Best Data Enrichment Tools for GTM Engineers 2024
Ranked and reviewed with opinionated picks, pricing, and use-case guidance.
GTM engineering is a new role in 2024. The title barely exists in job postings yet, but the function is real: technical people building automated outbound and enrichment pipelines. The enrichment tool market in 2024 is dominated by a few established players and one breakout tool.
Clay is the emerging favorite for GTM engineers who want to build enrichment waterfalls. Apollo is the practical default for teams that need data plus outreach in one platform. Clearbit is still independent (pre-HubSpot acquisition) and offers the cleanest real-time API. ZoomInfo remains the enterprise standard. See also: Best Enrichment 2025 | Best Enrichment 2026
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#1: Clay [Full Review]
EnrichmentBest for: GTM engineers building enrichment waterfalls with full control
Clay is gaining traction in 2024 as the tool for building custom enrichment waterfalls. Chain 50+ data providers into a single workflow where each source fills gaps the previous one missed. The credit-based pricing means you pay per enrichment, not per seat, which keeps costs predictable as you scale. It's not yet mainstream, but early GTM engineers are building their entire data operations around it. The learning curve is real, and you'll spend a few days building your first waterfall, but the coverage beats any single database.
Pricing: $149-$800/month
#2: Apollo.io [Full Review]
All-in-OneBest for: GTM engineers wanting enrichment, prospecting, and sequences in one platform
Apollo's 220M+ contact database gives you solid coverage for North American and Western European contacts. The free tier includes 10,000 email credits per month, which is generous enough for most small teams to prove value. Paid plans at $39/user/month include unlimited lookups. The built-in sequencing means you go from enriched list to live campaign without switching tools. Email accuracy runs around 85% on verified contacts, lower than premium providers but good enough for most outbound motions.
Pricing: Free-$79/user/month
#3: Clearbit [Full Review]
CRM EnrichmentBest for: Teams needing real-time API-first company enrichment
Clearbit is still independent in 2024 and offers the cleanest real-time enrichment API on the market. Sub-200ms response times make it practical for product-led enrichment workflows where you need to enrich a visitor's company data while they're still on your site. Company data is particularly strong: industry, headcount, revenue range, tech stack. Contact-level depth is lighter than dedicated providers. For GTM engineers building real-time enrichment into their product or signup flow, Clearbit's API is the standard that others get measured against.
Pricing: Contact for pricing
#4: ZoomInfo [Full Review]
Enterprise DatabaseBest for: Teams with budget for the deepest single-source B2B database
ZoomInfo's database is the largest single source for B2B contacts in 2024. Annual contracts start around $12K and climb fast with add-ons. Data accuracy is measurably better than Apollo's on VP+ contacts, with email bounce rates consistently under 5%. The intent data and technographic layers add targeting dimensions that smaller providers don't offer. Most ZoomInfo customers still layer additional tools on top for coverage gaps, which says something about the limits of any single database.
Pricing: $12,000+/year
#5: People Data Labs
Raw APIBest for: GTM engineers who want raw data access through a clean API
PDL gives programmatic access to 1.5B+ person records via REST API. No UI, no workflow builder, no hand-holding. You query the API, get back JSON, and build whatever you want on top. Coverage is massive and pricing is transparent at $0.01-0.10 per record. Data quality is uneven since PDL aggregates from public sources, so email freshness varies. If you write Python and want raw materials instead of finished tools, PDL gives you the flexibility. Everyone else should use Clay or Apollo.
Pricing: Usage-based (starting at $0.01/record)
The Verdict
Clay is the emerging pick for GTM engineers who want control over enrichment in 2024. The waterfall model is powerful, letting you chain multiple data providers to fill gaps that no single database covers. The tool is still gaining adoption, so community templates and shared workflows are limited. Apollo is the pragmatic default for teams that want enrichment plus outbound in one platform without building workflows. ZoomInfo is the safe enterprise choice with the deepest database, though the $12K+ price tag limits access. Clearbit leads on real-time API quality for product-led enrichment.
| Use Case | Pick | Starting Price |
|---|---|---|
| Build your own waterfall | Clay | $149/mo |
| All-in-one on a budget | Apollo.io | $0 |
| Real-time API enrichment | Clearbit | Contact sales |
| Enterprise database | ZoomInfo | $12K/yr |
| Raw API access | People Data Labs | Usage-based |
Frequently Asked Questions
What's the best enrichment tool for new GTM engineers in 2024?
Start with Apollo. The free tier gives you 10,000 email credits per month, which is enough to prove the value of enrichment to your team. Move to Clay when you need multi-source waterfalls that chain three or more providers for better coverage. ZoomInfo when your company can afford the $12K+ annual contract and needs enterprise-grade data depth.
Is Clay worth it in 2024?
If you're technical and run enrichment daily, yes. The learning curve takes a few days to get past, but the payoff is custom waterfalls that beat any single database on coverage. Clay lets you chain Apollo, Clearbit, DropContact, and other providers so each one fills gaps the previous one missed. For teams without a GTM engineer or anyone comfortable building workflows, Apollo is simpler and covers 80% of the enrichment need without the complexity.
How much does data enrichment cost for a small GTM team in 2024?
Apollo's free tier handles most small teams doing under 10,000 enrichments per month. Clay starts at $149/month with credit-based pricing on top, so actual cost depends on how many enrichments you run. ZoomInfo starts at $12K+/year. For teams under 10 people doing fewer than 5,000 enrichments per month, Apollo's free plan is the most cost-effective starting point. Add Clay credits when you find specific segments where Apollo's data has gaps.
Source: State of GTM Engineering Report 2026 (n=228). Salary data combines survey responses from 228 GTM Engineers across 32 countries with analysis of 3,342 job postings.