Apollo vs ZoomInfo

Apollo’s data page states a “98% email accuracy rate,” produced by a seven-step verification process. Apollo’s Help Center article “How Apollo Verifies Emails” states that Apollo verified emails “have an accuracy rate of 91%” and refers to a 9% bounce rate.

Buyer Eval does not conclude that either figure is false. The two numbers may use different definitions, samples, methodologies, or dates. Public information does not make the reconciliation clear enough for Buyer Eval to treat one as the universal accuracy figure.

Why it matters: an accuracy percentage is only useful to a buyer if it describes contacts like theirs. Neither page says which contacts, which time window, or how accuracy was validated, and ZoomInfo’s headline figures have the same gap. Buyers should test both datasets against their own ICP, using the method below.

Apollo publishes its plans: Free, Basic at $49, Professional at $79, and Organization at $119 per seat per month billed annually, with a three-seat minimum on Organization. Billed monthly, Basic is $65 and Professional $99; the page advertises 24% savings for annual billing.

Apollo now uses one credit pool, shared across the team, instead of separate email, mobile, and export credits. Each seat adds 30,000 credits a year on Basic, 48,000 on Professional, 72,000 on Organization, granted upfront on annual plans. An email costs 1 credit, a phone number 8, enrichment 1 to 8, and the US dialer 1 credit per 30 seconds. Credits expire at the end of each billing cycle and do not roll over.

For this scenario, 20 Professional seats billed annually list at $18,960 a year before add-ons (our arithmetic from the published price). What that buys depends on the mix: every mobile number an SDR reveals or every minute on the US dialer draws down the same pool.

ZoomInfo’s pricing page blocked our automated fetch, and ZoomInfo’s own 2026 pricing guide says paid plans are custom-quoted, annual, and that renewal pricing can rise from the initial rate. Its sales engagement product (sequences and dialer) is described as an add-on to base plans. So “Apollo is cheaper” may well be true for many teams, but it is not something public sources can settle for this one.

Apollo’s data page claims “240M+ global contacts” and, as covered above, gives an email-accuracy figure that differs from its Help Center’s. Apollo does refund the email credit if a verified email bounces within 30 days of the reveal.

ZoomInfo’s data page cites “500M+ verified professional profiles,” a “96% email deliverability rate,” and “87% mobile number accuracy”; lower on the same page, 96% and 87% appear as business-email and mobile “contact hit rates,” which measure coverage, not correctness. Its sales product page gives a different contact count (420M+). ZoomInfo describes a contributory network and human research, and its blog cites “up to 95% accuracy on first-party data.”

The independent evidence is thin. Every head-to-head test we found was run by someone with a stake. A data-enrichment vendor that competes with both reported higher mobile and email match rates for ZoomInfo on 1,000 mixed-geography leads. An email-verification vendor found Apollo lower on its own verifier’s bounce rate but higher on live-campaign bounces, on 450 leads each. A second email-verification vendor ran the largest test, about 16,600 contacts from each vendor matched by industry, company size, and seniority, and found 71.2% of ZoomInfo’s emails valid against 64.9% of Apollo’s (77.4% vs 70.1% at companies over 1,000 employees). It measured whether each mailbox exists, with its own verifier and without stating geography, not whether the address belongs to the right person. A former ZoomInfo customer found ZoomInfo ahead on deliverability and direct dials, on contacts it had originally sourced from ZoomInfo. G2 reviewers rate both highly, but Apollo’s reviewers are mostly small businesses, which makes the scores hard to apply to a mid-market and enterprise buyer.

Read together, this is evidence that results can differ by sample and method, and a weak signal that ZoomInfo may cover mobile numbers better and return more deliverable addresses. It is not evidence that either database is more accurate for this buyer’s ICP.

Apollo’s published plans bundle data with prospecting and execution: sequences on every paid tier, a US dialer that draws credits, intent topics (6 on Basic and Professional, 12 on Organization), CRM enrichment, and Salesforce integration. Apollo’s intent data is sourced from a third party (LeadSift) and described as “98% accurate,” with no methodology given.

ZoomInfo should be evaluated both as a data and intelligence platform and together with whatever engagement modules the buyer is considering, since its own pricing guide lists sales engagement as an add-on. A like-for-like comparison is Apollo’s plan against ZoomInfo’s data plan plus the modules that match Apollo’s execution features.

Database size is the least useful number here. The buying question is how many usable records, and how much outbound execution, each dollar buys for this team.