What is Mermaid?
A tool that lets users quickly create detailed diagrams, flowcharts, and visualizations by writing simple text-based syntax, accessible to both programmers and non-technical users.
Mermaid pricing
We don't have Mermaid's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
Platform & deployment
Independently observed- Web
Integrations (1)
Independently observed- GitHub
Security & compliance
Known vulnerabilities: 16 (9 in the last 12 months), max severity HIGH sourcea count reflects scale & disclosure, not quality
Mermaid alternatives
Other diagramming we track, ranked by the same independent score.
- GliffyCreate and collaborate on diagrams directly within Confluence without leaving the platformmedium · 56%
- yEd Graph EditorCreate professional diagrams effortlessly with automatic layoutlow · 25%
- CreatelyVisual workspace for creating diagrams and collaborating with teams in real timelow · 45%
- LucidchartCreate professional diagrams with artificial intelligence and real-time collaborationlow · 26%
- CacooA collaborative visual workspace where teams can create and organize diagrams, wireframes, and flowcharts togetherlow · 26%
- PlantUMLlow · 11%
Compare Mermaid
Side by side against other diagramming, attribute by attribute, with a source on every value.
The Vioscale score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Mermaid, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Development activity | 63 | 0.09 | 5.9 | ✓ |
| Dependent projects | 69 | 0.06 | 4.3 | ✓ |
| Security score | 67 | 0.04 | 2.8 | ✓ |
| Stars | 94 | 0.03 | 2.4 | ✓ |
| Integrations | 9 | 0.07 | 0.6 | ✓ |
| Capabilities | 0 | 0.08 | 0.0 | - |
| Release cadence | 0 | 0.05 | 0.0 | - |
| Security posture | 5 | 0.07 | 0.0 | - |
| Package downloads | 0 | 0.14 | 0.0 | - |
| Developer Q&A activity | 0 | 0.06 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 100 | mediumsource · 2026-08-26 · 65% |
Adoption
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 1 | mediumsource · 2026-08-20 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | TypeScript | highsource · 2026-08-26 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | MIT | highsource · 2026-08-26 · 95% |
Pricing
Release
| Attribute | Value | Evidence |
|---|---|---|
| History | 20 items | mediumsource · 2026-08-26 · 70% |
Security
| Attribute | Value | Evidence |
|---|---|---|
| Disclosure policy | Yes | mediumsource · 2026-08-20 · 60% |
| Scorecard | 6.7 | highsource · 2026-08-26 · 90% |
| Vulnerabilities | Count: 16 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=mermaid&per_page=100 · Last 12m: 9 · Max severity: HIGH | highsource · 2026-08-26 · 90% |