
draw.io
OmniGraffle
yEd
Miro
Gliffy
Visio
PlantUML
LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.

aiDoks.eu
InvoiceIn
Mustang Project
E-Rechnungs-Studio.de
E-Invoice.Space
Invoice-Converter
GetInvoice
REST API for German e-invoices: generate XRechnung (UBL/CII) and ZUGFeRD from JSON, and validate XML and PDF invoices against the official KoSIT rule set, with a plain-language explanation for every business-rule finding. Validation is free.

Which is more popular?
Based on our record, LucidChart seems to be more popular. It has been mentioned 5 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | lucidchart.com | normapi.com |
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| Company | Startup from the United States | — |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of LucidChart yet.
NormAPI generates XRechnung (UBL and CII) and ZUGFeRD invoices from JSON and validates XML and PDF invoices against the official KoSIT rule set, as a REST API and as a free browser validator without sign-up. Generated invoices are validated before they are returned, every response names the...
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No analysis of NormAPI yet.
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Data Analysis topicsData Analysis topicsData Analysis topicsData Analysis topics7 free database diagramming tools for busy data folks1. Diagrams.netHow it worksWhy it's free2. dbdiagramHow it worksWhy it's free3. ERD...
If you’re prototyping, teaching, or diagramming casually, free data modeling software like ERD Plus, QuickDBD (free tier), or Creately (free plan) may cover your needs. But for production systems, audits, or CI/CD...
Lucidchart is another cloud-based tool tailored for creating detailed database diagrams online. As a web-based application, it offers accessibility from anywhere and also provides dedicated apps for Android and iOS....
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Recommendations tracked on public social media and blogs since March 2021.


I'm thinking something like a lucidchart.com set up, but also wondering since one project is complete if there is anything that can just analyze an existing codebase and automatically do the work for me. Source: almost 5 years ago
Oh! excalidraw.com is great for quick paper style diagrams. I have used it a fair bit. The roam integration is good. But I always revert back to draw.io because it's open sourced, simple to use and just works :D If you are looking for... Source: almost 5 years ago
You could try lucidchart.com or draw.io. I have used both. Source: over 5 years ago
Tracking NormAPI since Oct 2026.
When comparing LucidChart and NormAPI, you can also consider the following products.


Create, edit and view e-invoices online for free. Convert PDF to e-invoice, transform invoice XML to PDF, and generate UBL 2.1 with OCR scanning, EU VAT validation, and PEPPOL BIS 3.0 compliance.
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OmniGraffle is for creating precise graphics like website wireframes, an electrical system designs, or mapping out software class.
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POST any e-invoice you receive. Get canonical EN 16931 JSON, validation with fix hints, PDF, CSV and DATEV back. Nothing stored.
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yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.
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Mustangproject is a open source library and command line tool for FacturX/ZUGFeRD, a PDF-based format for electronic invoices.
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