Free AI-Built Word and Excel Clones Are Here. They're Not Ready for Your Client Files

Primary sources: the project repositories on GitHub, WordCraft, GridCraft and DeckCraft (read October 12, 2026). Background reporting: Tom's Hardware.

An independent developer behind ArtCraft, a small studio that recently released free stand-ins for several Adobe apps, has now put three Office look-alikes on GitHub: WordCraft (Word), GridCraft (Excel) and DeckCraft (PowerPoint). Press coverage says he built them with help from Anthropic's Claude. They are free, open source under MIT or Apache-2.0, written in Rust, and run on Mac, Windows, Linux and in a browser.

What the projects say about themselves

The repositories are more modest than the headlines, which is to their credit.

• WordCraft is in alpha. It covers 88% of Word's ribbon commands, but the team estimates it is about 60% of the way to replacing Word for real work. Beta still needs testing against real-world .docx files and keeping charts and SmartArt intact.
• GridCraft is in alpha. It covers 89% of Excel's ribbon commands in the team's own catalog, and the team estimates it is about 50% ready for real work. Fidelity on real-world XLSX files is listed as next.
• DeckCraft is in alpha. It covers 79% of PowerPoint's features by breadth and is estimated at about 55% of the way to replacing it.

A ribbon button that exists is not the same as a feature that behaves like Word's. Every one of these numbers is the project's own estimate.

What it actually shows

The useful news is not "Office is dead." It isn't. The news is that one experienced engineer with a strong coding model can now produce a plausible, working rival to a mature product in days rather than years. That changes the economics of software you pay for, slowly and unevenly.

For a small firm, it shows up in two ways. First, more free and cheap alternatives will appear, and some will be good. Second, the custom tool you were quoted months of work for, an intake form, a document assembler, a client-report generator, can now be built far faster. That is the part worth acting on.

The risks before you switch anything

• Files are your work product. If a contract or a set of accounts loses formatting, tracked changes or a chart on a round trip, that is a client problem. Test on copies of real documents, never on originals.
• Licensing and IP. The code itself is permissively licensed, which is fine to use. The "clean-room" claim, built from public specifications without the original source, has not been tested in court. That is the developer's risk more than yours, but know where your tools come from.
• Support. There is no help desk. If something breaks the night before a filing, you are on your own or in a Discord channel.
• Security and maintenance. Fast-built software needs someone patching it for years. Ask who that is before any tool touches client data.

What to do with this

Don't cancel Microsoft 365 over a headline. Do list what you pay for software each year and which features your people actually use. Our AI cost calculator puts subscriptions and AI spend side by side. Then pick the one internal process where a small custom tool would save real hours. That is where AI-assisted building pays off today, with someone accountable for testing and upkeep; it is the work an AI automation agency should do for a firm without an IT department.

Benchmarks

Coverage reports the earlier Adobe-style apps were built with Claude Opus 5.5. Anthropic's Claude Opus 5.5 system card reports 89.9% on SWE-bench Pro and 93.9% on SWE-bench Multilingual (max effort, Anthropic's own runs). Mercor's independent leaderboard lists 98.2% on SWE-bench Verified. These measure fixing code issues, not shipping a word processor.

Bottom line

A rough free Office is real and getting better. It is not ready to hold your client files. The bigger shift is cheaper custom software, and that one is usable now.