BuiltWith alternatives

B2B lead intelligence platform with a contact database of 250M+ contacts for list building and enrichment.

Prospect search and contact finder for B2B emails and phone numbers, with a Chrome extension for LinkedIn.

Email finder that returns verified work emails, with bulk and API access.

Web scraping and automation platform with thousands of ready-made scrapers (Actors), often used to pull lead and company data for agents.

Sales intelligence, lead generation and email outreach platform.

Visit Apollo.io ↗

Sales signal data: a signal database, REST API and MCP server with hundreds of company and contact signals for personalized outreach.

Waterfall enrichment; charges only for verified emails and mobiles.

Spreadsheet-style enrichment and AI research workspace with waterfall data providers, a Clay alternative.

B2B contact database sold in one-time credit packs, plus a done-for-you list-building service.

Email verification service with monthly credit plans and integrations.

Email list verification service with an API and a deliverability testing kit.

GTM data enrichment and workflow automation platform.

Email verification and finder.

AI sales prospecting platform with a contact database, sequences and a dialer.

B2B contact data for prospecting.

GTM data API across 40+ providers for AI agents.

Email and phone finder.

Company, employee and job-posting data delivered via APIs (including an agentic search API) and datasets.

Private company database with funding, growth signals and company search for account-based prospecting.

Real-time people, company and job data API with hiring, funding and company-event signals, built for AI agents and GTM tools.

B2B lead generation and enrichment platform with company and contact search engines.

Spreadsheet-style enrichment workspace that waterfalls 100+ data providers to find emails, phones and company data.

Contact enrichment focused on mobile numbers and verified emails, usable directly, via API or inside Clay and waterfall tools.

Bulk email verification and list cleaning with an API, catching bounces, disposable addresses and spam traps.

Inbound GTM platform with enrichment and routing.

GDPR-compliant B2B email finder.

Email verification for bulk lists and via API to cut bounces before outreach.

Bulk and API email verification to remove invalid, disposable and risky addresses before sending.

Email and phone finder plus verifier that charges only for valid results, with no seat fees.

Exports and cleans LinkedIn Sales Navigator lead lists and finds verified emails.

Web search API built for AI agents, with company and people search, page contents and asynchronous research runs.

B2B company and contact data for AI agents and GTM workflows, sold as pay-as-you-go credits.

Email finder, verifier and cold email sender for building and contacting B2B lead lists.

Verified B2B email and phone finder with prospecting signals and CRM enrichment; charges only for verified results.

Web scraping, crawling and search API that turns websites into clean data for AI agents and LLM apps.

GTM workflow builder for enrichment and research, priced by credits with no per-seat fees.

AI enrichment tables with waterfall providers and CRM sync, positioned as a lower-cost Clay alternative.

Waterfall enrichment across 20+ providers.

Email finder and B2B lead database with LinkedIn extension and email verification.

Email finder, verifier and outreach tools.

Email finder and verifier with catch-all verification, API access and no-code integrations.

Agentic AI prospecting platform for finding, enriching and engaging B2B leads.

B2B contact data via a LinkedIn extension.

Email verification platform (GDPR-compliant, SOC 2) for bulk lists and real-time API checks.

Agentic B2B data platform: natural-language prospect search, AI qualification and pay-per-verified email and phone enrichment.

B2B contact and company data with verified emails, direct dials and buyer intent signals.

B2B prospecting data with universal credits.

Enrichment API and app for work emails, mobile numbers and company data, billed per successful result.

AI lead-list builder from the Salesforge team. You describe your ideal customer in chat and it returns verified contacts.

Visit Leadsforge ↗

LinkedIn's prospecting tool: advanced lead and account search, lead lists, InMail and buyer signals.

LinkedIn search export and email finder, with an API for LinkedIn and company data.

B2B contact data with a permanent free plan.

Email list verification and deliverability testing from the MailerLite team.

Email list verification that connects to email platforms and cleans lists automatically every day.

Bulk email list verification.

Contact finder for emails and phone numbers with a browser extension and API.

Lookalike company and contact search: find accounts that resemble your best customers across an 85M+ company index.

AI agent that builds lead lists from your website and ICP, enriches contacts and runs email and LinkedIn campaigns.

Scrapers for Google Maps businesses and reviews plus website email and contact extraction, billed per record.

Web research and search APIs for AI agents, with structured outputs and citations.

B2B person and company data APIs for building enrichment into products and pipelines.

AI sales prospecting and enrichment platform.

Cloud automations that scrape and enrich lead lists and run LinkedIn outreach workflows.

Email verification service with pay-as-you-go and subscription credits.

Verified emails, phone numbers and firmographic data.

Low-cost bulk and real-time email verification with one-time or daily-renewing credits.

Profile and company enrichment API for turning emails and LinkedIn URLs into full profiles.

Contact lookup for emails and phone numbers.

B2B contact and account data with unlimited exports, enrichment and on-demand research.

LinkedIn email and phone finder with CSV enrichment, campaigns and an MCP server.

Google Maps lead extraction tool for exporting local businesses with contact details.

LinkedIn and Sales Navigator scraper with email and phone enrichment, priced by credits.

AI sales lead platform.

Contact finder for emails and phone numbers via web app, browser extension and API.

B2B email finder and enrichment for LinkedIn, Sales Navigator and company websites.

Email finder, verifier and drip campaigns.

Visit Snov.io ↗

Finds and enriches B2B contacts from LinkedIn and syncs them to your CRM, with buying signals.

Web search and extraction API built for AI agents and LLM apps.

GTM data platform for lead search, waterfall enrichment and AI lead scoring, with CRM sync.

Job-posting and technographic data for finding companies that are hiring for, or using, specific technologies, via app and API.

Email finder and verifier with domain search, bulk lookups and an API.

Email validation that resolves catch-all addresses, with pay-as-you-go and unlimited plans.

AI agents that research accounts and create personalized messages.

B2B contact database with verified emails.

Signal-based pipeline platform that tracks job changes, contact-level intent, website visits and other buying signals and turns them into prioritized outreach.

Email verification service with bulk list cleaning, a real-time API and three validation levels.

Email finder and verifier with unlimited team members, plus optional email sequences.

Technographic lookups and lead lists of websites using specific technologies, plus CRM enrichment.

Contact data platform for verified emails and mobile numbers, often used to export LinkedIn and Sales Navigator lists.

Contact data and sequencing platform for finding emails and phone numbers and running outreach in one place.

Email validation and deliverability tools.

Go-to-market data and intelligence platform.