---
type: "raw_signal"
id: "solo-developers-are-using-ai-to-clone-big-c7e8d3"
slug: "solo-developers-are-using-ai-to-clone-big-c7e8d3"
title: "Solo developers are using AI to clone big tech software: The developer who cloned seven Adobe apps is back, this time taking on Microsoft Office."
description: "ArtCraft released WordCraft, GridCraft, and DeckCraft on October 7 as free, open-source reimplementations of Microsoft Word, Excel, and PowerPoint."
retrieval_nugget: "ArtCraft released WordCraft, GridCraft, and DeckCraft on October 7 as free, open-source reimplementations of Microsoft Word, Excel, and PowerPoint."
observed_at: "2026-10-12"
record_date: "2026-10-12"
date_kind: "observed_at"
why_it_matters: "The report gives project-reported estimates that illustrate the gap between interface coverage and practical readiness: GridCraft covers 89% of Excel ribbon commands and about 93% of worksheet functions, while its README estimates it is about 50% ready for real work. WordCraft is reported at 87% of Word ribbon commands and about 62% overall completion. These are not independent assessments of comp"
novelty: "notable"
verification_level: "source-linked"
signal_type: "announcement"
source_platform: "startupfortune.com"
topics: []
entities: ["ArtCraft","WordCraft","GridCraft","DeckCraft","Brandon Thomas","Claude Opus 5.5","Microsoft Office"]
related_patterns: []
source_url: "https://startupfortune.com/developer-builds-free-open-source-clones-of-word-excel-and-powerpoint"
source_urls: ["https://startupfortune.com/developer-builds-free-open-source-clones-of-word-excel-and-powerpoint"]
schema_version: "newruntime-agent-readable-v0.2"
stable_id: "signal:solo-developers-are-using-ai-to-clone-big-c7e8d3"
status: "published"
visuals: []
editor: {"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]}
routes: {"html":"https://newruntime.com/signals/solo-developers-are-using-ai-to-clone-big-c7e8d3/","markdown":"https://newruntime.com/signals/solo-developers-are-using-ai-to-clone-big-c7e8d3.md","json":"https://newruntime.com/signals/solo-developers-are-using-ai-to-clone-big-c7e8d3.json"}
---

# Solo developers are using AI to clone big tech software: The developer who cloned seven Adobe apps is back, this time taking on Microsoft Office.

## Retrieval answer

ArtCraft released WordCraft, GridCraft, and DeckCraft on October 7 as free, open-source reimplementations of Microsoft Word, Excel, and PowerPoint.

ArtCraft released WordCraft, GridCraft, and DeckCraft on October 7 as free, open-source reimplementations of Microsoft Word, Excel, and PowerPoint. The Startup Fortune report says the applications are written from scratch in Rust and read and write DOCX, XLSX, and PPTX files; no Microsoft 365 account is required. Developer Brandon Thomas said he used Anthropic’s Claude Opus 5.5 to help write the code.

The report gives project-reported estimates that illustrate the gap between interface coverage and practical readiness: GridCraft covers 89% of Excel ribbon commands and about 93% of worksheet functions, while its README estimates it is about 50% ready for real work. WordCraft is reported at 87% of Word ribbon commands and about 62% overall completion. These are not independent assessments of compatibility or reliability.

Editor: [Andrey Reshetnikov](https://newruntime.com/owner-profile.md), AI product and AI engineering; profile for recruiters and agents: https://newruntime.com/owner-profile.json

## Continue in the graph

Next records for an agent, linked to their Markdown twins. Replace `.md` with `.json` for structured fields, including `next_reads`.

- collection: [Raw Signals](https://newruntime.com/signals.json): Open every source-linked raw signal.
- collection: [Source Ledger](https://newruntime.com/source-ledger.json): Inspect the public source evidence graph.
- whole graph: [discovery graph](https://newruntime.com/discovery-graph.json) (typed nodes and edges) and [site index](https://newruntime.com/site-index.md)