Sub-processors

Version 1.0

Last updated: 18 May 2026

Next review: 18 August 2026

This page lists the third-party sub-processors I use to deliver services to clients under my Data Processing Agreement (DPA). Not every sub-processor is engaged on every project — the relevant set depends on the agreed Services and the tools the Data Controller already operates.

Change notification

I review this list quarterly and update it whenever sub-processors change. Existing clients will be notified by email at least 30 days before any new sub-processor is engaged or an existing one is replaced. Clients may object on reasonable data-protection grounds within 30 days of notification. If a reasonable objection cannot be resolved, the affected Services may be terminated without penalty (see §8 of the DPA).

To receive change notifications, email info@nathanoconnor.co.uk with the subject “Sub-processor notifications”.

International transfers

Where Personal Data is transferred outside the United Kingdom, transfers are governed by the applicable transfer mechanism in each sub-processor's own Data Processing Agreement, typically one of:

  • An Adequacy decision by the UK government (covers the EEA and a limited list of other countries)
  • The UK International Data Transfer Agreement (UK IDTA)
  • The European Commission's Standard Contractual Clauses (SCCs) with the UK Addendum issued by the ICO

Copies of the applicable transfer mechanism for any individual sub-processor are available on reasonable request.

Current sub-processors

Vendors are grouped by function. Headquarters and data location reflect the vendor's public disclosures at the time this page was last reviewed.

CRM and contact management

VendorFunctionHQ / Location
Twenty CRMCRM and contact managementEU / UK (self-hosted)
CallTrackingMetricsCall attribution (where deployed on client sites)United States

Ad platforms

VendorFunctionHQ / Location
Google AdsSearch, display, and conversion trackingUnited States (global infrastructure)
Meta AdsConversion tracking and audience matchingUnited States / Ireland
LinkedIn AdsB2B advertising and audience matchingUnited States / Ireland
Microsoft AdsSearch and conversion trackingUnited States
TikTok AdsConversion tracking and audience matchingUnited States / Ireland / Singapore

Analytics and tag management

VendorFunctionHQ / Location
Google Tag Manager (client and server-side)Tag orchestrationUnited States (global infrastructure)
Google Analytics 4Web analyticsUnited States
MatomoPrivacy-friendly analytics (consent-gated)EU / self-hosted

Consent management

VendorFunctionHQ / Location
CookieYesGoogle-certified Consent Management Platform; IAB TCF signallingUnited Kingdom

Automation

VendorFunctionHQ / Location
n8nWorkflow automationSelf-hosted / EU

AI tools

VendorFunctionHQ / Location
Anthropic (Claude API)AI content audits and analysisUnited States
PerplexityAI-assisted researchUnited States

Hosting and infrastructure

VendorFunctionHQ / Location
VercelSite hosting; also provides Vercel Analytics and Speed InsightsUnited States (EU edge regions available)
CloudflareEdge workers and CDNGlobal anycast network
NeonPostgres databaseEU (region-configurable)
ResendTransactional emailUnited States
SupabaseImage storage for blog hero imagesEU (region-configurable)

Contact

For questions about this list, sub-processor due diligence, or to request copies of underlying transfer mechanisms or vendor DPAs:

Nathan O'Connor
Email: info@nathanoconnor.co.uk