Buyer’s guide

4 Best Lead Generation & Data Enrichment Tools for Agencies

Agencies juggling many client accounts need automation that scales across workspaces without per-seat costs spiralling.

Tools that build, enrich and activate B2B lead lists — from sourcing contacts to launching outreach. We ranked the top picks suited to agencies on value, features and ease of adoption. Here’s how they stack up.

1. ★ Top Pick

   1. Clay

   ★★★★½4.7
   Data EnrichmentFree trial; paid from $149/moFree tier

   A spreadsheet-meets-automation tool that enriches B2B leads from 100+ data sources and uses AI to research and personalize at scale. A favourite of modern GTM teams.

   Why it fits agencies: 100+ enrichment sources in one.

   Try Clay →

2. 2. Smartlead

   ★★★★½4.6
   Cold Email InfrastructureFrom $39/mo

   Cold email infrastructure built for volume: unlimited mailboxes, automatic inbox rotation and warmup to protect deliverability at scale.

   Why it fits agencies: Unlimited email accounts.

   Try Smartlead →

3. 3. Lemlist

   ★★★★½4.5
   Email OutreachFrom $39/user/mo

   A cold outreach platform with personalization, multichannel sequences and a built-in lead database. Known for image/video personalization and deliverability tooling.

   Why it fits agencies: Strong personalization.

   Try Lemlist →

4. 4. PhantomBuster

   ★★★★4.2
   Growth Hacking & ScrapingFrom $69/moFree tier

   A library of ready-made automations ("phantoms") for scraping and acting on data from LinkedIn, Instagram and more — a staple of growth and lead-gen workflows.

   Why it fits agencies: Huge library of ready automations.

   Try PhantomBuster →

How to choose

For agencies, the right lead generation & data enrichment tool comes down to budget, technical depth and how much you need to scale. Our top pick, Clay, is the safest starting point for most teams.