draw.io vs MermaidViewer: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for draw.io and MermaidViewer side by side. This page compares data; it is not a hands-on review.
On the data: On the data below, draw.io leads on lower entry price. We do not name an overall winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
draw.io
Free, open-source diagramming for any use case
Best for you if:
- • You want a fully free tool (MermaidViewer requires payment)
MermaidViewer
Create Mermaid diagrams from text, code, or AI with live preview
Best for you if:
- • Developers and technical writers who document systems with Mermaid diagrams
| At a Glance | draw.io | MermaidViewer |
|---|---|---|
Starts at | Free plan, paid from $1.70/user/mo, billed monthly Confluence/Jira Cloud plan | Free plan, paid from $6.99/mo, billed monthly Starter plan |
Category | Diagramming Productivity | Diagramming AI Assistants |
Rating | 4.4/5 G2 4.4 452 reviews | n/a |
Free plan | Yes | Yes |
Watch out for | Confluence/Jira Cloud pricing is per user, scales with team size. | n/a |
Choose draw.io or MermaidViewer?
Choose draw.io if
- You want a fully free tool (MermaidViewer requires payment)
- You want completely free
- You want no account required
- Budget matters ($1.70/user/mo, billed monthly vs $6.99/mo, billed monthly)
Choose MermaidViewer if
- Developers and technical writers who document systems with Mermaid diagrams
- You want create Mermaid diagrams from text, code, or AI with live preview
In-Depth Analysis
draw.io
Free, open-source diagramming for any use case
draw.io offers an incredibly generous free tier, making it an excellent value for individual users and small teams.
Watch out
Confluence/Jira Cloud pricing is per user, scales with team size.
Strengths
- Pro: Completely free
- Pro: No account required
- Pro: Works offline
Weaknesses
- Con: Less polished UX
- Con: Limited collaboration
Key features
MermaidViewer
Create Mermaid diagrams from text, code, or AI with live preview
At $0 for export-only, $6.99/month for cloud saves and extra AI credits, and $11.99/month for SVG/PDF export, MermaidViewer is unusually cheap compared to most diagram-as-a-service tools.
Key features
Plans and prices: draw.io vs MermaidViewer
| Tool | Plans and prices | Source |
|---|---|---|
| draw.io |
| diagrams.net read Oct 8, 2026 |
| MermaidViewer |
| mermaidviewer.net/pricing read Oct 9, 2026 |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on draw.io pricing and MermaidViewer pricing.
Key Takeaways
draw.io
- Lower entry price: $1.70/user/mo, billed monthly vs $6.99/mo, billed monthly
MermaidViewer
- Choose if you want create Mermaid diagrams from text, code, or AI with live preview
What the data shows
On the data below, draw.io leads on lower entry price. We do not name an overall winner for this pair.
- Only draw.io has a published user rating (4.4/5 from 452 reviews); MermaidViewer has none we can show.
- draw.io has the lower entry price: $1.70/user/mo, billed monthly (Confluence/Jira Cloud) against $6.99/mo, billed monthly (Starter) for MermaidViewer.
- Both have a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do draw.io and MermaidViewer compare in 2026?
On the data below, draw.io leads on lower entry price. We do not name an overall winner for this pair. Only draw.io has a published user rating (4.4/5 from 452 reviews); MermaidViewer has none we can show. draw.io has the lower entry price: $1.70/user/mo, billed monthly (Confluence/Jira Cloud) against $6.99/mo, billed monthly (Starter) for MermaidViewer. Both have a free plan.
What are draw.io and MermaidViewer used for?
draw.io: Free, open-source diagramming for any use case. MermaidViewer: Create Mermaid diagrams from text, code, or AI with live preview.
What does draw.io cost vs MermaidViewer?
draw.io's cheapest paid plan is Confluence/Jira Cloud at $1.70/user/mo, billed monthly. MermaidViewer's cheapest paid plan is Starter at $6.99/mo, billed monthly; it also has a free plan. Prices read on the vendors' pricing pages, latest check Oct 9, 2026.
What's the main difference between draw.io and MermaidViewer?
draw.io's main strength: completely free. MermaidViewer focuses on create Mermaid diagrams from text, code, or AI with live preview.