# 37signals 37signals declares [12 subprocessors](https://thirdpartyindex.com/vendors/37signals#subprocessors) in [its subprocessor list](https://37signals.com/policies/privacy/basecamp-subprocessors), which we last checked on 2026-10-30 ([evidence](https://thirdpartyindex.com/evidence/179987)). They include [Google Cloud](https://thirdpartyindex.com/vendors/google-cloud), [OpenAI](https://thirdpartyindex.com/vendors/openai) and [Anthropic](https://thirdpartyindex.com/vendors/anthropic). No published changes since we first read it on 2026-10-29. [1 tracked vendor](https://thirdpartyindex.com/vendors/37signals#used-by), [PROS](https://thirdpartyindex.com/vendors/pros), names 37signals as a subprocessor. 37signals (37signals.com): subprocessors, data processing agreement, security documents and changes, as monitored by Third Party Index. - Page: https://thirdpartyindex.com/vendors/37signals - Documents last verified: 2026-10-30 - Transparency rating: 84/100 (how much it publishes, not how secure it is): Subprocessor list 30/30; Processing locations 8/8; Purposes 7/7; Data processing addendum 12/12; Trust center 8/8; Privacy policy 6/6; security.txt 0/6 (not found); Security page 5/5; Status page 0/5 (not found); Vulnerability disclosure 0/5 (not found); Pages still reachable 8/8 - Supply chain: relies on 12 tracked vendors directly, 71 within two hops, 237 within three; 1 tracked vendors rely on it directly, 2 within two hops, 11 within three - Cite as: 37signals, Third Party Index, https://thirdpartyindex.com/vendors/37signals (data CC BY 4.0) ## Documents | Document | URL | Last verified | Last changed | |---|---|---|---| | Trust center | https://37signals.com/trust | 2026-10-30 | 2026-10-29 | | Subprocessor list | https://37signals.com/policies/privacy/basecamp-subprocessors | 2026-10-30 | 2026-10-29 | | Data processing addendum | https://37signals.com/policies/privacy/dpa | 2026-10-30 | 2026-10-29 | | Privacy policy | https://37signals.com/policies/privacy | 2026-10-30 | 2026-10-29 | | Terms | https://37signals.com/policies/terms | 2026-10-30 | 2026-10-29 | | Security page | https://37signals.com/policies/security | 2026-10-30 | 2026-10-29 | ## Subprocessors (12) As its own list states them. | Subprocessor | Purpose | Location | Listed since | |---|---|---|---| | [Anthropic](https://thirdpartyindex.com/vendors/anthropic.md) (AI model provider: Anthropic) | AI assistant tools used by our staff | United States | 2026-10-29 | | [Apple](https://thirdpartyindex.com/vendors/apple.md) | Push notifications to Apple devices | United States | 2026-10-29 | | [Birdie](https://thirdpartyindex.com/vendors/birdie.md) | Support request screen recordings | France | 2026-10-29 | | [Braintree](https://thirdpartyindex.com/vendors/paypal-us.md) | Payment processing services | United States | 2026-10-29 | | [Cloudflare](https://thirdpartyindex.com/vendors/cloudflare.md) | Cloud services provider | United States | 2026-10-29 | | [Google](https://thirdpartyindex.com/vendors/google-cloud.md) | Push notifications to Android devices | United States | 2026-10-29 | | [hCaptcha](https://thirdpartyindex.com/vendors/hcaptcha.md) | Anti-bot protection | United States | 2026-10-29 | | [Help Scout](https://thirdpartyindex.com/vendors/help-scout.md) | Help desk software | United States | 2026-10-29 | | [OpenAI](https://thirdpartyindex.com/vendors/openai.md) (AI model provider: OpenAI) | AI assistant tools used by our staff | United States | 2026-10-29 | | [Plausible](https://thirdpartyindex.com/vendors/plausible-analytics.md) | Analytics for signup and welcome pages | Estonia | 2026-10-29 | | [Sentry](https://thirdpartyindex.com/vendors/sentry.md) | Error reporting software | United States | 2026-10-29 | | [TaxJar](https://thirdpartyindex.com/vendors/taxjar.md) | Sales tax calculation | United States | 2026-10-29 | Read from ([evidence](https://thirdpartyindex.com/evidence/179987)). CSV: https://thirdpartyindex.com/vendors/37signals/subprocessors.csv AI model providers (or a cloud provider's AI model service) among these entries: 2. All vendors that list one: https://thirdpartyindex.com/ai ## Subprocessor of (1) Tracked vendors whose own subprocessor lists name it, and what they say they use it for. - [PROS](https://thirdpartyindex.com/vendors/pros.md): Basecamp project and communication management ## Incidents reported by 37signals's subprocessors Incidents reported in the last 30 days on their own status pages by 3 vendors 37signals lists as subprocessors. A subprocessor list names a company, not the service an incident touched. - 2026-10-30: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated errors with search in Dots, ChatGPT Work, and certain ChatGPT thinking experiences (minor) - 2026-10-30: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated errors for GPT Image 2 API image edits (minor) - 2026-10-28: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors affecting the Google Calendar connector (minor) - 2026-10-28: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors affecting the Gmail connector (minor) - 2026-10-27: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors for Claude Sonnet 5.5 (major) - 2026-10-27: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported 6.1 Sol Degraded Model Performance (minor) - 2026-10-27: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors for Claude Sonnet 5.5 (major) - 2026-10-27: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated error rates for most hosted Code Reviews and Security Reviews on private GitHub repositories (no impact stated) - 2026-10-26: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated error rates for Ads POST requests (minor) - 2026-10-25: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors for Claude Fable 5.1 (major) - 2026-10-25: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors for Claude Sonnet 5.5 and other models (major) - 2026-10-24: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors for Claude Fable 5 and Claude Fable 5.1 (major) - 2026-10-24: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors for Claude Opus 5.5 (major) - 2026-10-23: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors for Claude Fable 5.1, Sonnet 5.5, and Haiku 5.5 (critical) - 2026-10-23: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Degraded experience with ChatGPT app connections using CIMD (minor) - 2026-10-23: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Help Center Chat Support Degraded (no impact stated) - 2026-10-23: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Delays in customer support responses (no impact stated) - 2026-10-22: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported New Ad Accounts failing to provision admins (minor) - 2026-10-22: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Degraded Performance of Dots on Enterprise (minor) - 2026-10-22: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors affecting Connectors (minor) - 2026-10-22: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated ChatGPT conversation and Responses API errors (minor) - 2026-10-21: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Authentication errors for some users (major) - 2026-10-21: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Degraded performance for Claude Fable 5 (minor) - 2026-10-21: [Sentry](https://thirdpartyindex.com/vendors/sentry#status), which 37signals lists as a subprocessor, reported Increased latency processing integration webhooks (minor) - 2026-10-21: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated error rates for gpt-5.6-luna API requests (minor) - 2026-10-21: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated FedRAMP API error rates for Astra and Sol (minor) - 2026-10-21: [Sentry](https://thirdpartyindex.com/vendors/sentry#status), which 37signals lists as a subprocessor, reported Sentry.io not loading in US region (critical) - 2026-10-21: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Degraded performance in ChatGPT, Codex, and APIs (minor) - 2026-10-20: [Sentry](https://thirdpartyindex.com/vendors/sentry#status), which 37signals lists as a subprocessor, reported Sentry.io not loading (major) - 2026-10-19: [Sentry](https://thirdpartyindex.com/vendors/sentry#status), which 37signals lists as a subprocessor, reported Sentry is down (critical) - 2026-10-19: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported File Download errors (minor) - 2026-10-15: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Widespread feature degradation (major) - 2026-10-14: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Delayed Costs data in the Compliance API (minor) - 2026-10-14: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Limited availability on gpt-image-2.5-flare and gpt-image-2.5-sunburst (minor) - 2026-10-14: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Degraded performance in Codex and ChatGPT Work (minor) - 2026-10-14: [Sentry](https://thirdpartyindex.com/vendors/sentry#status), which 37signals lists as a subprocessor, reported Ingestion Halted for EAP data in EU (major) - 2026-10-13: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Degraded performance in GPT-6.1 Sol Codex and Work mode (minor) - 2026-10-09: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Workspace admins may be unable to manage plugins (major) - 2026-10-09: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Some ChatGPT content may be unavailable on Android (major) - 2026-10-09: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Delayed Costs data in the Compliance API (minor) - 2026-10-08: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Some APAC users are seeing errors in ChatGPT Work, conversations, and GPTs. (minor) - 2026-10-07: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated errors with GPT-5.6 Instant in FedRAMP workspaces (minor) - 2026-10-07: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Issue with spend limits (no impact stated) - 2026-10-07: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Degraded performance in Codex and Work mode: Dot turn failures, delayed responses, and reduced proactivity (minor) - 2026-10-07: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Dot in Codex may fail to create new threads (minor) - 2026-10-07: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors on platform.claude.com (major) - 2026-10-07: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Unable to create new ChatGPT Work threads in latest version of desktop app (major) - 2026-10-07: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors loading usage data on platform.claude.com (major) - 2026-10-07: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Workspace Agents Degraded and Responses Impacted (minor) - 2026-10-06: [Sentry](https://thirdpartyindex.com/vendors/sentry#status), which 37signals lists as a subprocessor, reported Sentry dashboard down (critical) - 2026-10-06: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Computer Use Is Experiencing Issues (minor) - 2026-10-06: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Errors processing large PDFs in the Responses API (minor) - 2026-10-06: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated error rates in ChatGPT Go conversations (minor) - 2026-10-06: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors for Claude Opus 5.5 (major) - 2026-10-06: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated errors affecting multiple products including ChatGPT (conversations), Image generations, Spaces and Pages, API rehydration, and Dots. (minor) - 2026-10-06: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated errors in API Platform login and administration APIs. (minor) - 2026-10-05: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated error rates in Codex Cloud (no impact stated) - 2026-10-05: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated errors in ChatGPT conversations (minor) - 2026-10-05: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Admin Console Intermittently Inaccessible (no impact stated) - 2026-10-05: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1 (major) - 2026-10-05: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Issues saving and editing Pages (minor) - 2026-10-05: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Elevated Work Mode errors (minor) - 2026-10-02: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Issues with data analysis and file creation in ChatGPT (minor) - 2026-10-01: [OpenAI](https://thirdpartyindex.com/vendors/openai#status), which 37signals lists as a subprocessor, reported Issues with login, signup, and ads (major) - 2026-10-01: [Anthropic](https://thirdpartyindex.com/vendors/anthropic#status), which 37signals lists as a subprocessor, reported Delayed credits on the Claude Platform (minor) The subprocessor list as we read it on any date: https://thirdpartyindex.com/labs/time-machine/37signals --- Third Party Index (https://thirdpartyindex.com) monitors vendors' public security and privacy documents and keeps each version as evidence. Data CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/); vendors' own documents are theirs. API: https://thirdpartyindex.com/api