The Stack Index / Action Surface
serves Motion
Action Surface
Where the rep or agent works, and where sends actually go out.
The layer most stacks skip.
Updated 1 Oct 2026, the date of the latest episode citing a tool in this layer. Cite as: GTM Vault, The Stack Index, “Action Surface”, https://pro.gtmvault.co/stack/layer/action-surface, updated 1 Oct 2026.
Common questions
- What is the Action Surface layer?
- Where the rep or agent works, and where sends actually go out. It serves Motion in the eight-layer model of revenue architecture. The layer most stacks skip.
- Which tools do operators run in the Action Surface layer?
- 15 tools are placed in the Action Surface layer, 10 of them named by an operator running them in a working system. The most-named are Slack (5 operators), Instantly (4 operators), Lemlist (2 operators), Outreach (2 operators) and Chili Piper (1 operator).
- How does a tool get placed in the Action Surface layer?
- A tool is placed by the function it performed in a named operator's system, described on a Show Me Your Stack or GTM Vault Podcast episode, or by a GTM Vault essay recommendation. The two grades are shown separately and never blended. Placement is not for sale.
Counted with the layers next to it
The action surface layer is one part of a working system. These pages rank every tool across this layer and the ones it runs with, by how many operators described running each.
The outbound tools operators run, by operator count
New operator stacks, as they are published
Every Show Me Your Stack episode adds operators and tools to this index. Subscribe to GTM Vault and get each one as it lands.
← Orchestration · All layers · What the layers mean · System of Record →