Apollo vs ZoomInfo: Which Prospecting Extension Fits Your Team?

Apollo or ZoomInfo: which should you pick?

Choose by buying model first, data second. Apollo is built for reps who sign up, install the extension and start pulling contacts the same afternoon; ZoomInfo is built for companies that negotiate a contract and roll seats out to a whole sales org.

That difference shapes everything else. A founder doing outbound alone rarely needs ZoomInfo's depth, and an enterprise RevOps team rarely accepts Apollo's lighter admin controls. Most people searching this comparison sit in the middle: a team of five to fifty reps deciding whether ZoomInfo's price is worth it over Apollo's.

If you only need a way to reveal an email on a profile, start with our broader email finder extension picks; both tools are heavier than that job requires.

What do the Apollo and ZoomInfo Chrome extensions actually do?

Both extensions overlay contact and company data on pages you already browse, so you can save a lead without switching tabs. The difference is what happens after you click save.

Apollo on LinkedIn

A side panel on profile and search pages shows the person's title and company, and lets you reveal a work email or phone number, which spends credits from your plan. You can add the contact to a list or straight into a sequence.

Apollo in Gmail

Adds Apollo controls to the compose window so you can insert templates, track opens and enrol a recipient into a sequence from your inbox.

ZoomInfo on LinkedIn and company sites

Shows ZoomInfo's record for the person or the company you are viewing, including firmographics and, depending on your licence, org chart and intent data.

ZoomInfo in email and CRM

Surfaces the ZoomInfo profile of whoever you are emailing and can push records into Salesforce or other connected CRMs, subject to your admin's settings.

In practice, Apollo's extension is a front door to a full outbound platform: find, sequence, call, report. ZoomInfo's extension is a window into a data platform that your team probably pairs with a separate engagement tool or CRM workflow.

Our Apollo.io extension profile covers the extension on its own, including what it can read. For a wider look at tools that pull emails from LinkedIn pages, see LinkedIn email finder extensions.

How does Apollo vs ZoomInfo cost compare?

Apollo publishes its plans and lets you start free; ZoomInfo generally does not publish list prices and quotes each deal. That alone makes Apollo cheaper to evaluate, even before you compare totals.

Exact prices change often, so check Apollo's pricing page and request a quote from ZoomInfo rather than trusting any figure quoted in a comparison article, including old ones you find ranking today.

• Credits vs seats: Apollo meters email and phone reveals with credits per user. ZoomInfo contracts usually bundle seats with an allowance of exports or credits. Ask each vendor what counts as one credit, because phone numbers often cost more than emails.
• Contract length: Apollo lets you pay monthly on most tiers. ZoomInfo buyers frequently report annual terms and auto-renewal clauses, so diary the notice window the day you sign.
• Add-ons: ZoomInfo sells intent data, engagement and conversation tools as separate products. Apollo includes sequencing in its core plans, with higher tiers adding more automation and reporting.
• Hidden cost of bad data: a cheaper plan that bounces more emails costs sender reputation. Factor in a verification step either way.

Is Apollo's data as accurate as ZoomInfo's?

Neither vendor is accurate everywhere, and your market decides the winner. ZoomInfo has a long reputation for strong North American enterprise coverage; Apollo is often praised for breadth and value, with more variation outside large companies and core regions.

Public accuracy claims, including tests in articles that rank for this keyword, rarely match your list of target accounts. Run your own side-by-side on contacts you can already verify. This takes an afternoon and beats any review.

1. Export a sample of contacts from your CRM whose emails and direct dials you know are current, ideally split across your real target regions and company sizes.
2. Start an Apollo free account and request a ZoomInfo trial from their sales team; ask for the same modules you would buy.
3. Open each contact's LinkedIn profile, click the Apollo panel and the ZoomInfo extension in turn, and record what each returns in a sheet with columns found, email correct, phone correct, title current.
4. Count only exact matches as correct. A generic info@ address or a switchboard number is a miss for prospecting purposes.
5. Repeat for a handful of net-new accounts you have not contacted, then send a small, personalised batch from each list and compare bounce rates in your email tool.

Is Apollo AI better than ZoomInfo Copilot?

They solve different problems. Apollo's AI features sit inside its outreach workflow, drafting emails and helping build lists and sequences; ZoomInfo Copilot focuses on prioritising accounts and summarising signals from ZoomInfo's data for reps who already have a territory.

If your bottleneck is writing and sending enough relevant outbound, Apollo's approach is closer to the job. If reps have too many accounts and not enough idea which to call this week, ZoomInfo's account signals are the pitch. Both sets of features change quickly, and some are limited to higher tiers, so confirm availability on your plan during the trial.

One practical note: AI-drafted emails still need a human edit. Generic openers land in spam folders and damage the domain you send from, whichever platform wrote them. Pair any AI drafting with a small send volume and an open-tracking tool you trust, such as those in our email tracking extension roundup.

What permissions do the two extensions ask for?

Both need to read and change data on the sites where they draw their panels, which means LinkedIn, your webmail and your CRM at minimum. That is expected for this category, but you can narrow it.

Chrome shows the requested access when you click Add to Chrome, and again under the extension's details page. Our guide to extension permissions explains what each warning means in plain language. To limit either tool to the sites you actually prospect on:

1. Open chrome://extensions in the address bar.
2. Find Apollo.io or ZoomInfo and click Details.
3. Under Site access, choose On specific sites and add https://www.linkedin.com plus your webmail and CRM domains. Pick On click instead if you only prospect occasionally.
4. Turn off Allow in Incognito unless you have a reason to use it there.
5. Reload any open LinkedIn tabs so the new setting applies.

On managed Chromebooks and company laptops, your admin may force-install or block either extension through Chrome policy. If Site access is greyed out, the setting is controlled by your organisation.

How do you install and set up each extension?

Apollo installs in minutes from the Chrome Web Store with any account; ZoomInfo's extension only becomes useful once your company has provisioned you a seat.

Apollo

1. Search for Apollo.io in the Chrome Web Store, click Add to Chrome, then Add extension.
2. Click the puzzle-piece Extensions icon in the toolbar and the pin next to Apollo so the icon stays visible.
3. Click the Apollo icon and sign in, or create a free account with your work email.
4. Open any LinkedIn profile; the Apollo panel appears on the right. Use it to save the contact or reveal details.
5. Open Gmail and approve the Apollo connection when prompted if you want sequences and tracking in the compose window.

ZoomInfo

1. Ask your ZoomInfo admin to confirm your seat includes extension access.
2. Install the ZoomInfo extension from the Chrome Web Store link your admin shares, or search for it by name.
3. Pin it via the Extensions menu, click it and sign in with your ZoomInfo credentials or company single sign-on.
4. Visit a company website or a LinkedIn profile and open the ZoomInfo panel to confirm data loads.

Google's help page on installing and managing extensions covers removal and troubleshooting if either one fails to appear.

Who competes with Apollo and ZoomInfo, and what was the ZoomInfo lawsuit?

Apollo and ZoomInfo are each other's most-cited rival. Beyond that pair, the usual alternatives are Lusha, Cognism, Seamless.AI, RocketReach and Hunter, each with a Chrome extension of its own.

• Apollo's closest competitors: ZoomInfo at the top end, and Lusha, Seamless.AI and RocketReach for self-serve contact data. Our Apollo alternatives guide compares them by use case.
• ZoomInfo's closest competitors: Apollo on price, Cognism for European coverage and compliance focus, and Lusha for lighter teams. See ZoomInfo alternatives for the full list.
• If you only need one email: a platform is overkill. Our walkthrough on how to find someone's email address covers free methods first.

On the legal question: ZoomInfo faced US class actions, filed in 2021 in Illinois and Washington federal courts, alleging it used people's names and profile details in teaser profiles to promote subscriptions without consent, framed as right-of-publicity claims. In February 2024 it proposed settling them for up to about $29 million (see The Columbian's report). Check current court records for final status.

Apollo has its own history to weigh: in 2018 it told customers its contacts database had been exposed in a data breach, as TechCrunch reported. For both vendors, the privacy question you should ask is how a person can request removal from the database, because your prospects may ask you.

Which Chrome extensions do the same job as Apollo and ZoomInfo?

ZoomInfo has no Chrome Web Store listing we could verify, so it stays text-only in this guide. Apollo does, and four lighter contact finders are worth a trial next to it if a full platform is more than you need.

See each profile for permissions and pricing: Apollo.io, Hunter, Lusha ContactOut and RocketReach. How we pick and rate these is set out in our review methodology.