ChartAI
Verified Oct 15, 2026 ActiveChat interface that turns a description into a Mermaid diagram, sold as credits where one credit is one diagram.
Listed on EffectHub ·
Pricing
- Pricing model
- Paid
- Paid options from
- $5 once
- Billing
- One-time purchase
A one-time Credit Pack is $5 for 25 diagram generations that never expire; Pro is $24/month for unlimited generations under a fair-use cap, with priority support. Edits and restyles count as generations, refunds are offered within 7 days, and no free allowance is stated on the pricing page.
Use tool ↗About ChartAI
ChartAI is a chat window for diagrams: you describe a flowchart, Gantt chart, entity-relationship diagram or sequence diagram in plain language and it renders it with Mermaid, then lets you edit it in place, restyle it with colour themes and export it as high-resolution PNG or SVG. Because the output is Mermaid, the diagram source can be kept and edited as text elsewhere. Billing is either a one-time pack of 25 generations that never expire or a monthly Pro plan with unlimited generations under a fair-use cap. The operator named in the footer is Neural Canvas Inc.
- Platforms
- Web
- API
- Not confirmed
- Last verified
- Oct 15, 2026
Verified sources
- Pricing page: Credit Pack $5 once for 25 diagrams, credits never expire; Pro $24/month with unlimited generations (fair use); © 2026 Neural Canvas Inc. (15 October 2026)chartai.io ↗
- Pricing page FAQ: each credit is one generated diagram, edits and restyles count as generations, full refund within 7 days (15 October 2026)chartai.io ↗
- Home page metadata: 'ChatGPT for charts and diagrams', Mermaid stylesheet and an AdSense account tag (15 October 2026)chartai.io ↗
Is ChartAI legit?
We don’t label tools safe or unsafe. Below are the records we checked ourselves, each with the date we read it.
- TLS certificate
- Issued by Let's Encrypt, valid until Dec 18, 2026Seen in our own connection to the site on Oct 15, 2026
- Last checked
- Oct 15, 2026The site answered
- Operated by
- Neural Canvas Inc.Our research, card verified Oct 15, 2026
Pros & cons of ChartAI
The pricing is the clearest thing about it: $5 once for 25 diagrams that never expire, or $24 a month for unlimited use, with Mermaid output you can keep and edit elsewhere. Against that, the app is a lightly reskinned chat client with ad-network tags on the page, and the vendor's country and support arrangements are barely documented.
Pros
- One credit equals one diagram, and one-time credits never expire
- Pro removes the per-diagram meter for $24 a month
- Renders Mermaid, so output can be exported and edited as text
- PNG and SVG export with in-place edits and colour themes
Cons
- The interface is a generic chat client shell with little diagram-specific tooling
- The page carries ad-network tags, which is unusual for a paid product
- No company address or country disclosed - only an Inc. name in the footer
- No public API, collaboration features or version history found
Best for
- Students and occasional users who need a handful of diagrams without a subscription
- Anyone who wants Mermaid source they can paste into docs or a README
- People who present weekly and want unlimited flowcharts and sequence diagrams
Not for
- Teams needing shared workspaces, comments, or version history
- Diagrams that must follow a house style or brand template
Watch out: Edits and restyles each spend a credit on the one-time pack, so 25 credits can mean far fewer than 25 finished diagrams.
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ChartAI head-to-head
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