Here's the trap. You line these three up as though they are three brands of the same thing, ask which is best value, and start comparing seat prices. Two of the three will not show you a price at all, and the comparison you are trying to make was never available.
They are three different shapes. Apollo is a database with sequencing and a dialer attached, on one bill. Clay owns no contact data at all and orchestrates providers you pay for separately. ZoomInfo sells coverage on an annual contract through a salesperson.
Picking between them is like choosing between a supermarket, a personal shopper and a wholesale account. Asking which is cheapest per item tells you almost nothing about which one solves your problem.
So this page starts with what each one replaces, then covers what can and cannot be known about their prices, and ends with which bottleneck each one is actually for.
What does each one actually replace?
Apollo replaces a database and a sequencer. That is its real proposition and the reason it is most teams' first purchase: one bill instead of three, with a free tier to start on. Its data quality is good rather than excellent, and the constraint that bites is not the seat price but the export credit allowance.
Clay replaces the research step, and nothing else. It is an orchestration surface that runs waterfall enrichment across dozens of providers, which means it can find things a single source cannot. It also means it does not send anything, and the providers underneath it are a separate cost. It is the most capable and the least self-explanatory product in the category, and if nobody on your team will spend a fortnight learning it, the credits expire unused.
ZoomInfo replaces a database at enterprise coverage and adds a procurement process. For a mid-market-and-up North American ICP its coverage is genuinely the best available. It is sold annually, it is not self-serve, and its renewal terms have generated more complaints than any other vendor in our directory.
Why can't you compare them on price?
Because on the day we read all three, only one of them could be priced by a buyer.
ZoomInfo publishes nothing. Its pricing page returned a bot challenge rather than a page, and even reached, ZoomInfo does not publish rates. Every ZoomInfo figure you find quoted in a roundup comes from somewhere other than ZoomInfo, which is worth remembering before you anchor a budget to one.
Apollo's prices are not in its page. They load after the fact, and the structured data left behind in the HTML contradicts itself, labelling two different figures as monthly. Our own directory has carried a seat price for Apollo that matches nothing on Apollo's own site, so we have marked it unverified rather than repeat it here.
Clay publishes $185 a month to start, self-serve, with a free tier, verified in August 2026.
What is the real constraint on Apollo?
Export credits, not seats. Apollo's own definition is that you consume an export credit whenever you take a contact outside Apollo, to a CSV, a CRM or an API. So the price of the seat tells you what it costs to look, and the credit allowance tells you what it costs to use.
Two details matter more than the headline. Mobile credits are a separate pool from ordinary credits, so a phone number does not come out of the same allowance as an email. And Apollo applies a record selection limit, which its own help centre illustrates bluntly: saving ten thousand leads means clicking to select twenty-five at a time, two thousand times.
That last detail is why the frequently repeated claim that Apollo's free tier allows large exports cannot be settled from Apollo's own pages. Unlimited-sounding language and a twenty-five-record selection limit coexist, and only one of them describes the experience.
Is ZoomInfo's retention really falling?
No, and this is worth correcting because the opposite is widely repeated. Reading the filings rather than the coverage: net revenue retention was 87 percent in the annual report filed February 2025, 90 percent in the one filed February 2026, and 89 percent in the quarterly filed August 2026.
The 89 percent figure is often presented as a drop from 90. The filing itself says 89 percent as of 30 June 2026 and 2025, which makes it flat year on year rather than falling. It is also a dollar-based measure against a starting cohort, not a count of customers who stayed.
Which one should you buy?
Answer the bottleneck question first and the tool follows.
- If your bottleneck is that you have no motion at all, buy Apollo. Data and sending on one bill, a free tier to test on, and no contract. Check the export credit allowance on the tier you are considering rather than the seat price, because that is the number that will stop you.
- If your bottleneck is list quality, and you have someone willing to spend two weeks learning a deep tool, buy Clay. It will find contacts a single source misses. Budget for the providers underneath it as well, because Clay orchestrates data it does not own.
- If your bottleneck is coverage of North American mid-market and enterprise accounts, and you have procurement, ZoomInfo is the best-covered database available. Read the renewal clause before you sign, and read our account of a ZoomInfo contract exit first.
- If your bottleneck is cost per contact, none of these three is the answer. The readable end of the category runs from about 15 cents to 83 cents for a contact with a verified email and a mobile number, and we set out the normalised arithmetic separately. Apollo cannot be placed on that scale because its price is unverifiable, and ZoomInfo because it publishes none.
The honest summary is that this is not a three-way comparison. It is one question about whether you need data, sending, or the research that happens before either, and once you have answered it there is usually only one candidate left on the list. If the answer was list quality, measure your current hit rate before buying anything: a waterfall is cheap on a hard list and expensive on an easy one.