What AI does Heisenbug use?

Heisenbug uses 1 AI tool (1 observed): Resend.

Yes. Resend: observed, the vendor shows Heisenbug on its own pages.

Confirmed: a case study, a named quote or a press release. Observed: the vendor shows Heisenbug on its own pages, for example a logo wall. Signal: a job post shows Heisenbug’s employees use the tool, the weakest proof. Every level counts, and each line shows its level.

The most recent check was on November 13, 2026. 1 of the 1 line have been checked so far, from 1 public source.

Each tool is linked to a public page that names Heisenbug: a vendor's customer page, a published case study, a press release or a job post. We save most pages with a dated capture and check them again on each run. A tool leaves the list only after three checks in a row that no longer find Heisenbug, and at least 14 days after it was last seen. A tool with a published case study or quote is never removed automatically.