Sub-processors

Last Updated: July 16, 2026 This page lists the sub-processors that Blacksmith engages to process Customer Personal Data on behalf of Customers and to support the delivery of our Services as defined in the Data Processing Addendum. The sub-processors relevant to a particular Customer depend on the specific Services they use. Blacksmith maintains an up-to-date list of all sub-processors below, with a description of their processing activities and the locations where data is processed. Customers may subscribe to updates about new or replacement sub-processors via the RSS feed on this page.

Blacksmith’s sub-processors

Subprocessor	Applicable Services	Processing Activities	Location
Anthropic PBC	Codesmith	AI model provider	United States
BaseTen Labs, Inc.	Codesmith	AI model provider	United States
Grok, Inc. (xAI)	Test Failure Summaries, Testboxes	AI model provider	United States
OpenAI Foundation	Test Failure Summaries	Test failure log embeddings	United States
Mistral AI SAS	Codesmith	Code embeddings/indexing	European Union
Daytona Platforms Inc.	Codesmith	Sandbox environments	European Union
Turbopuffer Inc.	Codesmith, Test Failures Summaries	Embedding vector storage	European Union
Braintrust Data, Inc.	Codesmith	LLM-trace observability	United States
Functional Software Inc (Sentry)	All services	Error monitoring and crash reporting	United States
Axiom, Inc.	All services	Logging and metrics	United States
PostHog, Inc.	All services	Product analytics, feature flags	United States
Vercel Inc.	All services	Frontend hosting and edge delivery	European Union
Pylon Labs, Inc.	All services	Customer service and technical support	United States
Plus Five Five, Inc. (Resend)	All services	Outbound email	European Union
Astrodon Corporation (Loops)	All services	Outbound email	United States
Cloudflare, Inc.	All services	DNS and object storage	United States, European Union
Amazon Web Services, Inc.	All services	Cloud hosting	United States, European Union
PlanetScale, Inc.	All services	Application database hosting	European Union
ClickHouse, Inc.	All services	Observability and analytics database hosting	United States, European Union
Redis Inc	All services	Queueing, streaming, and caching	United States, European Union
PhoenixNAP LLC	All services	Datacenter provider	United States, European Union
Hetzner Online GmbH	All services	Datacenter provider	European Union
Summit Hosting LLC	All services	Datacenter provider	United States
Megaport (Latitude.sh)	All services	Datacenter provider	United States
Salesforce (Slack)	All services	Collaboration; customer service and technical support	United States

For questions about our sub-processors, contact us at [email protected].

Changelog

Subscribe to this changelog via the RSS feed to be notified about new or replacement sub-processors.

Location corrections

Updated the processing location for Vercel Inc., Plus Five Five, Inc. (Resend), and Daytona Platforms Inc. to European Union.

New sub-processors added

Added BaseTen Labs, Inc. (AI model provider for Codesmith) and OpenAI Foundation (test failure log embeddings for Test Failure Summaries).

Initial publication

Published the initial list of Blacksmith sub-processors.

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Blacksmith’s sub-processors

Changelog

​Blacksmith’s sub-processors

​Changelog

Blacksmith’s sub-processors

Changelog