Mermaid
A text-based tool for creating diagrams and charts that integrate with your development workflow
- Also known as
- mermaid
Available worldwide
What is Mermaid?
An open-source JavaScript library that lets developers create diagrams using simple text syntax, keeping documentation synchronized with code and enabling diagrams to be embedded in code and reviewed like regular diffs.
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.
What Mermaid does
The capabilities that matter for diagramming, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Deployment model
- Cloud saas
- Uml and erd logic enforcement
- ✓
- Bpmn business process modeling standard
- ✓
- Aws azure automated cloud architecture import
- -
- Data linked shapes excel sync
- -
- Visio vsdx file import export
- -
- Collaborative multiplayer real time editing
- -
- Confluence jira atlassian embeds
- -
- Google workspace office 365 sync
- -
- Slack ms teams chat embeds
- -
- SOC2 type ii
- -
- ISO 27001
- -
- Pricing model
- -
Platform & deployment
Independently observed- Web
- Cloud / SaaS
- Self-hosted
Integrations (3)
Independently observed- GitHub
- GitLab
- Obsidian
Security & compliance
Known vulnerabilities: 16 (9 in the last 12 months), max severity HIGH sourcea count reflects scale & disclosure, not quality
Mermaid FAQ
Common questions about Mermaid, answered from independent, dated evidence.
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. It is indexed under Diagramming.
Source: https://mermaid.js.org
Is Mermaid free to use?
Mermaid is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.
Source: https://mermaid.js.org
What platforms does Mermaid support?
We have confirmed browser-based access to Mermaid. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.
Source: https://mermaid.js.org
Is Mermaid open source?
Yes. Mermaid is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.
Mermaid alternatives
Other diagramming we track, ranked by the same independent score.
- GliffyAn AI-powered diagramming solution for Confluence enabling teams to create technical diagrams collaborativelymedium · 54%
- CreatelyVisualize your business processes and collaborate with AI agents in real-timemedium · 51%
- Lucidchartlow · 38%
- PlantUMLOpen-source diagramming tool for teams to create technical diagrams and software documentationlow · 42%
- CacooA collaborative visual workspace where teams can create and organize diagrams, wireframes, and flowcharts togetherlow · 30%
- yEd Graph EditorA software development kit for creating interactive diagrams and network visualizationslow · 26%
Compare Mermaid
Side by side against other diagramming, attribute by attribute, with a source on every value.
The vioscaleAI 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 | ✓ |
| Capabilities | 46 | 0.07 | 3.2 | ✓ |
| Security score | 67 | 0.04 | 2.8 | ✓ |
| Stars | 94 | 0.03 | 2.4 | ✓ |
| Integrations | 17 | 0.08 | 1.4 | ✓ |
| Release cadence | 0 | 0.05 | 0.0 | - |
| Security posture | 5 | 0.06 | 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 · 2026-10-14 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 4 items | mediumsource · 2026-09-10 · 69% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Deployment model: cloud_saas · Uml and erd logic enforcement: Yes · Bpmn business process modeling standard: Yes | mediumsource · 2026-10-14 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 3 | mediumsource · 2026-10-14 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | TypeScript | highsource · 2026-10-14 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | MIT | highsource · 2026-10-14 · 95% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-10-14 · 75% |
Pricing
Release
| Attribute | Value | Evidence |
|---|---|---|
| History | 20 items | mediumsource · 2026-10-14 · 70% |
Security
| Attribute | Value | Evidence |
|---|---|---|
| Disclosure policy | Yes | mediumsource · 2026-08-20 · 60% |
| Scorecard | 6.7 | highsource · 2026-10-14 · 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 · 2026-10-14 · 90% |
Is Mermaid the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank Mermaid against the rest of the diagramming we index, using the same dated evidence weighted your way.
Free to run, no account needed to start. How the evaluation works
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