Velt×
SuperDocAdd comments and co-editing, plus live presence, to your SuperDoc editor, for your users and your AI agents. Threads stay pinned to the paragraph as the document edits, and every agent edit lands as a suggestion your users approve, so a comment on a clause stays on that clause through a redraft.
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7.2 The Provider shall indemnify and hold harmless the Client against all claims arising from the Services.
Flagged a missing liability cap on the clause and suggested a redline.
The problem
Your users expect to comment and co-edit in SuperDoc, and your AI agents need that same document with a human approving before they touch user work. Comments that survive SuperDoc's docx edits are a multi-quarter build, and the moment anchoring breaks, feedback lands on the wrong paragraph. Co-editing is the harder half: rolled by hand it means overwrites, lost work, and merge conflicts, the "my changes disappeared" bug reports, plus a websocket fleet and offline merge to keep alive. And the harder question is your agents: a useful agent needs to change the work, but an agent with write access to user content is what your buyers' security review blocks, so without a consent step you choose between an agent that is useful and an agent that is safe. Every quarter spent on this is a quarter not spent on your own product.
Velt is the review and collaboration layer built for SuperDoc: your users and your AI agents work the same document, with comment threads anchored to the paragraph, and every agent suggestion is a change a human approves before it lands.
Features
Clause 7 omits a liability cap. Suggested fix attached.
// An agent posts a suggestion as a first-class user.
await velt.comments().add({ author: agent, suggestion });
// On approve, the change fires through your webhook.Your AI agent comments and suggests on the document as a first-class user; a human approves or rejects, and on approve the change fires through your webhook with a permanent record.
@Maya pulled into the thread
2 Repliesimport { VeltComments } from "@veltdev/react";
<VeltComments textMode />On paragraphs and ranges, with replies, @mentions, and attachments.
Tiptap
Lexical
CodeMirror
BlockNote
React Flowplus the core library for your own editor, whiteboard, or grid
import { useVeltCrdtExtension } from "@veltdev/tiptap-crdt-react";
const extension = useVeltCrdtExtension({ editorId });CRDT merge on the docx content, so two people work the same document without overwrites.
import { VeltPresence, VeltCursor } from "@veltdev/react";
<VeltPresence />
<VeltCursor />Live presence on the document.
Suggested a tighter figure on the rate line.
// Propose changes reviewed like a diff.
<VeltComments suggestionMode />Propose redlines as accept-or-reject suggestions.
Maya mentioned you on Q3 forecastmention
“@you can you review before Friday?”
Sarah replied on the Q3 threadreply
forecast.xlsx · cell B12
Ethan requested your sign-offsign-off
contract.pdf · due today
import { VeltNotificationsTool } from "@veltdev/react";
<VeltNotificationsTool />In-app, email, and Slack alerts on every comment and @mention.
voice note · pinned to this cell
“The variance comes from the vendor rate change, see row 18.”
import { VeltRecorderControlPanel } from "@veltdev/react";
<VeltRecorderControlPanel />Pin a quick voice, screen, or video clip in context on the document.
await velt.versions().save({ name: "Draft v3" });
await velt.versions().restore({ id });Named checkpoints on the document, saved and restored by API.
const log = await velt.activities().get({ documentId });Every markup and approval on the matter, exportable.
A clause-review agent flags an off-standard term on the paragraph and suggests the redline as a first-class user; a human approves or rejects, and on approve the change fires through your webhook with a permanent record of who allowed what.
Setup
npm install @veltdev/react @veltdev/superdoc-crdt-reactimport { VeltProvider } from "@veltdev/react";
<VeltProvider apiKey={API_KEY}>
<App />
</VeltProvider>// Mount Velt on SuperDoc
<VeltComments />
// + the CRDT adapter for co-editingWhy Velt
Liveblocks syncs people and agents into your app's state; Velt adds the step Liveblocks does not, every agent change on SuperDoc is a suggestion your user approves or rejects, on the record.
Enterprise
The controls your buyers' security reviews ask for, in writing.
Adding Velt to SuperDoc does not move that surface's content off your stack. Per-feature data providers keep comment content, attachments, and user PII on your own infrastructure; Velt stores only minimal identifiers.
FAQ
Both. SuperDoc is a docx editor so Velt wires full CRDT co-editing alongside comment threads on the same document.
Yes. Threads anchor to paragraphs by stable identifier, not byte offset, so they survive reformatting, copy-paste, and round-trips through docx.
Yes. Velt suggestions map to the tracked-change model so suggestions your agents propose appear alongside native tracked changes.
Yes. An agent posts the suggestion on the paragraph as a first-class user, and a human approves or rejects before the change lands.
No. Velt handles the realtime sync and persistence; you wrap your app in VeltProvider with your API key and mount the adapter.
On usage, not seats or integrations: you pay for documents with review activity in a month, with a free tier for development and early production.
Free tier. No credit card.
First comment in 5 minutes.
Apryse
Nutrient