new funding, data partnerships and competition from Clay and ZoomInfo.
Takeaways
Sales teams can find and contact prospects in one affordable tool. Founders can see the power of product-led growth. Investors should note its last valuation is from 2023.
Sources
Every figure on this page comes from the public sources below. Where sources disagreed, we used the company's own announcement or a primary news report. Private-company data changes; check the date beside each figure.
Frequently asked questions
What does Apollo.io do?
Apollo.io is a software / sales intelligence and engagement company headquartered in San Francisco, California, United States. It was founded in 2015.
What is Apollo.io's valuation?
Apollo.io was valued at US$1.6 billion as of August 2023, according to SiliconANGLE. Private company valuations are set at funding rounds or share sales and can change significantly between them.
How much revenue does Apollo.io make?
Apollo.io is a private company and has not publicly disclosed its revenue. Figures on third-party sites are usually modelled estimates rather than numbers reported by the company.
What was Apollo.io's latest funding round?
The most recent financing we have verified is a series d in Aug 2023: US$100M, at a valuation of US$1.6B. Source: Crunchbase News.
Who are Apollo.io's investors?
Investors named in public announcements include Bain Capital Ventures, Sequoia Capital, Tribe Capital, Nexus Venture Partners and Y Combinator.
Who founded Apollo.io?
Apollo.io was founded in 2015 by Tim Zheng (CEO) and co-founders.
Is Apollo.io a public company?
No. Apollo.io is a private company (private, venture backed), so its shares are not traded on a stock exchange and it isn't required to publish its financial results.
Where is Apollo.io headquartered?
Apollo.io is headquartered in San Francisco, California, United States.