Sources and method.

Editorial method

Product information comes from the official websites and documentation linked below. Sources for this first catalog were reviewed on September 30, 2026. The information is a documented snapshot; prices, access, and features may change.

The assignment to tool types and tasks is editorial. Product family, specific product, and interface are described separately. Core features, requirements, and limitations link to the relevant primary source in each profile. Items marked “Still open” are not clearly answered by the sources reviewed. The date on the profile indicates when sources were reviewed. Use cases are our own suggestions based on documented capabilities. They are marked as examples and were not carried out as product tests.

Unconfirmed product identities

Buzz is explicitly described as a platform by Block; the identity of the entry with the same name in the original thread remains unconfirmed. Vellum's specific product context is stated. Earlier names such as Microsoft Scout remain searchable. Genii's early development stage is explicitly noted.

Starting point

John Rush: Overview of 21 general-purpose agents

The thread serves as a discovery source. Its subjective assessments are not presented here as our own test results.