Zeffy

Finance & Accounting11 vendorsUpdated Nov 13, 2026zeffy.com Subprocessor list

Zeffy uses 11 subprocessors and infrastructure vendors, including AWS, Google Cloud and OpenAI, based on its public subprocessor list. Last checked Nov 13, 2026.

AI Stack · 2

Infrastructure · 9

AI Stack

Foundation Models

Anthropic

669 companies

Model processing within authorised workflows

OpenAI

823 companies

Model processing within authorised workflows

View their stack →

Infrastructure

Cloud & Networking

AWS

1307 companies

Cloud hosting and storage of the Platform, including the Controllers contact and supporter records, forms, form responses and campaign content

Google Cloud

1081 companies

Model processing within authorised workflows

Heroku

61 companies

Platform-as-a-service that hosts and runs Zeffys application

Databases

Snowflake

341 companies

Data warehouse storing Platform records used for the Controllers reporting and exports

Data Pipeline

dbt Labs

43 companies

Transformation of warehouse data

Hevo Data

10 companies

Ingestion and replication of Platform records into the warehouse

Developer Platform

Workflow automation

Workflow automation

Communications

SendGrid

362 companies

Delivery of emails the Controller sends to its own recipients through the Platform

Model labs reached through vendors 3

Zeffy does not list these model providers. Vendors on its list name them on their own subprocessor lists.

Changes

Checked Nov 13, 2026Source

This is the first saved copy of Zeffy’s subprocessor list. Added and removed vendors will show here after the next check.

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