Sales data
Guides to B2B data enrichment: finding and validating contact data, waterfall enrichment, and comparisons of Clay, ZoomInfo and other providers.
Updated October 2026 · 37 posts
Sales dataBuiltWith vs Amplemarket: Which Finds a Company's Tech Stack? (2026)
We looked up the same 20 websites in both. Amplemarket matches BuiltWith on coverage, but it has no detection dates and listed conflicting shop platforms for three of ten stores.
Sales dataThe Best Email Verification Tools, Tested on 100 Known Addresses (2026)
We ran the same 100 email addresses through 6 email verifiers. One half was real and the other fake. Every provider handled Gmail and dead domains. On work addresses, accuracy ranged from 97% down to 66%.
Sales dataWaterfall Enrichment in Claude Code with an MCP Server
Waterfall enrichment is how you get accurate, affordable B2B data. Which MCP servers run waterfalls, how to connect one to Claude Code, and how to change the provider order.
Sales dataClay Alternatives for Agencies (2026)
What an outbound agency needs from a Clay alternative: a cost per client you can invoice through, workflows you reuse across clients, and API or CLI access. Five options compared.
Sales dataClay Alternatives for AI-First GTM Teams
Most teams now want their own agents to run GTM, not a platform's built-in one. The two common ways to replace Clay, Clay clones and data-for-agents tools, both leave a gap. A third approach, and a directory of the tools in each camp.
Sales dataThe Best Tools for GTM Engineers (2026)
GTM engineers build the systems and experiments that scale a company's growth. Here are the tools they use for each layer of the stack: reasoning, data and automation, CRM, sending, sync, and research.
Sales dataWhy the First Provider in a Waterfall Decides Accuracy
A waterfall stops at the first answer, so the first provider decides accuracy. We checked cheapest-first routing against our provider benchmark: cheap answers often disagree with premium data, and cheap providers mostly find the same people.
Sales dataYour 20-Provider Waterfall Has Never Been Benchmarked
Vendors advertise waterfalls with 20+ providers for emails and phone numbers. In our benchmark, the best phone provider found 96% of numbers alone, and eight more providers added two. Long waterfalls ask the same few datasets the same question, over and over.
Sales dataZeroBounce vs. MillionVerifier: We Tested Both on 100 Known Addresses
We ran 50 real and 50 fake addresses through ZeroBounce and MillionVerifier. Both were perfect on Gmail and dead domains. On work addresses, one answered and the other said catch-all.