Notice before subprocessors change in Transactional email and notifications
A list is a snapshot. Art. 28(2) GDPR gives you a right to object, and that needs advance notice.
8 of 31 companies we measured here publish it, that is 26%. Last checked 2026-10-18.
26% here against 10% across every category we measure. Transactional email and notifications sits above the overall share for this criterion.
This page counts companies, not product entries: a company with two products in this category is one company here and two rows below.
Back to Notice before subprocessors change across all categories, or to Transactional email and notifications.
- Found8
- Not found at checked addresses23
- Not measured2
33 companies in total. Unmeasured companies are excluded from the published share.
Published
The vendor commits publicly to giving notice before the list changes.
| Vendor | What we found |
|---|---|
| ClickSend | https://www.clicksend.com/en/legal/subprocessors/Checked |
| Knock | https://knock.app/legal/subprocessorsChecked |
| Mailosaur | https://mailosaur.com/legal/subprocessorsChecked |
| Mailtrap | https://mailtrap.io/dpa/Checked |
| OneSignal | https://onesignal.com/dpaChecked |
| Plunk | https://www.useplunk.com/dpaChecked |
| Pushwoosh | https://www.pushwoosh.com/sub-processors/Checked |
| Resend | https://resend.com/legal/dpaChecked |
No commitment to give notice before subprocessors change found.
We reached at least one address for each of these vendors and none of them carried it. That is what we found at the addresses we checked, on the date we checked them, and not a statement about what the vendor has.
| Vendor | What we found |
|---|---|
| Ably | 8 addresses checkedChecked |
| Batch | 8 addresses checkedChecked |
| Bento | 8 addresses checkedChecked |
| CometChat | 8 addresses checkedChecked |
| Copernica | 8 addresses checkedChecked |
| Courier | 8 addresses checkedChecked |
| Engagespot | 8 addresses checkedChecked |
| Ethereal | 8 addresses checkedChecked |
| Flowmailer | 8 addresses checkedChecked |
| Keila | 8 addresses checkedChecked |
| Listmonk | 8 addresses checkedChecked |
| MagicBell | 8 addresses checkedChecked |
| MailerSend | 8 addresses checkedChecked |
| Mautic | 8 addresses checkedChecked |
| Mission Inbox | 8 addresses checkedChecked |
| Novu | 8 addresses checkedChecked |
| Sendlayer | 8 addresses checkedChecked |
| Sendportal | 8 addresses checkedChecked |
| SMTP2GO | 8 addresses checkedChecked |
| SMTPeter | 8 addresses checkedChecked |
| SocketLabs | 8 addresses checkedChecked |
| Stream | 8 addresses checkedChecked |
| SuprSend | 8 addresses checkedChecked |
Not measured
We could not look at these, or their robots.txt asks us not to. That says something about our measurement, not about them, and they are left out of the percentage above.
Other criteria in Transactional email and notifications
- Data processing agreement
- Subprocessor list
- Data location stated
- Status page with history
- Public pricing
- Certifications named
- Uptime SLA with a figure
- HTTPS enforced with HSTS
- No third-party tracking before consent
- security.txt (RFC 9116)
- Named privacy contact
Notice before subprocessors change in related categories
Found something we missed? Tell us. A correction moves that vendor into our next nightly run. That run reads the same fixed addresses we check for every vendor, not the address you send.