Write on real pages, as in Word. Discuss, share files and use AI in the same place.
Collab-Writer is a shared workspace to write documents for academic, work and school projects. All authors write in the same document and share the references, the comments and the version history. Each author can also connect an AI tool.
Write documents together. Discuss the text in comments.
Each author sees the changes of the other authors as they type. The cursor of each author shows the name of that author. You do not merge two versions of a file. Your supervisor opens the same document that you write.
Connect a model with an API key, or give the document to an agent. The AI works on the text of the document. You do not paste a copy into a chat window. Each author connects the AI that they prefer. One author can write with one model, and a different author can review with a different model.
The app saves a version of the document every few minutes, with the name of its author. Save a labeled version before you submit. Compare two versions as a marked-up PDF or Word file, and restore an earlier version.
Search your Zotero or Mendeley library and cite from it. The app makes the reference list from your citations. Change the citation style once, and the full document uses the new style. You do not renumber references by hand.
The Editor tab shows real pages, as in Word, and holds the master copy of the document. The Draft tab shows the same text without pages, for Grammarly and other writing tools. The Source tab shows the LaTeX source. You can edit the source and press ⌘⏎ to apply the changes to the document. Authors who write LaTeX and authors who do not can work on the same document.
The PDF tab shows your pages exactly as the Editor shows them. The LaTeX PDF tab typesets the document with LaTeX for a submission. Download a PDF, export the document to Word (.docx), or download its .tex source. We do not keep your text in a format that only we can read.
Both connections are free to set up. We do not sell either of them to you as a subscription.
Connect your Zotero account with an API key, or sign in to Mendeley. Then you can search your full library in the editor. Cite from it as you write. The app makes the reference list in the style that the journal requires. A reference that you add to your library shows in the next search. You can also add the references of a document to your library.
Paste an API key, or connect Collab Writer to an agent that you already use. The AI works inside the document. For example, it can make a paragraph shorter or check a proof. We charge nothing for the connection and take no part of your usage. The key is yours, and you select the model.
The Free plan has no time limit. Pro gives unlimited papers, appendices and LaTeX PDF pages, a longer version history, more storage and offline writing.
| Free$0 | Pro |
|
|---|---|---|
| Papers | 1 | Unlimited |
| Appendices per paper | 10 | Unlimited |
| LaTeX PDF pages per paper | 70 | Unlimited |
| Team size | Up to 3 | Unlimited |
| Comments & tracked suggestions | ✓ | ✓ |
| Zotero & Mendeley | ✓ | ✓ |
| Your own AI (key or agent) | ✓ | ✓ |
| Version history | 1 day | 90 days |
| LaTeX PDF renders | 25 / day | No daily limit |
| Upload size per file | 5 MB | 25 MB |
| Media storage | 100 MB | 10 GB |
| Work offline (two-way text file sync) | — | ✓ |
| Custom AI skills, with Academic Humanizer | — | ✓ |
| PDF, Word and .tex export | ✓ | ✓ |
| Start writing | Get Pro |
A lab or a department can ask us for group accounts, single sign-on and shared reference libraries. Talk to us →
Yes. Each co-author needs an account to open the document. The link alone does not give access. To show the draft to a person who must not change it, invite that person as a Viewer. On the Free plan, a viewer is one of the 3 people on the team.
You do. We store your documents so that you can work on them. We do not claim rights to them, and we do not use them to train any model.
Yes, at any time and on all plans. Download a PDF of the document, export it to Word (.docx), or download its .tex source.
The document keeps the edits of both people. It merges the edits as they arrive. There is no lock and no queue, and you have no conflicts to resolve after.
On all plans, you can continue to write when the connection drops. The app sends your changes when the connection returns. To work with no connection for a longer time, use “Sync as a text file (two-way)…” on Pro. It keeps a .tex or .txt copy of the document in a folder that you select. Edit the file in any text editor, and the app copies your changes back into the document.
No. Connect your own API key or your own agent, and use it as much as you want. We add no charge to it on any plan.
No. The Free plan does not expire, needs no card and is not a trial. It covers one paper with up to ten appendices, and a team of up to three people, with your references and your own AI. When a paper needs more, Pro removes these limits for $5 a month. You do not have to upgrade.
Start a document and invite your co-authors. You do not install anything, and you have nothing to cancel.