#Vendors and service providers
Last updated: November 9, 2026
Third parties that help Postra LLC run the Service. We will update this page when the list changes. Organization customers may object to new vendors that process Customer Content as described in the Data Processing Addendum.
Things we run ourselves (identity, mail transport and storage, search, categorization, abuse challenges, media proxying, and related pieces) are not listed here.
#Service providers (process data on our instructions)
| Provider | Purpose | Location |
|---|---|---|
| Onidel | Compute hosting for systems operated by Postra | Netherlands (Amsterdam), United States (New York), Singapore |
| Backblaze, Inc. | Object storage for mail and media (SoT) | EU Central, US West |
| Onidel Object Storage | Object storage for Asia home-region mail and media (SoT) | Singapore |
| Cloudflare, Inc. | DNS, CDN, and edge delivery | Global edge network |
| PostHog, Inc. (PostHog Cloud) | Product analytics, error tracking, and session replay (signed-in app, when allowed) | United States (PostHog US Cloud) |
#Independent providers (their own terms)
These parties usually process data under their own terms to provide their service (sign-in or payments). They are not Postra service providers in the same sense as the table above, but we list them because you may choose them or we use them for billing.
| Provider | Purpose | Location |
|---|---|---|
| Google LLC | Google Sign-In, where you choose that method | United States and other locations where Google processes authentication data |
| Apple Inc. | Apple Sign In, where you choose that method | United States and other locations where Apple processes authentication data |
| Stripe, Inc. | Payment processing and billing | United States and other locations where Stripe processes payments |
#Where processing happens
Postra is a US company. Infrastructure locations are in the tables above. If an Organization customer’s non-US privacy law requires a transfer tool for Customer Content, see the DPA Schedule 3 (signed packs on request).