Apollo.io is worth it for startups and small sales teams that want contact data, email sequences and a dialer in one self-serve tool. It's rated 4.7/5 from 9,843 reviews on G2 and 4.5/5 from 398 reviews on Capterra, where users praise its ease of use and filters. The catch, according to those same reviewers, is data accuracy, especially for phone numbers and job titles.
We read through Apollo's G2 and Capterra reviews and organized what users say around the six questions buyers ask most. You'll also find a scorecard, a fit guide by team type and three real cost scenarios based on Apollo's published pricing.
What Is Apollo.io?
Apollo.io is a sales intelligence and engagement platform that puts B2B contact data, outreach sequences, a dialer, enrichment and basic deal management in one place. It says more than 600,000 companies use it, from founders to enterprise sales teams.
Apollo says its database covers 240M+ contacts and 30M+ companies with 98% email accuracy. The data comes from a contributor network of users who share their business contacts, third-party data providers and waterfall enrichment across 20+ partner sources. Apollo is ISO 27001 and SOC 2 certified and says it's GDPR compliant as both a data processor and controller.
The product has changed a lot in 2026. In March, Apollo launched an AI Assistant that lets reps research accounts, build lists, set up workflows and draft content from prompts. Later that month it acquired Pocus to add revenue intelligence as it moves upmarket. It also offers Apollo MCP, which brings its data and actions into Claude, ChatGPT and Perplexity on every plan. Its Advanced Dialer add-on covers international, parallel and power dialing for $119 per team per month.
Apollo Review Scorecard
We scored Apollo on the eight criteria that matter most when choosing sales intelligence tools. Each verdict is based on G2 and Capterra review themes, ratings and Apollo's own published product and pricing details.
Criterion | Verdict | What the evidence says |
Ease of use | Strong | The most cited pro on G2, and 4.5/5 for ease of use on Capterra |
Outreach workflow | Strong | Sequences, a dialer and a deliverability suite sit next to the data, and "time-saving" is a top G2 pro |
Pricing transparency | Strong | Every plan is public, and the Free plan includes 900 credits a year |
AI and MCP | Strong | AI Assistant and Apollo MCP are available on every plan, including Free |
Email data accuracy | Mixed | Apollo claims 98% email accuracy, yet inaccurate data is a top-five G2 con |
Phone data | Mixed | Phone numbers cost 8 credits, and reviewers report outdated numbers and front-desk lines |
Intent and signals | Basic | 1 to 12 intent topics by plan, and website visitor identification for 20 to 100 companies a month |
Customer support | Mixed | 4.2/5 on Capterra, its lowest sub-rating, with both praise and complaints on G2 |
Six Questions Buyers Ask About Apollo, Answered by Reviews
These are the questions that come up most when teams evaluate Apollo. Each answer pulls from real G2 and Capterra reviews, then shows how ZoomInfo handles the same job.
1. Is Apollo's Data Accurate Enough?
Short answer: For email-led outreach, mostly yes. For phone outreach and job titles, expect to verify.
Apollo claims 98% email accuracy and runs built-in email and phone verification. Even so, outdated and inaccurate data is one of the most common complaints on G2, and reviewers put the error rate in very different places.
"The worst part of Apollo.io is that 30% - 40% of the data is not correct or up to date," says Gilberto C., a product support technician on G2.
"Direct phone numbers can occasionally be outdated or land on corporate front desks," writes Zahrul Y., a founder on G2.
An account development manager on Capterra estimates that "between 5-10% of listed titles will be wrong" compared with LinkedIn.
Ellie A., a co-founder on Capterra, relies on Apollo as a main contact data source but says, "For high-value accounts, I would not use Apollo as the only source of truth."
How ZoomInfo compares: ZoomInfo's data foundation covers 500M contacts, 135M+ verified phone numbers, 120M+ direct-dial phone numbers and 200M+ verified business emails, with 300+ human researchers and up to 95% accuracy on first-party data.
Seismic's sales team swapped manual research for ZoomInfo's verified data and got hours back every week.
"That combination of our internal CRM data, external signals, and the AI chatbot that's given all that context has helped us craft very specific account- and persona-based messages."
2. Can Apollo Replace Your Outreach Stack?
Short answer: For most small teams, yes. It's the main reason people choose it.
Apollo pairs 65+ search filters with multi-step sequences for email, calls and tasks, a deliverability suite with email warmup and a Chrome extension for LinkedIn, Gmail and Salesforce. Free and Basic plans cap sending at one mailbox per user and 250 emails a day, while Professional and Organization allow unlimited sends and more mailboxes.
"Being able to find contacts, verify emails, and manage outreach in one system saves a lot of time and reduces the need for multiple tools," says Shasta W., a director of sales support on Capterra.
Aman S., a marketing manager on G2, adds that the platform "can feel dense at first" and that "some useful capabilities are also tied to higher plans."
For high-volume email, one G2 reviewer notes that native sending lacks advanced deliverability features such as inbox rotation, which many teams get from a dedicated sending tool.
How ZoomInfo compares: GTM Workspace gives sellers prioritized account feeds, AI-drafted outreach and deal intelligence in one place, built on deeper data. Compare more options in our guide to lead generation software.
3. Will Apollo Help You Find In-Market Accounts?
Short answer: It gives you a starting point, but signals are limited on lower plans.
Apollo offers 1 intent topic on Free, 6 on Basic and Professional and 12 on Organization, plus AI lead scoring from Professional up. Website visitor identification covers 20 to 100 companies a month, and the Inbound add-on raises that limit. The Pocus acquisition is meant to strengthen signals further.
Reviewers who use these features value speed more than depth. Anil P., a founder on G2, says Apollo's AI helps "identify high-intent accounts quickly."
How ZoomInfo compares: ZoomInfo combines proprietary buyer intent signals with website visitor identification, and its GTM Context Graph processes 1.5B+ data points daily to show why an account is moving.
4. Does Apollo Keep Your CRM Clean?
Short answer: It helps, but enriched records still need spot checks.
Paid plans include automated CRM enrichment, CSV enrichment and API enrichment, drawing on waterfall enrichment across 20+ partner sources. Each enriched record costs one to eight credits.
Ankita P., a business development executive on Capterra, says results sometimes included "outdated or duplicate contacts, which required a bit of extra cleanup."
Diego B., a marketing manager on G2, wants Apollo to keep "constantly verifying if the people are the ones shared."
How ZoomInfo compares: ZoomInfo's CRM data enrichment keeps Salesforce, HubSpot and Microsoft Dynamics records current through bidirectional sync.
5. Is Apollo's AI Actually Useful?
Short answer: Yes for speed, with a human check on anything customer-facing.
Like other AI sales prospecting tools, the AI Assistant handles research, list building, workflows and content from prompts. Apollo MCP brings the same actions into Claude, ChatGPT and Perplexity.
Shane K., a mid-market user on G2, says the AI "simplifies getting the reports I need and helps me build sequences."
rushikesh d., a technical product manager on G2, finds it useful for first drafts but says, "I wouldn't blindly trust AI-generated personalization."
How ZoomInfo compares: GTM.AI gives agents API and MCP access to ZoomInfo data, with CRM records, conversation intelligence and intent from the GTM Context Graph built in.
6. What's Apollo's Customer Support Like?
Short answer: It depends on your plan and how complex your issue is.
Customer service is Apollo's lowest Capterra sub-rating at 4.2/5. Mannu, a sales and partnership manager on G2, says support "has been responsive when needed," and Anil P. praises its "smooth onboarding guides."
Others report the opposite. One small-business reviewer on G2 says promised callbacks and a scheduled onboarding call never happened, and several reviewers say advanced issues take longer to resolve on self-serve plans.
Who Apollo Fits Best, by Team Type
Apollo's fit depends less on company size and more on how your team sells. Here's how it lines up for six common team types.
Team type | Apollo fit | Why |
Founders and solo sellers | Strong | The Free plan, self-serve setup and AI Assistant make it easy to start |
Small SDR teams running email outbound | Strong | Data and sequences in one tool, starting at $49 per seat per month |
RevOps teams keeping the CRM clean | Mixed | Automated enrichment helps, but reviewers still spot-check records |
Teams selling outside North America | Mixed | Reviewers say data reliability varies by region |
Enterprise GTM teams | Mixed | Apollo is moving upmarket, but intent and signals are still limited by plan |
Phone-heavy outbound teams | Weak | Phone numbers cost 8 credits each, and outdated numbers are a common complaint |
If your team sits in the mixed or weak rows, especially if your pipeline depends on cold calling, it's worth comparing Apollo with platforms built for deeper data and intelligence. ZoomInfo is one of them, and our list of Apollo alternatives covers the rest.
What Apollo Really Costs
Apollo's list prices are simple, but what you pay depends on how many credits your team uses. Here are the plans, then three examples of how the math works in practice.
Plan | Price (billed annually) | Credits per seat per year |
Free | $0 | 900, granted monthly |
Basic | $49 per seat per month | 30,000, granted upfront |
Professional | $79 per seat per month | 48,000, granted upfront |
Organization | $119 per seat per month, 3-seat minimum | 72,000, granted upfront |
Credits are spent per action: 1 per email, 8 per phone number, 1 to 8 per enriched record, 1 per AI research run and 1 per 30 seconds on the US dialer, according to Apollo's published pricing.
Scenario 1: A Solo Founder on the Free Plan
Cost: $0
Credits: 900 a year, granted as 75 a month
What that buys: about 75 emails a month, or about 9 phone numbers
Enough to test Apollo's data on your own market, but not enough to run steady outbound.
Scenario 2: Five SDRs Running Email Outbound on Basic
Cost: 5 seats × $49 × 12 months = $2,940 a year
Credits: 150,000 a year across the team
What that buys: up to 2,500 email reveals per rep per month
Sending limit: one mailbox and 250 emails a day per rep
This is where Apollo is at its best. Credits leave plenty of room for an email-led team, and sequences come included. The constraint is sending volume. If each rep needs more than one mailbox or more than 250 emails a day, the team needs Professional.
Scenario 3: Five Reps Calling on Professional
Cost: 5 seats × $79 × 12 months = $4,740 a year, plus $1,428 for the Advanced Dialer add-on
Credits: 240,000 a year across the team
What that buys: up to 500 phone numbers per rep per month, before any dialer minutes, which also use credits
This is where reviewers feel the squeeze. Nurudeen O., a business outreach analyst on Capterra, says credits "can get used up quickly, and with phone numbers costing around 8 credits each, it becomes limiting fast." rushikesh d. also suggests looking past the entry price: "I'd look at actual monthly usage."
For a full breakdown of plans and add-ons, see our Apollo pricing guide, or compare Apollo's dialer with other B2B sales dialers.
ZoomInfo works differently. Free to start with consumption credits based on usage, ZoomInfo lets teams try the platform before scaling up.
Apollo vs. ZoomInfo: Where Each One Wins
Apollo and ZoomInfo solve overlapping problems in different ways. Apollo is built to make data and outreach easy for small teams. ZoomInfo is an all-in-one AI GTM Platform that combines deeper data, an intelligence layer and execution tools for teams that need to know why accounts are ready to buy.
Where Apollo wins:
A Free plan and public prices, so anyone can start without a sales call
Ease of use, which reviewers praise more than anything else
Data, sequences and a dialer in one tool for small teams
A 4.7/5 G2 rating from nearly 10,000 reviews
Where ZoomInfo wins:
Data depth: 500M contacts, 100M companies, 135M+ verified phone numbers and 120M+ direct dials, verified by 300+ human researchers
Intelligence: the GTM Context Graph fuses CRM records, conversation intelligence and behavioral signals to explain why deals move or stall
Signals: proprietary intent and website visitor identification feeding the same intelligence layer
Execution: GTM Workspace for sellers, GTM Studio for marketing and RevOps, Chorus for conversation intelligence and GTM.AI for AI agents
For the full side-by-side, see the Apollo vs. ZoomInfo comparison.
Weighing other options? See how Apollo stacks up against Seamless.AI, Cognism, HubSpot, 6sense and Amplemarket.
The Bottom Line on Apollo
Apollo has earned its reviews. For founders and small teams running email-led outbound, it's one of the easiest ways to get data and sequences in one place, and the Free plan lowers the risk of trying it.
The limits show up as teams grow. Reviewers consistently flag data accuracy, phone numbers burn through credits and intent is capped by plan. If those limits sound familiar, see how ZoomInfo handles the same work on your own target accounts. Book a demo.
Frequently Asked Questions About Apollo.io
Is Apollo.io Legit?
Yes. Apollo is an established go-to-market platform that says more than 600,000 companies use it. It's rated 4.7/5 from 9,843 reviews on G2, appears in G2's 2026 Best Software Awards, including the Top 50 Sales Products and Top 50 AI Products lists, and is ISO 27001 and SOC 2 certified.
Is Apollo.io Free?
Apollo has a Free plan with 900 credits per seat per year, 2 sequences, basic filters and limited AI Assistant use. Paid plans start at $49 per seat per month, billed annually, and Basic and Professional both offer a 14-day trial.
Is Apollo's Data Accurate?
Apollo claims 98% email accuracy, and many users rate its data well. Inaccurate or outdated data is still one of the most common complaints on G2 and Capterra, especially for phone numbers and job titles, and reviewers say accuracy varies by region. Teams prospecting outside North America should test a sample against their own target accounts before committing.
How Many Credits Does Apollo Charge for a Phone Number?
A phone number costs 8 credits, compared with 1 credit for an email. Enriching a record costs 1 to 8 credits, and the US dialer uses 1 credit per 30 seconds.
Does Apollo Work With Claude and ChatGPT?
Yes. Apollo MCP connects Apollo data and actions to Claude, ChatGPT and Perplexity, and it's available on every plan, including Free. ZoomInfo offers API and MCP access through GTM.AI, with intent and CRM context from the GTM Context Graph.
Is Apollo GDPR Compliant?
Apollo says it's GDPR compliant as both a data processor and controller, and it holds ISO 27001 and SOC 2 certifications.
What's the Best Alternative to Apollo?
For teams that need deeper verified data, proprietary intent and an intelligence layer, ZoomInfo is a strong alternative. G2 users also commonly compare Apollo with Lusha and Seamless.