More structured than spreadsheets.Lighter than MS Project.
Structure the work as a WBS — the Gantt, CPM schedule, baselines, SPI, sharing and reports follow.
Still working like this?
Keep one WBS alive, and everything else follows.
Start from a template, not a blank page.
Pick an industry template (IT, construction, general…) in Korean or English, and the 100% Rule guides you as you break the work down — the first draft is fast and standards-clean.
Insert anywhere — it re-flows itself.
Drag a node in or out and WBS codes, weights and the 100% Rule check all update automatically. Weights redistribute across siblings — no renumbering by hand.
Build once. It’s already a Gantt.
The WBS tree and Gantt share one data model. Link dependencies (FS·SS·FF·SF, lead/lag) and CPM computes the schedule and highlights the critical path — on working days, Korean public holidays included.
One link. Always the latest plan.
Invite members with roles, or hand stakeholders a read-only share link (PIN optional) — no account needed. Everyone sees the same live plan in the browser.
Reports are one click away.
Enter progress on work packages and it rolls up the tree. The overview dashboard tracks milestones and the critical path, and the whole WBS exports to Excel — cover page and weekly/monthly report sheets included, in Korean or English.
Lock the plan. See the drift.
Set a baseline the moment the plan is approved. The Gantt overlays baseline bars under the current schedule and the overview shows the variance — so “are we off plan?” finally has an answer.
See the risk before it reaches the deadline.
Your progress data becomes a live SPI, an S-curve of planned vs earned value, and a top-delay list of the work packages dragging the schedule — refreshed daily against the baseline.
Your AI assistant is a team member now.
Connect Claude, ChatGPT or any MCP client to wbsgantt. The AI reads, drafts and edits your WBS in conversation — you stay the PM who approves.
- Issue an API token in Account settings (read-only or read+write).
- Add https://api.wbsgantt.com/mcp/ and the token to your MCP client.
- Start chatting — “show me my wbsgantt projects”.
Server-side guardrails: dependency cycles blocked, milestones stay zero-duration, the 100% Rule checked. Tokens expire in 90 days and can be revoked anytime.
Everything below ships today. No asterisks.
From blank page to a working schedule in minutes.
Why teams switch to wbsgantt
| MS Project | Primavera | Jira | wbsgantt | |
|---|---|---|---|---|
| WBS standard validation | ||||
| Native Gantt | ||||
| CPM critical path | ||||
| AI editing via MCP | ||||
| No install | ||||
| Read-only share links | ||||
| Korean holiday calendar | ||||
| Baselines | ||||
| Schedule EVM (SPI) | ||||
| Real-time collaboration | Soon |
“Soon” means on our roadmap — we don’t claim it before it ships.
Questions PMs actually ask
Where is my data stored?
In a PostgreSQL database on AWS (Seoul region). Every project belongs to your organization (tenant) and is isolated per tenant.
How is this different from Excel?
Excel holds numbers; wbsgantt holds structure. Codes renumber themselves, weights keep the 100% Rule, dependencies drive a CPM schedule — none of which a spreadsheet checks for you.
Can AI build my WBS?
Yes — connect Claude or ChatGPT via MCP and the AI can create a whole project from a document, edit nodes, wire dependencies and draft dictionaries. Setup guide: github.com/humhon-labs/wbsgantt-mcp.
Can I import MS Project files?
Not yet — XLSX/MPP import is on the roadmap. Today you can export the whole WBS to Excel, and create projects from documents via the AI (MCP) route.
Which languages are supported?
The whole app ships in Korean and English — templates, Excel exports and this site included. PMBOK terms stay in standard English in both.
Is it free? How do I get in?
Free during the private beta. Request access with the beta form, or sign up right away if you have an invite code. The live demo needs no account at all.