Data providers for GTM engineering

Prices checked on each vendor's site · Updated 17 October 2026

The data providers GTM engineers build with include Apollo.io, BetterContact, ContactOut, Dropcontact, Findymail, FullEnrich, Hunter, LeadMagic, Lusha, People Data Labs, Prospeo, Wiza, ZoomInfo, Clay, Coresignal, Exa, Instantly, Leadfeeder and TheirStack. Data providers supply the contacts, emails and phone numbers outbound runs on. No single provider covers every market, which is why GTM engineers combine several in a waterfall and judge them on match rate and cost per valid contact.

How do you choose the right data provider tool?

These are the criteria that matter most for data providers in a GTM engineering stack:

Coverage in your target countries and segments
Email and phone verification before you pay
Pricing model: credits, seats or per record
GDPR posture and data sourcing for EU and UK contacts
API and Clay availability

How do the 19 data providers compare on price and Clay fit?

Tool	Free plan	Starting price	Clay	Best for
Apollo.io	Yes	Basic: $49 per seat/month (annual) or $65 per seat/month (monthly)	native	Small teams and individual sellers who want contact data and a sequencer in one seat-priced tool, starting at $49 per seat per month billed annually.
BetterContact	No	Starter: $15/month	native	Teams that want one waterfall contract instead of separate accounts with a dozen email and phone vendors.
ContactOut	Yes	Email: $49/month (monthly) or $39/month ($468 billed annually)	native	Reaching people through personal email when work addresses bounce or are unknown, such as founders, recruits and job changers.
Dropcontact	No	Starter: From €79/month	native	European teams whose legal reviewers ask where contact data is stored, since Dropcontact says it stores no personal data and processes only on EU servers.
Findymail	Yes	Starter (credit-based): $99/month	native	Cold email teams where bounce rate is the constraint, given the under-5% bounce guarantee.
FullEnrich	No	Pro (monthly): From $29/mo	native	Teams that want waterfall enrichment through one API and one bill instead of contracting several providers directly.
Hunter	Yes	Starter: £41/month (monthly) or £28/month (£336 billed yearly)	native	Finding emails at small and mid-sized companies whose staff addresses appear on their own websites, since every result shows its public source.
LeadMagic	No	Essential: $99/month or $990/year ($83/month)	native	GTM engineers building waterfalls in code, n8n or Clay who want one credit pool and a 600 requests-per-minute email limit.
Lusha	Yes	Starter: $49.90/month (monthly) or $37.45/month ($449.10 billed annually)	native	Phone-first outbound teams that want mobile numbers at a fixed 5 credits each with self-serve monthly billing.
People Data Labs	Yes	Pro (Person data): Starting at $98/month	native	Engineering-led GTM teams building their own enrichment, scoring or product features on an API with documented rate limits and credit headers.
Prospeo	Yes	Starter: $49 per user/month (monthly) or $37 per user/month ($441/yr)	native	Teams that want a single email and mobile data source with simple credit maths: 1 credit per verified email, 10 per mobile.
Wiza	Yes	Starter: $49 per user/month	native	Reps and GTM engineers who build lists in LinkedIn Sales Navigator and want contact data for exactly those people.
ZoomInfo	No	See pricing	native	Sales and marketing organisations with budget for an annual contract that want contacts, intent and ABM advertising from one vendor.
Clay	Yes	Launch: From $167/mo (annual) or $185/mo (monthly)	native	GTM engineers building custom enrichment and qualification workflows that combine several data providers in one table.
Coresignal	Yes	Mini: $49/month	native	GTM engineers building their own account-scoring or signal models who want raw, structured records rather than a finished prospecting app.
Exa	Yes	API Starter: Free ($10 credits/month + $10 onboarding bonus)	native	ICPs that databases cannot filter, such as 'B2B SaaS companies hiring their first RevOps lead' or 'agencies that publish case studies about Clay'.
Instantly	No	Outreach: Growth: $47/month, or $37.6/month billed annually	native	Teams sending email-only campaigns across many inboxes, since every outreach plan includes unlimited email accounts and warm-up.
Leadfeeder	Yes	Discover: From €79/month annual or €113 monthly	native	UK and European teams who want visitor identification from an EU-hosted vendor that stays at company level by default.
TheirStack	No	App: 1,000 company credits: $109	native	Teams whose best buying signal is a job post, for example selling to companies hiring for a role your product supports.