Background
Zacchary is a GTM and commercial operator who has helped over 100 firms expand across the UK, US, and EU, with a background in wholesale telecom and eSIM/MVNO platforms. He writes the DataFixr guides on prospecting data, enrichment economics, and outbound compliance.
- Commercial and go-to-market leadership at eSIM Go
- Wholesale telecom, eSIM, and MVNO platforms
- Helped over 100 firms expand across the UK, US, and EU
- University of Plymouth
What Zacchary Couldrick writes about
Zacchary Couldrick writes the DataFixr guides covering gtm + pmf, scale + expansion, wholesale telecom. They come out of that operating experience rather than from keyword research.
- Data Enrichment
- B2b Data Tools
- Sales Intelligence
- Alternatives
- B2b Data
- Abm
- Revenue Operations
- Apollo Alternative
Where a guide covers a regulated area such as TPS screening or lawful basis for outreach, it describes the operational process and points to the primary source. It is not legal advice.
Guides by Zacchary Couldrick
20 published guides.
Comparing B2B Data Tools by Layer: Sources, Search, and Data Operations
Apollo, Cognism, Lusha, and RocketReach each solve part of the B2B data problem, and not the same part. Sorting the market into layers - where records come from, and what makes them usable - makes a shortlist much easier to build.
B2B Data Enrichment Solutions, Services, and Workflows: How to Choose
B2B data enrichment solutions are not all the same. Some sell data, some clean records, some enrich CRM fields, and some help teams build complete prospecting workflows.
Apollo Alternatives: Prospecting Databases and the Data Operations Layer
Prospecting databases and data operations tools get compared as if they do the same job. They do not. Knowing whether you need a source of records or a workflow for making records usable makes an Apollo shortlist much shorter.
How to Build Prospect Lists in Europe
How to build better European B2B prospect lists using clear ICP rules, reliable sources, clean company and contact data, validation, suppression, and CRM-ready workflows.
Diagnosing a High Outbound Bounce Rate
Your bounce rate came back bad. Before re-verifying anything, read what the bounce types are actually telling you - list problem and sender problem look identical in the aggregate number.
Companies House Data for B2B Enrichment: What It Can and Cannot Do
Companies House data is a reliable public reference for UK company identity, but it covers a narrow slice of what B2B enrichment workflows need. Understanding where it helps and where it does not tells you how to use it properly.