ZoomInfo vs. Apollo
Apollo and ZoomInfo both give GTM teams B2B contact data, prospecting and outreach in one place. They differ in how deep the data goes, who the platform is built for, and how you pay. Here's how they compare on data, features, AI and pricing in 2026.
Last updated: October 2026
Best for: Apollo suits individual sellers and small teams that want low-cost, self-serve prospecting. ZoomInfo suits sales, marketing and RevOps teams that need one data foundation and AI agents across the whole GTM motion.
Data: ZoomInfo covers 500M contacts and 100M companies, verified by 300+ human researchers. Apollo lists 240M+ contacts and 30M+ companies.
Pricing: Apollo charges per seat. ZoomInfo's GTM.AI is free to start, with consumption credits you pay for as you use them.
AI: Apollo offers an AI assistant for sellers. ZoomInfo offers 50+ ready-made agents and Agent Teams that run multi-step plays.
Proof: More than half of the Fortune 500 use ZoomInfo.
Both platforms give GTM teams data and outreach in one place. They differ in how much of the go-to-market motion they cover, and how you pay.
An AI GTM platform that turns B2B intelligence into pipeline
500M contacts and 100M companies, plus intent, website visitor and buying signals
Agents and Agent Teams for prospecting, enrichment and account research, with 50+ ready-made agents
GTM Workspace for sellers, GTM Studio for marketers and RevOps, plus conversation intelligence
API and MCP access, with SOC 2 Type II and ISO/IEC 42001-certified AI governance
Start free on GTM.AI and pay with consumption credits
A sales intelligence and engagement platform built around the individual seller
240M+ contacts and 30M+ companies, sourced partly through a contributor network
Sequences, a dialer and an AI assistant in one workspace
Free plan, then per-seat plans
MCP server on all plans; REST API on Custom plans only
How the two platforms compare on price, data, engagement, AI and access.
Features |  |  |
|---|---|---|
Best for | Sales, marketing and RevOps teams that want data and AI agents on one platform, from a GTM engineer starting free on GTM.AI to full GTM teams | Individual sellers and small teams who want data and outbound engagement in one per-seat subscription |
Starting price | Free to start on GTM.AI, with no credit card needed | Free plan, then per-seat plans (Apollo pricing breakdown) |
How you pay | Consumption credits with no seat fees: data credits for records, AI credits for research and agent work, with a credit estimate before each play (GTM.AI pricing) | Per seat (Basic, Professional, Organization, Custom), with credits pooled across the team that don't roll over |
Contacts and companies | 500M contacts and 100M companies, including 135M+ verified phone numbers and 200M+ verified business emails | 240M+ contacts and 30M+ companies |
How data is verified | 300+ human researchers, with 1.5B+ data points processed daily | Verified through a contributor network of 2M+ people and email verification |
Intent and buying signals | Proprietary intent signals plus WebSights website visitor identification | Buyer signal data for targeting (G2 profile) |
Sales engagement and dialer | GTM Workspace brings prioritized accounts, buying signals and AI-drafted outreach into one seller interface; signals sync into engagement tools such as Salesloft | Sequences and a built-in dialer, with advanced dialing on higher plans |
Conversation intelligence | Conversation intelligence, backed by 14 patents, feeds call context into the GTM Context Graph | Call recording with AI transcripts and summaries |
AI agents | Agent Teams run full plays, from signal to outreach to CRM update, starting from 50+ ready-made agents | AI agents that research, build lists, draft outreach, and follow up |
API and MCP | API, MCP, and CLI through GTM.AI on the same consumption credits | MCP server on all plans; REST API on Custom plans |
Security & compliance | ISO/IEC 27001, 27701, 27017 and 42001 (AI governance), SOC 2 Type II, TRUSTe Responsible AI Certification, and TRUSTe GDPR and CCPA validations (Trust Center) | ISO 27001, SOC 2, GDPR, CCPA/CPRA, and EU-US DPF |
An all-in-one platform is only as good as the data it runs on. Every sequence, dial, and AI agent action starts with a contact record, so test both platforms on your own target accounts.
500M contacts and 100M companies, including 135M+ verified phone numbers and 200M+ verified business emails
Verified by 300+ human researchers, with up to 95% accuracy on first-party data
Machine learning models scan 28M site domains every day
In a Fortune 500 RFP analyzing 25M contacts, the customer concluded "no other competitor came even close"
240M+ contacts and 30M+ companies, according to Apollo
Sourced largely from a contributor network of 2M+ people who connect inboxes, calendars, and CRMs
Topped up with public web crawling and third-party providers
Scales well for high-volume SMB prospecting
Capterra reviewers flag inaccurate phone numbers, outdated contacts, and weaker "mobile numbers for EMEA"
Both platforms now ship AI agents. The difference is what the agents can see and how much of a play they can run.
Apollo's AI agents research accounts, build lists, write outreach, follow up, and book meetings, drawing directly on Apollo's own contact data. Apollo's own guidance is to start with agents on research and first-draft outreach, with humans approving before send. For a rep who wants faster outbound without stitching tools together, that is a genuine convenience.
ZoomInfo's agents run on the GTM Context Graph, so they reason across verified data, CRM history, intent, and conversation signals together. With Agent Teams in GTM Studio, a supervisor agent coordinates specialist agents through a full play, from spotting a signal to outreach and CRM updates, inside a Playbook that sets the goal, bounds, and approvals. Teams can start from 50+ ready-made agents or describe a play in plain English, see a credit estimate before each play runs, and use Agent Teams with no new SKU or contract.
In GTM Workspace, AI agents surface buying signals and draft outreach in context for each seller.
Execution is where Apollo makes its strongest case, so it is worth looking at closely.
Apollo includes multichannel sales engagement sequences and a built-in dialer, with power, parallel dialing, and international dialing available through an Advanced Dialer add-on. Calls can be recorded, with AI transcripts and summaries. Reviewers rate the bundle highly: a project manager on Capterra says you can "setup automations and sequences to do your outreach for you."
ZoomInfo connects execution to intelligence. GTM Workspace brings prioritized accounts, buying signals, and AI-drafted messaging into one seller interface, and signals sync into engagement tools such as Salesloft. ZoomInfo's conversation intelligence, backed by 14 patents, captures call context and feeds it back into the GTM Context Graph, so one conversation can inform account scoring, forecasting, and outreach across the team.
At Seismic, sellers using GTM Workspace became 54% more productive, saved 11.5 hours a week, and sourced 39% of pipeline from ZoomInfo signals.
An all-in-one platform still has to connect to the rest of your stack, and to your AI tools.
Apollo connects with Salesforce and HubSpot through two-way sync, and with Pipedrive for contacts and accounts. Its MCP server works with Claude, ChatGPT, and other AI tools on any plan, while REST API access is available on Custom plans. Apollo's Trust Center lists ISO 27001, SOC 2, GDPR, CCPA/CPRA, and EU-US DPF.
ZoomInfo delivers the same data and intelligence wherever you work: in GTM Workspace or GTM Studio, inside Salesforce, HubSpot, and other native integrations, or headless through GTM.AI with the API, MCP, and CLI. GTM.AI is free to start, and headless usage draws on the same consumption credits as the rest of the platform. ZoomInfo maintains ISO/IEC 27001, 27701, 27017 and 42001 certifications, SOC 2 Type II, the TRUSTe Responsible AI Certification, and TRUSTe GDPR and CCPA validations, published in its Trust Center.
Apollo prices by seat, so cost follows headcount. With ZoomInfo's GTM.AI, you start free and pay only for what your team uses, with no seat fees or contract to begin.
Start free. No credit card needed.
Data credits pay for data. Each one enriches or exports a single company, contact or intent record.
AI credits pay for AI work, like account research and Agent Team plays. Most actions use 1–20 credits, depending on depth.
Search, lookup and find similar are always free.
See the credit cost before an Agent Team runs a play.
For example:
Enriching 500 CRM leads uses 500 data credits.
Researching 50 target accounts uses about 500 AI credits, around $25.
One account research prompt uses about 9–12 AI credits.
Free plan with limited credits, then paid plans priced per user per month
Each seat adds a fixed monthly cost, whether or not that seat is fully used
Credits are pooled across the team and reset each billing cycle
For a full breakdown, see our Apollo pricing guide.
Apollo holds a 4.7 out of 5 rating from 9,843 reviews on G2 and 4.5 from 398 reviews on Capterra. Reviewers praise its ease of use, price, and the convenience of data and engagement in one place. The most common critiques are phone and contact accuracy and how quickly credits run down with heavy use. Read our full Apollo review for more detail.
ZoomInfo holds a 4.5 out of 5 rating from 12,960 reviews on G2. ZoomInfo was also named a Customers' Choice in the 2025 Gartner Peer Insights Voice of the Customer for ABM platforms, with a 4.7 rating and 88% willingness to recommend.
Sendoso cut inaccurate data 70%. monday.com launched ABM programs 4X faster. Here's what teams see when they run GTM on ZoomInfo.
70% less inaccurate data. 1,100+ hours saved. $4.9M+ pipeline in two quarters.
With other providers, we weren't able to get the quality and quantity of data that we needed.
CEO and Co-Founder, Sendoso
39% of active pipeline from ZoomInfo signals. 54% more productive. 11.5 hours saved per week.
It's bringing data together faster than anyone could. It's both a time savings and a quality improvement.
Chief Business Officer, Seismic
4X program scale. 4X faster launches. 22 sales teams across 5 regions.
We can see everything in one place. We can see that the data is correct, understand the signals, and finally optimize our campaigns.
Strategic Demand & Lead Generation
2x higher new customer conversion. 90% higher opportunity open rates. 25% higher customer engagement.
They've done really a great job working with us to get us what we need.
Sales Data Science Manager, Snowflake
Apollo's all-in-one is built around the seller: find a contact, sequence them, call them. ZoomInfo's all-in-one covers the whole go-to-market team on one data foundation, so sales, marketing, RevOps, and AI agents all work from the same verified accounts, contacts, and signals. That is why teams from fast-growing startups to more than half of the Fortune 500 run their go-to-market on ZoomInfo.
Start on GTM.AI for free and use consumption credits across data, enrichment, and AI agents. No per-seat bundle to outgrow, and you see a credit estimate before an Agent Team runs a play.
Agent Teams coordinate specialist AI agents that run whole GTM plays, from spotting a signal to outreach and CRM updates, on connected data and signals. Apollo's AI agents focus on research, drafting, and follow-up for reps.
Sellers work in GTM Workspace, marketers and RevOps in GTM Studio, and developers and AI agents headless through GTM.AI, all on 500M contacts and 100M companies verified by 300+ human researchers.
It depends on your team. Apollo is a good fit for individual sellers who want low-cost, self-serve prospecting. ZoomInfo is better for teams that need deeper, verified data and intent signals, plus AI agents that serve sales, marketing and RevOps on one platform. More than half of the Fortune 500 use ZoomInfo.
Apollo prices by seat, so cost grows as you add users. ZoomInfo's GTM.AI is free to start, and no credit card is needed. After that you pay only for what you use: data credits for records you enrich or export, and AI credits for research and agent work. There are no seat fees.
For teams that have outgrown seat-based prospecting, ZoomInfo is a strong option. It offers 500M contacts and 100M companies verified by 300+ researchers, plus intent data, conversation intelligence and 50+ AI agents. See our Apollo alternatives guide for more options.
ZoomInfo covers 500M contacts and 100M companies, verified by 300+ human researchers with up to 95% accuracy on first-party data. Apollo lists 240M+ contacts, sourced largely through its contributor network, and reviewers most often flag phone accuracy and outdated records. Test both on your own target accounts.
Yes. GTM.AI is free to start, with no credit card required, and includes API and MCP access.
Yes. GTM Workspace brings prioritized accounts, buying signals, and AI-drafted outreach into one seller interface, ZoomInfo signals sync into engagement tools such as Salesloft, and ZoomInfo's conversation intelligence captures call context from every conversation. Apollo's dialer and sequences are built into its own subscription, with advanced dialing as an add-on.
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