Sub-processors — 2026-10-21 (archived)

Since 9 October 2026, System1 Models operates under the name Decision Models (decisionmodels.io). References to System1 Models and system1models.ai in this document mean Decision Models and decisionmodels.io; nothing else changes.

Last updated: 21 October 2026

This page is the current list referred to in Annex 3 of our Data Processing Agreement. Where the Annex 3 copy on the DPA page differs from this list, this page is the current list (DPA section 6.2). For providers processing API content under the DPA, we announce additions or replacements at least 30 days in advance by email and on this page; you may object as described in section 6.2 (the 6 Oct 2026 UpCloud addition is an exception, see change history). Account data processed for our own purposes is outside the DPA under section 1.2 and is covered by our Privacy Policy.

May process API content — tier scope below

Sub-processor	Service	Location of processing	Safeguard
Hetzner Online GmbH, Industriestr. 25, 91710 Gunzenhausen, Germany	Hosting of the websites (including the dashboard), API gateway, database and encrypted backups	EU (data centre in Helsinki, Finland)	Provider's standard Art. 28 GDPR agreement required before customer-data processing; ISO/IEC 27001-certified data centres
UpCloud Oy, Helsinki, Finland	GPU servers for model inference: our always-on inference capacity since 7 October 2026 for the EU tier and for Peer-to-Peer/Global base capacity, plus additional servers when EU capacity is busy (those only for the EU tier)	Finland (EU), data centre FI-HEL2 only	Art. 28 GDPR data processing terms in UpCloud's Terms of Service (effective 3 July 2026); EU data centres operated by UpCloud Oy without further sub-processors (per UpCloud's DPA); ISO/IEC 27001 (per provider)
Janusz Ciuruś, trading as BESTCONNECT CIURUŚ JANUSZ (brand: GPU Server Hub), Królówka, Poland, NIP 8681799622 (CEIDG). Data centre 4DataCenter Katowice, operated by Quicktel Sp. z o.o. (KRS 0000297311)	From 21 November 2026: dedicated bare-metal GPU servers (not shared with the provider's other customers), operated by us, for model inference: EU tier and Peer-to-Peer/Global base capacity, alongside UpCloud	Customer content on the servers: 4DataCenter Katowice, Poland (EU). The provider's order system and logs are on its own infrastructure in Poland. Transfers outside the EEA only on our documented instruction	Art. 28 GDPR data processing agreement: Annex 1 of the provider's B2B Service Terms v1.6 r2 (8 Oct 2026). Quicktel is the infrastructure subcontractor for colocation, power, cooling and physical security. It is a sub-processor only if it handles personal data on documented instruction, under an Art. 28(4) agreement. No certification is asserted for this site
Lium (lium.io), with independent third-party GPU providers	On-demand GPU inference for opted-in Peer-to-Peer keys when spare EU capacity is busy	worldwide (third-party GPU providers)	Transfers outside the EU/EEA happen only for keys you opted in; you are responsible for not sending personal data on such keys unless an adequate transfer basis applies for your use. The switch itself is not a transfer basis under Chapter V GDPR.

EU-tier requests always stay in the EU. Without worldwide opt-in, Peer-to-Peer requests also stay in the EU. Request and response content is not stored on any node; this applies to EU capacity and Peer-to-Peer overflow alike. UpCloud runs our always-on GPU server and, while EU capacity is busy, additional servers that are deleted when no longer needed; from 21 November 2026, dedicated GPU servers at GPU Server Hub in Katowice, Poland, will also run model inference (see the table above). All UpCloud servers are in data centre FI-HEL2 only, with encrypted disks and no request logs; request and response content is held in memory only for the duration of the request.

Account, billing and identity providers — no API content

The providers below may receive account, billing or sign-in data, but never API request content. Their roles depend on the service: some act as processors on our instructions; Stripe and Google act as independent controllers for their own payment or identity services. See the Privacy Policy for details.

Provider	Service	Location	Role
Stripe Payments Europe, Ltd., Dublin, Ireland	Payments, tax calculation and invoices	EU; transfers to Stripe, Inc. (USA) under the EU-U.S. Data Privacy Framework and Standard Contractual Clauses	Independent controller for payment processing; processor for invoicing
Scaleway SAS, 8 rue de la Ville-l'Évêque, 75008 Paris, France	Service emails (sign-in links, receipts and notices); planned, not in use at present	EU (Paris, France)	Processor, once enabled; its Art. 28 GDPR agreement is concluded before first use
Resend (Plus Five Five, Inc., San Francisco, USA)	Optional email sign-in links only; no Google sign-in data, billing emails or API content	Sending region Ireland; messages and delivery/account records stored in the USA	Account-data processor under its DPA; SCCs and EU-U.S. Data Privacy Framework
Google Ireland Limited, Dublin, Ireland	Google sign-in; verified email and stable account ID only	EU; transfers to Google LLC (USA) may occur under the EU-U.S. Data Privacy Framework	Independent controller for identity services

Peer-to-Peer tier — current status

The Peer-to-Peer tier first uses spare EU capacity, with lower priority than EU-tier requests. When that capacity is busy, Peer-to-Peer requests may use on-demand GPU capacity rented through Lium (lium.io). Independent third-party providers operate the GPU hardware in various countries, including outside the EU/EEA. Processing outside the EU happens only for API keys whose customer has explicitly enabled the "Allow worldwide processing" switch. Without that opt-in, Peer-to-Peer requests stay on EU capacity and may be queued or rejected with a retryable error when busy. EU-tier requests always stay in the EU and have priority. Existing customers keep EU-only processing unless they opt in for the individual key. Request and response content is not stored on any node (zero payload retention). The existing 30-day notice and objection process still applies to new content sub-processors. This list does not assert Lium certifications or signed Standard Contractual Clauses.

Change history

Date	Change
27 Sep 2026	First version
28 Sep 2026	Hetzner service scope and safeguard reference clarified; no provider added or removed
30 Sep 2026	Google sign-in and account-provider roles clarified; Hetzner data-centre location (Helsinki) and Scaleway status (not yet in use) stated; no provider added or removed
1 Oct 2026	Lium and independent third-party GPU providers added for opted-in Peer-to-Peer overflow; EU-only defaults, EU-tier priority, zero payload retention and transfer conditions clarified
2 Oct 2026	Resend added for optional email sign-in; US storage and transfer safeguards disclosed. API-content sub-processors, existing Google sign-in and billing paths unchanged.
6 Oct 2026	UpCloud Oy (Helsinki, data centre FI-HEL2) added as additional GPU capacity for EU-tier requests at peak load; EU-tier requests still stay in the EU. Added with effect from 6 Oct 2026 without the 30-day advance notice described above; existing customers were informed by email the same day. You may object in text form on reasonable data protection grounds until 5 Nov 2026; the rights in DPA section 6.2 otherwise apply, including termination with a refund of unused prepaid credit.
7 Oct 2026	UpCloud Oy (Helsinki, FI-HEL2), already listed since 6 Oct 2026, now hosts our always-on GPU for all tiers instead of DataCrunch Oy (Verda), which is being phased out in October 2026; no new sub-processor is added. EU-tier requests still stay in the EU; Peer-to-Peer requests without worldwide opt-in also stay in the EU.
9 Oct 2026	Verda (DataCrunch Oy) removed: the server was deleted on 9 October 2026 and Verda is no longer used for inference. Our always-on GPU inference capacity now runs at UpCloud (Helsinki, FI-HEL2), with opted-in Peer-to-Peer overflow via Lium as before. No new sub-processor is added.
21 Oct 2026	GPU Server Hub (Janusz Ciuruś / BESTCONNECT, 4DataCenter Katowice, Poland) announced as an additional GPU inference sub-processor for the EU tier and Peer-to-Peer/Global base capacity, effective 21 Nov 2026. EU-tier requests still stay in the EU. You may object in text form until the end of 20 Nov 2026 under DPA section 6.2.

Previous versions.