At MediumAxis, we build structured, reliable datasets designed for professionals, marketers, and organizations who rely on accurate business intelligence.
This page explains how our data is collected, verified, and maintained — and the technology that powers it.
🌍 Data Sources
Our datasets are compiled from a wide range of reputable public, licensed, and commercial sources, ensuring maximum coverage and accuracy across global industries.
We source and standardize data from:
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Open and public business directories and structured datasets.
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Premium data providers including Apollo.io, ZoomInfo, Bureau van Dijk (Orbis), Crunchbase, Zacks Investment Research, Acxiom and some others.
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Professional networks such as LinkedIn and Xing, alongside specialized industry registries in sectors like medical, legal, manufacturing, automotive, and trade/export.
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Official company filings and government registries across multiple jurisdictions.
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Corporate websites and licensed private datasets, integrated into our unified schema for seamless compatibility.
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All raw input data undergoes internal aggregation, normalization, and standardization using proprietary schema models developed by MediumAxis to ensure consistency and interoperability across all datasets.
🔍 Verification & Quality Control
Every dataset passes through a multi-stage verification workflow inside our centralized PostgreSQL data warehouse.
Cross-Matching & Deduplication
Records are automatically compared against our latest verified datasets to eliminate duplicates and outdated entries.
Each contact or company record is assigned a unique internal ID to maintain dataset integrity.
Ongoing Data Refresh
Our internal systems perform continuous updates as new verified data becomes available.
Published, ready-to-use datasets are refreshed on a weekly basis, while internal data layers update automatically in real time with ongoing manual improvements.
Email Deliverability Validation
Email addresses are validated using SMTP-level checks and random verification passes, maintaining an active deliverability rate above 85% across all public datasets.
Multi-Field Validation
Phone numbers, company names, LinkedIn profiles, and addresses are verified against multiple sources to ensure consistency and data freshness.
Manual Review Passes
Internal analysts periodically perform manual quality assurance and field-level audits to catch anomalies, fill gaps, and enhance data accuracy before release.
⚙️ Data Storage & Computing Cluster
Our infrastructure runs on a dedicated distributed computing cluster optimized for high-performance data import, validation, and enrichment.
Cluster Overview
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Architecture: PostgreSQL-based distributed warehouse.
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Locations: Hosted on OVH servers (5 global data centers) and Hetzner servers (Frankfurt, Germany) for redundancy and performance.
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Node Roles: Each node handles specialized workloads — including data ingestion, cross-referencing, SMTP checks, compression, deduplication, and extraction operations.
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Backend Tools: Custom-built interfaces enable manual review, matching, enrichment, and validation of contact and company-level records.
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Performance & Data Lifecycle
Data is processed in parallel across nodes to achieve optimal throughput and stability.
Each dataset is versioned, timestamped, and archived, allowing for full traceability and rollback when necessary.
Redundancy mechanisms ensure business continuity and prevent data loss.
🔒 Transparency & Compliance
MediumAxis fully adheres to global privacy and data protection frameworks, including GDPR, CCPA, and CAN-SPAM.
All information originates from public, permission-based, or licensed commercial sources, and no personally sensitive or non-public data is ever collected or resold.
➡️ You can review our full compliance statement here:
GDPR & Legal Compliance
📈 Our Commitment
At MediumAxis, we believe that data quality drives business results.
By combining trusted sources, a rigorous verification pipeline, and robust infrastructure, we ensure that every dataset we publish is accurate, consistent, and ready for professional use.
Whether for lead generation, market research, or strategic analytics, our datasets deliver the precision and reliability that modern data-driven businesses depend on.
👉 Browse Our Products
Explore our live datasets and business contact lists:
➡️ Browse Products