Clay vs Apollo vs ZoomInfo: B2B Data Stack Compared (2026)

Q: Does Clay replace Apollo and ZoomInfo?

Not as a database, no. Clay is a workflow tool that pulls data from Apollo, ZoomInfo, LinkedIn, Mailsfinder, and 100+ other providers. Many teams use Clay alongside Apollo or ZoomInfo to enrich the records they already pull, run AI-driven research, and push clean rows to their CRM or sequencer. If you cancel Apollo or ZoomInfo and only keep Clay, you still need to pay for the underlying data providers Clay calls. Clay is a great orchestration layer, but it is not a primary B2B database.

gavel OUR VERDICT

These three tools sit on different layers of the modern outbound stack, and treating them as direct substitutes is the most common mistake teams make when budgeting.

Clay is a data orchestration platform. It does not own a contact database. It aggregates 100+ providers (Apollo, ZoomInfo, LinkedIn, Mailsfinder, and many more) into table-style workflows with AI enrichment and waterfall logic. Pick Clay when your problem is workflow flexibility and you already have data providers to plug in.

Apollo.io is the all-in-one for SMB and mid-market teams. With 275M+ contacts, a sequencer, basic CRM, and intent signals bundled at $99 per user per month on Professional, it replaces three or four tools for a small revenue team. The trade-off is data freshness, which trails ZoomInfo in real-world tests, and per-seat pricing that scales fast.

ZoomInfo is the enterprise data standard. 95M+ verified contacts, mature Bombora-backed intent, org charts, and deep Salesforce integration. Pricing starts around $15,000 per year and lands at $30,000+ for typical teams. Pick ZoomInfo when data quality, intent, and Salesforce-grade integration matter more than budget flexibility.

If your primary need is finding and verifying B2B emails at scale, Mailsfinder gives you 300,000 credits for $9.99 per month or 2M credits one time for $249 lifetime. You can plug it into Clay as an enrichment step, replace Apollo's email-data layer, or augment ZoomInfo for budget-conscious teams.

100+

Data providers Clay orchestrates

275M+

Apollo contact database

95M+

ZoomInfo verified contacts

Feature-by-feature comparison

Fifteen rows covering the dimensions that actually matter for B2B outbound: data, workflow, pricing, integrations, and accuracy. Data points compiled from each vendor's public pricing, G2 reviews, Capterra ratings, and Reddit threads as of June 2026.

Feature	Clay	Apollo.io	ZoomInfo
Core strength	Workflow orchestration + AI enrichment	All-in-one database + sequencer	Enterprise data + intent signals
Owns a database	close Aggregates 100+ providers	check_circle 275M+ contacts	check_circle 95M+ verified
Starter price	$149/mo Starter (2,000 credits)	$59/user/mo Basic plan	$15K-30K/yr Demo only, annual
Pricing model	Credit-based (flat)	Per-user (seats)	Annual contract
Free plan	14-day trial	60 credits/mo, free forever	close No free tier
Self-serve signup	check_circle	check_circle	close Sales gated
Workflow builder	Best in class	Basic playbooks	Limited (Engage add-on)
Email sequencer	close Use Smartlead, Instantly	check_circle Built-in	check_circle Engage add-on
Intent data	Via providers (G2, Bombora)	Basic, on Pro+	Best in class (Bombora)
Org charts	Via providers	Partial	check_circle Best in class
AI enrichment	Native, prompt-based	Limited templates	Copilot add-on
CRM integration	HubSpot, Salesforce, Pipedrive	Native CRM + Salesforce, HubSpot sync	Deep Salesforce, HubSpot, Marketo
API access	Yes (HTTP nodes)	Yes (Pro+)	Yes (enterprise)
G2 rating	4.9/5 ~1,500 reviews	4.7/5 8,000+ reviews	4.5/5 7,500+ reviews
Best for	Growth and RevOps teams building custom data motions	SMB and mid-market SDR teams that want one tool	Enterprise revenue orgs that need verified data and intent

Pricing side by side

Three different pricing philosophies. Clay sells credits in flat tiers, Apollo charges per user per month with credit allowances, and ZoomInfo runs annual contracts negotiated through sales.

Plan tier	Clay	Apollo.io	ZoomInfo
Free	14-day trial	60 credits/mo	No free tier
Starter / Basic	$149/mo 2,000 credits	$59/user/mo Basic plan	Custom (annual)
Pro / Explorer	$349/mo 10,000 credits	$99/user/mo 12,000 credits + sequencer	~$15K/yr Sales Pro tier
Enterprise / Org	$800+/mo Up to $2,000+/mo	$149/user/mo Organization plan	~$30K+/yr + intent, +Engage
Cost predictability	High (flat credits)	Medium (per seat)	Low (negotiated)

Calculate your monthly cost

Estimate what each tool costs at your monthly enrichment volume. ZoomInfo is shown as a monthly equivalent of typical annual pricing.

Monthly enrichment volume

10,000

1K50K100K150K200K

Clay

$349/mo

Apollo.io

$99/mo

ZoomInfo

$1,250/mo

SAVE $14K/yr

Mailsfinder

$9.99/mo

Start saving with Mailsfinder

Strengths and trade-offs of each tool

workspaces

Clay

Strengths

check_circleBest-in-class workflow builder for table-style enrichment.
check_circleNative AI enrichment with prompt-based research columns.
check_circle100+ provider integrations including Mailsfinder, Apollo, ZoomInfo, LinkedIn.
check_circleWaterfall logic lets you fall back across providers per row.

Trade-offs

remove_circleNot a primary database, you still pay for the underlying providers.
remove_circleCost climbs fast at scale, with credit consumption per provider call.
remove_circleLearning curve for teams new to spreadsheet-style automation.
remove_circleNo built-in email sequencer, you bolt on Smartlead or Instantly.

rocket_launch

Apollo.io

Strengths

check_circle275M+ contacts, the largest self-serve B2B database available.
check_circleAll-in-one platform with sequencer, basic CRM, and dialer.
check_circleGenerous free tier and low entry price for solo prospectors.
check_circle4.7 G2 rating across 8,000+ reviews, with strong support marks.

Trade-offs

remove_circlePer-seat pricing scales fast once you add team members.
remove_circleEmail accuracy varies, with reported bounce rates of 25-80% in non-US lists.
remove_circleIntent data is shallow compared to ZoomInfo or 6sense.
remove_circleUI can feel cluttered for teams that only need email lookup.

domain

ZoomInfo

Strengths

check_circle95M+ verified contacts with the strongest data freshness in the category.
check_circleMature intent data backed by Bombora, scored against your ICP.
check_circleBest-in-class org charts and verified direct dials.
check_circleDeep Salesforce, HubSpot, and Marketo integrations for enterprise stacks.

Trade-offs

remove_circleAnnual contracts of $15K to $30K make it inaccessible for SMB teams.
remove_circleDemo-only signup with multi-week procurement cycles.
remove_circleModule-based pricing means intent, Engage, and Copilot are all add-ons.
remove_circleAuto-renewal clauses have generated frequent G2 complaints.

Which one should you pick?

Choose Clay if...

You run a growth or RevOps team that needs to combine multiple data providers, layer AI research on top, and ship reusable workflows. Clay shines when your motion is more complex than "find email then send." Use it to build account-scoring tables, signal-driven outbound, and lead routing pipelines.

Best for: Growth and RevOps engineers, technical SDR leaders, agencies serving multiple ICPs.

Choose Apollo.io if...

You want one tool that covers database, sequencer, and basic CRM at SMB-friendly pricing. Apollo is the safe default for small revenue teams that need to launch outbound this quarter without procuring three different tools. The free tier and self-serve checkout make it easy to test before you commit.

Best for: Founders, solo SDRs, small sales teams with 1 to 25 reps, growth-stage startups.

Choose ZoomInfo if...

You sell into mid-market or enterprise accounts where data freshness, verified direct dials, org charts, and intent signals determine pipeline conversion. ZoomInfo is the gold standard when budget allows and your stack runs on Salesforce. Procurement is slow, but the data depth justifies the spend for large revenue orgs.

Best for: Enterprise sales orgs, ABM teams, demand gen teams with intent budgets above $30K per year.

The data-layer alternative

Where Mailsfinder fits in this stack

Clay, Apollo, and ZoomInfo each treat email data as one feature inside a larger platform. If your real bottleneck is verified emails at scale, you are paying for sequencer, intent, CRM, and workflow features you may not need.

Mailsfinder focuses on one job: finding and verifying B2B emails at the lowest cost per record. You get 300,000 credits for $9.99 per month, or 2 million credits one time for $249 lifetime, with 100 free credits per day to test. No per-seat charges, no annual contracts, no module up-sells.

Three common patterns teams run with Mailsfinder:

linkPlug Mailsfinder into Clay as the email enrichment step, replacing Apollo or ZoomInfo credits per row.
linkReplace Apollo's email-data layer while keeping a sequencer like Smartlead or Instantly.
linkAugment ZoomInfo for budget-conscious teams that need extra verified emails without expanding the contract.

Metric	Clay	Apollo	ZoomInfo	Mailsfinder
Entry price	$149/mo	$59/user/mo	$15K/yr	$9.99/mo
Credits at entry	2,000	Varies	Custom	300,000
Lifetime option	No	No	No	$249 for 2M credits
Free tier	14-day trial	60/mo	None	100/day (3,000/mo)
Per-seat pricing	No	Yes	Yes	Never

alternate_email

Mailsfinder Lifetime

2M credits for $249 once

check_circle 99% verification accuracy
check_circle REST API for Clay, Make, Zapier
check_circle No per-seat pricing, ever
check_circle 100 free credits daily, no card needed

Try Mailsfinder free

Our evaluation methodology

We compiled this comparison from each vendor's public pricing pages, official documentation, G2 reviews, Capterra ratings, Reddit threads, and our own hands-on testing across all three platforms during May and June 2026. Where pricing varies by negotiation (ZoomInfo), we anchor on publicly reported contract values.

database

Data freshness

How often each tool refreshes its underlying contact set, and whether emails are verified at request time or pulled from cached records.

security

Verification accuracy

Cross-referenced against G2 reviews, Capterra ratings, and Reddit threads to gauge real-world bounce rates beyond vendor marketing claims.

paid

True cost per record

Calculated across all tiers, accounting for per-seat charges, credit consumption, verification overhead, and annual contract minimums.

build

Workflow fit

Whether the tool supports modern outbound stacks with native integrations into sequencers, CRMs, and reverse-ETL platforms.

Frequently asked questions

Which is better for outbound, Clay, Apollo, or ZoomInfo? expand_more

It depends on the job. Clay is a data orchestration layer that stitches 100+ providers (including Apollo and ZoomInfo) into custom enrichment workflows, so it sits above the others rather than competing on database size. Apollo.io is the most balanced all-in-one for SMB and mid-market teams, bundling a 275M-contact database with sequencer and basic CRM. ZoomInfo is the enterprise data standard, with 95M verified contacts, intent signals, and org charts, but it requires annual contracts of $15K to $30K and up. If you want flexible workflows pick Clay, if you want one-tool simplicity pick Apollo, if you have enterprise budget and need intent data pick ZoomInfo.

How much do Clay, Apollo, and ZoomInfo cost? expand_more

Clay starts at $149 per month for the Starter plan and scales to $2,000 or more per month for Enterprise. Apollo has a free plan (60 credits per month), a Basic plan at $59 per user per month, and a Professional plan at $99 per user per month with 12,000 credits and the sequencer. ZoomInfo is demo-only with annual contracts that typically land between $15,000 and $30,000 depending on seats, data modules, and intent access. Clay and Apollo are self-serve. ZoomInfo requires a sales conversation.

Does Clay replace Apollo and ZoomInfo? expand_more

Not as a database. Clay is a workflow tool that pulls data from Apollo, ZoomInfo, LinkedIn, Mailsfinder, and 100+ other providers. Many teams use Clay alongside Apollo or ZoomInfo to enrich the records they already pull, run AI-driven research, and push clean rows to their CRM or sequencer. If you cancel Apollo or ZoomInfo and only keep Clay, you still need to pay for the underlying data providers Clay calls. Clay is a great orchestration layer, but it is not a primary B2B database.

Which tool has the largest contact database? expand_more

Apollo.io advertises 275M+ contacts and 73M+ companies, which is the largest self-serve database in the comparison. ZoomInfo has 95M+ verified contacts but emphasizes data quality, real-time updates, org charts, and intent signals over raw record count. Clay does not have its own database, it aggregates results from providers like Apollo, ZoomInfo, and dozens of niche sources, so its effective coverage depends on which credits you buy.

Is ZoomInfo worth $15,000 to $30,000 per year? expand_more

For enterprise revenue teams that need verified direct dials, org charts, intent signals, and tight Salesforce or HubSpot integration, ZoomInfo is often worth the spend because of data freshness and account coverage. For SMB teams sending cold email at modest volumes, the cost rarely pencils out, and Apollo or a Clay plus Mailsfinder stack usually delivers similar pipeline at one tenth the price. Audit your actual usage before committing to a multi-year ZoomInfo contract.

Can I use Clay with Mailsfinder? expand_more

Yes. Mailsfinder is commonly used inside Clay as the email-discovery and verification provider. You feed Clay a list of LinkedIn URLs or first name, last name, and company, call the Mailsfinder enrichment step, and Clay returns verified emails with deliverability flags. This pattern lets teams keep Clay for orchestration while replacing the expensive Apollo or ZoomInfo email-data step with Mailsfinder credits at roughly one cent per record.

Which tool has the best email accuracy? expand_more

ZoomInfo has the strongest accuracy claims among native databases, with verification refreshed regularly across its 95M-contact set. Apollo bundles verification but real-world bounce rates vary widely. Reddit reports range from 25% to 80% on Apollo lists, especially in non-US markets. Clay accuracy is a function of which underlying providers you call. For pure verification, dedicated tools like Mailsfinder, ZeroBounce, or MillionVerifier typically outperform what is bundled inside Apollo or Clay workflows.

Which has better CRM and intent data? expand_more

ZoomInfo is the leader on intent data, with a mature Bombora-backed signal layer, account-level intent, and topic intent scored against your ICP. Apollo includes basic intent signals and native CRM connections to Salesforce, HubSpot, and Outreach. Clay can pull intent data from third-party providers but does not own a signal of its own. If intent is central to your motion, ZoomInfo is the safest bet, with Apollo a strong second for SMB budgets.

Is there a cheaper alternative to Apollo and ZoomInfo for email data? expand_more

If the goal is finding and verifying B2B emails at scale without paying for a CRM, sequencer, or intent module, Mailsfinder gives you 300,000 credits for $9.99 per month or 2,000,000 credits one time for $249 lifetime, plus 100 free credits per day. You can plug Mailsfinder into Clay as an enrichment step, replace Apollo's email-data layer, or augment ZoomInfo for budget-conscious teams that only need verified emails.

Clay vs Apollo vs ZoomInfo: the B2B data stack, compared

Feature-by-feature comparison

Pricing side by side

Calculate your monthly cost

Strengths and trade-offs of each tool

Clay

Strengths

Trade-offs

Apollo.io

Strengths

Trade-offs

ZoomInfo

Strengths

Trade-offs

Which one should you pick?

Choose Clay if...

Choose Apollo.io if...

Choose ZoomInfo if...

Where Mailsfinder fits in this stack

Mailsfinder Lifetime

Our evaluation methodology

Data freshness

Verification accuracy

True cost per record

Workflow fit

Related reading

Frequently asked questions

Need verified emails at one tenth the price?

More on B2B sales prospecting and data