
Excalidraw
Graphviz
PlantUML
Diagrams
asciiflow
Mermaid
SequenceDiagram.org
Creates diagrams from textual descriptions! It provides a unified API with support for BlockDiag, BPMN, Bytefield, C4 (with PlantUML), Ditaa, Erd, GraphViz, Mermaid, Nomnoml, PlantUML, SvgBob, UMLet, Vega, Vega-Lite, WaveDrom

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Which is more popular?
Based on our record, Kroki seems to be more popular. It has been mentioned 39 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | kroki.io | opalstack.com |
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What each product offers, as listed by its team.


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An editorial look at what each product does well and who it suits.


No analysis of Kroki yet.
Overall verdict
Why this product is good
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Walkthroughs and reviews on video.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Kroki and Opalstack. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Https://kroki.io/#try Shout out to Kroki, which offers Mermaid and many other text-based diagramming formats. - Source: Hacker News / 2 months ago
The CLI sends the block to Kroki, gets back an image, and saves it locally. After committing the image to your assets repo, dev push replaces the code block with an image link pointing to GitHub — dev.to never sees the mermaid source.... - Source: dev.to / 7 months ago
In this blog post, we will implement a custom section helper that allows to invoke a Kroki.io server to generate images from almost every possible diagram as code language. - Source: dev.to / about 1 year ago
Tracking Opalstack since Sep 2023.
When comparing Kroki and Opalstack, you can also consider the following products.

Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.
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Graphviz is open source graph visualization software. It has several main graph layout programs.
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PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
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Diagrams lets you draw the cloud system architecture in Python code. It was born for prototyping a new system architecture without any design tools. You can also describe or visualize the existing system architecture as well.
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Infinite ASCII diagrams, save to Google Drive, resize, freeform draw, and export straight to text/html.
Compare asciiflow to Kroki or Opalstack:

Create diagrams and visualizations using text and code.
Compare Mermaid to Kroki or Opalstack: