10 Best Free Gantt Chart Tools in 2026 (Honest Comparison)
I tested every popular Gantt chart tool with the same 24-task project. Here's the honest breakdown — which ones are actually free, which trap you with limits, and which give you the most for zero dollars.
-->The methodology
For each tool, I built the same project: 24 tasks, 7 phases, with finish-to-start dependencies and one summary row. I evaluated:
- Free-tier limits — projects, tasks, users
- Signup requirements
- Working-day math
- Dependency support
- Export options
- Privacy — where does your data live?
- Time to first chart
Quick comparison table
| Tool | Signup | Free Tasks | Dependencies | Best For |
|---|---|---|---|---|
| GanttBuilder | No | Unlimited | FS, multi-pred | Solo, privacy |
| Asana | Yes | Unlimited (15 users) | All types | Small teams |
| Monday.com | Yes | Limited (free trial) | All types | Mid-sized teams |
| ClickUp | Yes | Unlimited | All types | Feature breadth |
| TeamGantt | Yes | 60 tasks, 1 project | FS, FF | Visual quality |
| GanttPRO | Yes | Free trial only | All types | Pro features |
| Instagantt | Yes | Free trial only | All types | Asana integration |
| Notion | Yes | Unlimited | No | In-doc charts |
| Google Sheets | Yes | Unlimited | Manual | Spreadsheet folks |
| Mermaid (Markdown) | No | Unlimited | FS only | Developers |
1. GanttBuilder (our pick for solo + privacy)
Price: Free, no signup, no limits.
Data: Stays in your browser's localStorage. No server, no tracking.
I'm biased — I built this — but the comparison logic still applies. GanttBuilder is the only tool on this list with zero signup, zero limits, and zero data collection. Working-day math, dependency arrows, hierarchical summary roll-up, and a classic professional look are all built in. Export to single-file HTML or print to PDF.
Best for: solo planners, freelancers, anyone who wants a clean chart without an account. Try it: https://aistory.antlog.kr/p/gantt-builder-tool.html.
Limits: No real-time collaboration. No cloud sync (use CSV for backup). No automatic holiday handling.
2. Asana
Price: Free for up to 15 users; paid plans start at $10.99/user/month.
Data: Asana's servers (cloud-only).
Asana's free tier is one of the most generous for small teams. The Gantt-style "Timeline" view requires the paid tier ($10.99/user/month), but Asana's list/board views often suffice for early-stage projects. Try Asana.
Best for: teams of 2–15 who need shared tasks and assignments.
Watch out: Timeline (Gantt) view is behind the paywall. Free users get list and board views only.
3. Monday.com
Price: Free trial only. Paid plans start at $9/user/month (3-user minimum, so $27 floor).
Data: Cloud.
Monday.com calls itself "Work OS." It has a polished Gantt view, but the free tier disappears after 14 days. Best-in-class for mid-sized teams who'll commit to a paid plan. Try Monday.com.
Best for: teams of 3+ already evaluating PM platforms.
4. ClickUp
Price: Free tier with unlimited tasks; paid plans from $7/user/month.
Data: Cloud.
ClickUp's free tier is genuinely useful — Gantt view is included, tasks are unlimited, you get 100MB of storage. The interface is dense (some say cluttered), but it's powerful. Try ClickUp.
Best for: users who want all-in-one PM with Gantt as one of many views.
Watch out: Steep learning curve. Free tier limits some advanced features (custom fields, time tracking).
-->5. TeamGantt
Price: Free for 1 project, up to 60 tasks. Paid from $19/user/month.
Data: Cloud.
Some of the cleanest Gantt visuals on the market. The 60-task limit on the free tier is a serious constraint — most real projects exceed it. Great if you want a polished chart and your project happens to fit.
Best for: small projects where visual quality matters (client presentations).
6. GanttPRO
Price: Free trial only. Paid plans from $15/user/month.
Data: Cloud.
GanttPRO is Gantt-first (unlike the others, which are PM platforms with Gantt views bolted on). Polished, full-featured. But there's no permanent free tier — after the trial, you pay.
Best for: teams evaluating dedicated Gantt software with budget.
7. Instagantt
Price: Free trial only. Paid from $7/user/month.
Data: Cloud.
Built primarily as an Asana extension. If you already use Asana and need a Gantt view, this can be cheaper than upgrading Asana's plan.
8. Notion
Price: Free tier with unlimited pages (personal use). Paid from $10/user/month for teams.
Data: Cloud.
Notion has a Timeline database view that approximates a Gantt chart. No real dependency support — bars are positioned manually. Best when your project lives inside a doc-heavy workspace. Try Notion.
Best for: users who already organize work in Notion.
9. Google Sheets
Price: Free.
Data: Google Drive.
You can build a Gantt chart in Sheets using conditional formatting or stacked bar charts. Many free templates exist (search "Google Sheets Gantt chart template"). Manual, but flexible and zero cost.
Best for: spreadsheet-natives who don't want a new tool.
Watch out: Dependency math is manual. Updating dates requires re-editing dozens of cells.
10. Mermaid (Markdown)
Price: Free, open source.
Data: Wherever your markdown lives.
Mermaid is a text-to-diagram language. Write a few lines of markdown, get a rendered Gantt chart. Works inside GitHub, GitLab, Notion, Obsidian, and many static-site generators. Limited styling, no left-side task table.
Best for: developers who want a chart inside their README or docs.
How to choose
The decision tree:
- Solo + privacy + no signup: GanttBuilder
- Team collaboration, want generous free tier: Asana or ClickUp
- Polished visuals for client presentation: TeamGantt (if under 60 tasks) or GanttBuilder
- Already on Notion or Sheets: stay there, use built-in views
- Developer, docs-first workflow: Mermaid
- Enterprise, complex resource management: MS Project or Primavera (not on this list — neither is free)
What I actually use
For my own small projects, I use GanttBuilder (the tool I built). For client work with a team, I use Asana's free tier for tasks and export to GanttBuilder for the printable timeline. For internal docs, Mermaid inside README files.
The right answer depends on team size, budget, and privacy preferences. There's no universal best.
-->Try the free option first
If you haven't picked a tool yet, start with the zero-friction option: open GanttBuilder and click Load Sample. If it fits your project, great. If not, you've spent zero time and zero dollars finding out — and you know what to look for in the paid alternatives.