Where you and your AI write on the same page.
A calm markdown workspace you own — Claude Code, Cursor, claude.ai, and Cowork read it, draft into your documents, and propose edits you approve, every change signed. Not a memory you query — one you write in, open, and correct. You stay the editor.
No credit card · Free plan · Works with Claude Code, Cursor, claude.ai & Cowork
Q3 Research Notes
Findings from the EMEA pipeline review, summarised for the board deck.
Revenue grew 12% in Q3. 18% QoQ, led by EMEA.
See it in action
See it in 90 seconds.
Clip three sources, let your AI draft inside a Syncpen doc, approve its edits, and publish — without leaving your workflow.
What users are saying
Users who switched, and stayed.
Syncpen leaves me alone with the whisper of my thoughts. At last, I find writing pleasurable again.
It has become something more valuable: a shared blackboard between me and the AIs. It is a gift I didn't realize I needed.
It stores images at high resolution inside the file. In Google Docs, images had to be sent separately.
How it works
From your AI to published, in three steps.
01
Connect your AI
One command connects any MCP client — Claude Code, Cursor, Cline, Windsurf. Or paste our hosted URL into claude.ai or Cowork — no install. First write in five minutes.
claude mcp add syncpen --env SYNCPEN_API_KEY=sp_… -- npx -y syncpen-mcpFull setup for every client →
02
It works in your documents
It searches your library for context, drafts new documents, and proposes changes as tracked suggestions. It can read and answer your comment threads, too.
03
You approve and publish
Accept or reject each suggested change, then ship to WordPress, Ghost, or Sanity. Every edit your AI makes is signed.
The agent layer
Your agents propose. You approve. Every change is signed.
Run several agents in the same project and you still see every change, who made it, and approve it — the human-and-agent review surface no other MCP writing tool ships. This is the wedge.
the metric is roughly 12%
the metric is 18% QoQ
Track-changes, born agent-first.
Your AI suggests edits; you accept or reject each one. It never overwrites your words silently — the original stays until you say so.
Is this number current?
Updated to Q3 — yes. · Claude
Comments as a conversation.
Leave a note in the margin and your AI answers right there in the thread — not buried in a terminal log.
version history
Signed and attributed.
The version history shows who wrote what, human or AI — so a shared document never leaves you guessing.
Efficiency, measured
We measured ~5× fewer tokens on our own workspace.
Your agent reads the one right document instead of everything that looks relevant — across 20 real tasks on our own workspace.
~5×
fewer tokens
to the same answer
Measured over Syncpen’s own 100+ document workspace — index discipline vs. reading every search hit, across 20 tasks.
Don’t let your AI hold your memory hostage.
Proprietary memory dies with the subscription. Your Syncpen workspace is plain markdown you own, connected over MCP — the open standard — so any agent can work in it, and none of them can keep it.
Your Syncpen workspace
Documents · history · links · every signed change — stays put.
Switch your AI. Not your memory.
Also a great editor
Also a genuinely good place to write.
With or without an AI in the room.
- Real-time collaboration
- Multiple cursors, live presence, and role-based sharing.
- Markdown-native
- Write in markdown, stay in markdown. No lossy conversions.
- Built-in research
- BibTeX, Zotero, and Mendeley import, with automatic bibliography.
- One-click publishing
- WordPress, Ghost, and Sanity, plus PDF export.
- Minimal by design
- The calm alternative to all-in-one bloat.
“Why not just use…”
Each tool is great at its corner. Syncpen is the combination.
The middle column names each tool’s real strength — not a knock. Syncpen’s pitch is the combination, and being the one your AI can work inside.
| If you use… | What it’s great at | What Syncpen adds on top |
|---|---|---|
| Google Docs + a CMS | Easy sharing and editing | Native markdown that publishes to WordPress, Ghost, or Sanity in one click. |
| Notion | A flexible all-in-one | True markdown, a focused writing surface, and an AI that writes in your docs. |
| iA Writer / Ulysses | A beautiful, focused writing feel | Real-time collaboration and one-click publishing. |
| HackMD | Markdown with live collaboration | A review surface for your AI — edits arrive as signed suggestions you accept or reject, not silent writes — plus one-click CMS publishing and citations. |
| A vector DB for agent memory | Fast similarity search | A knowledge base your agent writes to that you can open, read, and correct. |
If you use Obsidian
The graph you love — but your whole team writes in it.
Obsidian is the best single-player, local-first vault. Syncpen is the collaborative one: the same linked-notes graph, except your team and your AI work in it together, in real time — and you publish straight from it.
Obsidian
Best as a single-player, local-first vault.
- Plain markdown files on your own disk — offline and private
- A graph of your personal vault
- 1,400+ community plugins and themes
- Native desktop and mobile apps; free for personal use
Syncpen
the collaborative oneThe same graph — shared, in the cloud, with your AI in it.
- A shared graph — your whole team’s linked notes, not just one private vault
- Real-time co-editing with comments, @mentions, and roles
- Your AI writes in it — a built-in MCP server; edits arrive as signed suggestions you approve
- One-click publishing to WordPress, Ghost, and Sanity
Prefer plain files on your own disk, fully offline, with a huge plugin ecosystem? Obsidian’s the right call. Want to think together in one shared graph — with your AI in it? That’s where Syncpen wins.
Where it’s going
A knowledge base your agents read and write — and one you can actually open, read, and trust.
Today, your AI drafts, suggests, and comments — and you approve. Next: richer retrieval and durable memory across sessions.
Pricing
Start free.
Everything you need to write, connect your AI, and publish. Upgrade when you need more room and higher AI limits.
Free, no credit card · paid plans later
Built for researchers, coders, and content teams who live in markdown — and the AIs they work with.
Start free — connect your agents, bring a teammate, link your blog.