Pro Pluribus
Business systems + AI for founder-led companies
Atlas / Skills / Documents, decks & spreadsheets

AI skills for documents, decks & spreadsheets

AI Market Atlas · by Pro Pluribus

Skills and plugins for documents, decks & spreadsheets that work in Claude, ChatGPT, Copilot or Gemini, checked 10 Nov 2026. Each passed the shelf's vetting test; read the note on each one.

Read before installing. Check who publishes a skill, what accounts it can reach, and whether it runs commands on your computer. Even official skills can.
Before you install7 checks
Built in

Document skills (Excel, PowerPoint, Word, PDF)

Anthropic · AI vendor

Create and edit workbooks with working formulas, decks, Word documents; extract, merge, fill and OCR PDFs.

Runs on
Claude on all plans including Free (code execution must be on); any SKILL.md tool
Check
Official, but the xlsx, pptx and docx skills show "Warn" audit verdicts on skills.sh because they run shell commands; the pdf skill passed all three (checked 10 Nov 2026, pass 1)
Notable
The teaching example: official skills still need reading before use
support.claude.com ↗skills.sh ↗skills.sh ↗
Built in

ChatGPT for Excel, Word and PowerPoint

OpenAI · AI vendor

Edits live workbooks, documents and decks from a side panel, asking permission before each change.

Runs on
Microsoft Office (add-in)
Check
Official; installed by user or admin from Microsoft Marketplace; some PowerPoint features missing
Notable
Excel add-in generally available 5 May 2026
openai.com ↗marketplace.microsoft.com ↗
Built in

/match-my-writing-style

Google · AI vendor

Drafts in the user's own voice; can be stacked with other skills in one prompt.

Runs on
Gemini app and Workspace
Check
Official premade skill; "availability varies"; skills do not sync between Gemini app and Workspace
Notable
Premade skill shipped with the Gemini Skills launch that replaces Gems (app rollout from 13 Oct 2026)
gemini.google ↗workspaceupdates.googleblog.com ↗
Business app connections

Gamma

Gamma · Software company

Creates presentations, documents and web pages from a prompt.

Runs on
Claude (connector), Copilot (partner plugin)
Check
Needs Gamma account
Notable
Listed by both Anthropic and Microsoft; Anthropic customer story
claude.com ↗learn.microsoft.com ↗

Before you install any skill

  1. Who publishes it? Prefer the AI vendor or the company that owns the app being connected.
  2. Has it been reviewed? Look for a verified badge, or the security ratings on its skills.sh page.
  3. What accounts does it connect to, and what can it do there? Prefer read-only; check anything that can send, pay or delete.
  4. Does it run commands on your computer? A “Warn” rating often means it does, even for official skills.
  5. Has your IT team approved it? Use the admin-managed catalogue where there is one.
  6. Do you know how to disconnect it and revoke its access?
  7. Finance, legal and HR output still needs review by a qualified person.

This map is a by-product of the work. Keeping track of what each of these actually does, and which ones are worth your time, is part of how I advise founder-led companies on AI. If you want that applied to your business, the first conversation is free.

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Compiled from public sources by Pro Pluribus; updated 10 Nov 2026. General information, not advice. Company names and logos belong to their owners and are used to identify them, without affiliation or endorsement. Terms