Hunter.io Subprocessors List (September 2026): Changes and History
Hunter.io names 33 subprocessors on its published list. Read from the vendor's own page and re-checked daily.
Last checked September 28, 2026
Official source ↗
Hunter.io subprocessors (September 2026)
| # | Subprocessor | Purpose | Location | Data |
|---|---|---|---|---|
| 1 | AC PM LLC (Postmark) | Transactional emailing | USA | Hunter Users' email addresses and names |
| 2 | Amazon Web Services, Inc | Cloud service provider | USA | Hunter Users' data |
| 3 | Calendly | Automating scheduling of appointments | Ireland | Hunter employee and Users' email addresses and names |
| 4 | ChartMogul | Analytics | Germany | Hunter Users' data |
| 5 | Cloudflare, Inc. | Content delivery network | USA | Hunter Users' data |
| 6 | Digital Ocean | Cloud service provider | USA | Hunter Users' email verification data |
| 7 | Elastic, Inc. (Close CRM) | Customer relationship management | USA | Hunter Users' data, when they have an account manager |
| 8 | Elastic NV | Cloud service provider | USA | Hunter Users' data |
| 9 | Functional Software, Inc. (Sentry) | Application performance monitoring | USA | Hunter Users' data |
| 10 | Gandi | Cloud service provider | France | Hunter Users' email verification data |
| 11 | GBD Consulting and Services Private limited company (MillionVerifier) | Email verification provider | Hungary | Hunter Users' email verification data |
| 12 | Google LLC (Gemini API) | AI-generated company enrichment content (Discover feature) | USA | Search filters and natural language queries |
| 13 | Google LLC (Google Cloud Platform) | Cloud service provider | USA | Hunter Users' data |
| 14 | Google LLC (Google Workspace) | Email, file storage, and collaboration tools | USA | Hunter Users' data |
| 15 | Grammarly, Inc. | Writing assistant | USA | Hunter Users' data |
| 16 | Hertza L.L.C (Zerobounce) | Email verification provider | USA | Hunter Users' email verification data |
| 17 | Intercom, Inc. | Customer support platform | USA | Hunter Users' data |
| 18 | Linear Orbit, Inc. | Projects management | USA | Hunter Users' data |
| 19 | Livestorm | Webinar participation | France | Hunter Users' and potential users data |
| 20 | Notion Labs, Inc. | Projects management and customer relationship management | USA | Hunter Users' data |
| 21 | OpenAI | API services | USA | Hunter users name, contact information, demographic information, or other information provided by the user in unstructured data. |
| 22 | OVH SAS | Cloud service provider | France | Hunter Users' email verification data |
| 23 | Peaberry Software, Inc. (Customer.io) | Emailing related to the product | USA | Hunter Users' data |
| 24 | PostHog | Product analytics, including insights, heatmaps, session recording and feature flags. | USA | Hunter Users' names, Hunter Users' and Visitors' location (country, region, city), product usage (page views, clicks, browsing behavior), browser and device information |
| 25 | ProfitWell | Merchant of Record services | UK, Ireland, USA | Hunter Users' data |
| 26 | Retool, Inc. | Customer support and customer relationship management | USA | Hunter Users' data |
| 27 | SatisMeter s.r.o | Customer feedback collection | Czech Republic | Hunter Users' names, emails, plans on Hunter, feedback |
| 28 | Slack Technologies, LLC | Internal communication platform | USA | Hunter Users' data |
| 29 | Talend, Inc. (Stitch) | Data analysis | USA | Hunter Users' data |
| 30 | Stripe, Inc. | Payment processing | USA | Hunter Users' emails, billing address, payment information, transactions, IP addresses |
| 31 | The Rocket Science Group LLC (Mailchimp) | Newsletter emailing | USA | Hunter newsletter subscribers email addresses, names |
| 32 | Twilio, Inc. | Phone verifications | USA | Hunter Users' phone numbers |
| 33 | Zapier, Inc. | Workflow automations | USA | Hunter Users' data |
Get an email when Hunter.io changes its subprocessors
ClauseTrail re-checks this list every day and tells you exactly who was added or removed — including when a vendor starts sending data to an AI provider. The first vendors are free.
AI and customer data at Hunter.io
What Hunter.io's own documents say, with the sentence each answer comes from.
- Trains AI models on customer data
-
No
“User data is processed only to provide the requested AI service and is not used to improve OpenAI's models.”
Privacy policy, hunter.io ↗ - Sends customer data to AI model providers
-
Yes: OpenAI
“Hunter integrates OpenAI's language models to provide the following features to Hunter Users:”
Privacy policy, hunter.io ↗ - How to opt out
-
Users can disable AI-powered features entirely in account settings and continue using all core Hunter Services without them.
“Disable AI-powered features (email writing assistance, Discover, and personalization) in account settings at any time.”
Privacy policy, hunter.io ↗ - How long AI features keep data
-
OpenAI may retain API data for up to 30 days for abuse and misuse monitoring before deletion.
“Per OpenAI's data retention policies, API data may be retained for up to 30 days for abuse and misuse monitoring purposes, after which it is deleted.”
Privacy policy, hunter.io ↗
Documents we track for Hunter.io
- Privacy policy
- checked September 28, 2026 hunter.io ↗
- Subprocessor list
- checked September 28, 2026 hunter.io ↗
- Terms of service
- checked September 28, 2026 hunter.io ↗
Change history
Tracking since September 28, 2026. No change has been published since; additions, removals and document changes will appear here as they're published.
Hunter.io subprocessors FAQ
- How many subprocessors does Hunter.io use?
- Hunter.io lists 33 subprocessors on its published list, including AC PM LLC (Postmark), Amazon Web Services, Inc, Calendly, ChartMogul, and Cloudflare, Inc. and 28 more.
- Where does Hunter.io process customer data?
- The subprocessors named by Hunter.io are located in USA, France, Ireland, Czech Republic, Germany, and Hungary and 1 other locations, as stated on its list.
- Does Hunter.io use customer data to train AI models?
- According to its privacy policy, Hunter.io does not use customer data to train AI models: “User data is processed only to provide the requested AI service and is not used to improve OpenAI's models.”
- Which AI model providers does Hunter.io send customer data to?
- OpenAI is named in Hunter.io's privacy policy: “Hunter integrates OpenAI's language models to provide the following features to Hunter Users:”
- When was Hunter.io's subprocessor list last checked?
- ClauseTrail last checked Hunter.io's subprocessor list on September 28, 2026. Lists are re-checked daily.
- How do I find out when Hunter.io adds or removes a subprocessor?
- ClauseTrail monitors Hunter.io's subprocessor list, DPA, privacy policy and terms and emails you the exact change — who was added or removed and what the page said before and after. The first vendors are free.