
Apache Flink
RisingWave
ClickHouse
OctoSQL
Amazon Kinesis
Timeplus
DeltaStream.io
A Streaming Database for Real-Time Applications

one sec
Freedom.to
Cold Turkey
Forest App
AppBlock
Focus App
FocusMe
Real Focus in Real-Time. Measure and improve your focus day by day, on iPhone, iPad and macOS.

Which is more popular?
Based on our record, Materialize seems to be more popular. It has been mentioned 74 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | materialize.com | opal.so |
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What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
Walkthroughs and reviews on video.
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How often each product is chosen within a category, 0–100% relative to the other.


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


Did I miss in the article where OP reveals the magic database that actually does this? 3rd party solutions like https://readyset.io/ and https://materialize.com/ exist specifically because databases don’t actually have what we all want... - Source: Hacker News / about 1 year ago
This triggered some associations for me. Strongest was Cells[0], a library for Common Lisp CLOS. The earliest reference I can find is 2002[1], making it over 20 years old. Second is incremental view maintenance systems like Feldera[2] or... - Source: Hacker News / over 1 year ago
It's hard to write something that is both accessible and well-motivated. The best uses of category theory is when the morphisms are far more exotic than "regular functions". E.g. It would be nice to describe a circuit of live queries... - Source: Hacker News / almost 2 years ago
Tracking Opal.so since May 2025.
When comparing Materialize and Opal.so, you can also consider the following products.

Flink is a streaming dataflow engine that provides data distribution, communication, and fault tolerance for distributed computations.
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one sec uses Shortcut automation in order to empower you to spend more time in the real world.
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RisingWave is a stream processing platform that utilizes SQL to enhance data analysis, offering improved insights on real-time data.
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Freedom is a productivity hack that lets you block apps, websites or the entire Internet on iPhones, iPads, Windows and Mac computers.
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ClickHouse is an open-source column-oriented database management system that allows generating analytical data reports in real time.
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Cold Turkey is a free productivity program that you can use to temporarily block distractions so that you can get your work done!
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