Does Hail use OpenAI?
Yes
We hold strong evidence for this.
- The company names it in its own subprocessor list, a statement that this vendor handles its customers' data.
How we know
About Hail
Hail gives AI assistants a phone number and email inbox so they can handle calls, texts, and email. It serves people setting up AI receptionists and developers adding AI calls, email, and SMS to apps through an API.
Summarized from its homepage on 10 Nov 2026.
What else Hail uses
Hail has evidence for 21 vendors. The strongest:
Vercel
Deepgram
LiveKit
PostHog
Stripe
Supabase
Amazon Web Services
Anthropic
Cartesia
DIDWW
Other companies using OpenAI
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- Every company and vendor, with its public source
- 100 API calls a month, plus MCP and the Chrome extension
- Work email only. No card, no sales call