
MarkLogic Server
Datomic
Valentina Server
Datahike
Matisse
Oracle TimesTen
SAP MaxDB
Easily develop rich applications using a fully managed, scalable, and serverless document database.

SQL Fiddle
DB Fiddle
Online SQL Editor
Rextester
Online SQL playground for testing and sharing SQL snippets. SQLite, MySQL and PostgreSQL.

Which is more popular?
Based on our record, Firestore seems to be more popular. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | cloud.google.com | extendsclass.com |
| Company | — | 2022 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Firestore yet.
It is a SQL playground which allows to test SQL online. Run SQL queries for SQLite, MySQL and PostgreSQL databases. Share snippets.
What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of ExtendsClass SQL Online yet.
Walkthroughs and reviews on video.
Firestore v10: Setup & Free Tier in 4 Mins (2026)
More videos
No ExtendsClass SQL Online videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


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


Firestore for Inbox, Outbox, and Distributed Lock. - Source: dev.to / 12 months ago
Your app must be stateless. Don't use embedded databases. When your users hit your app again, they may be reaching another instance in a completely different state. Persist data in cloud-based storage like GCS, Cloud SQL, or Cloud... - Source: dev.to / almost 2 years ago
Google Firestore is a serverless document database providing direct web, IoT, and mobile app development access. It’s highly scalable with no maintenance window and zero downtime. - Source: dev.to / about 2 years ago
Tracking ExtendsClass SQL Online since Oct 2022.
When comparing Firestore and ExtendsClass SQL Online, you can also consider the following products.

MarkLogic Server is a multi-model database that has both NoSQL and trusted enterprise data management capabilities.
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A tool for easy online testing and sharing of database problems and their solutions.
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The fully transactional, cloud-ready, distributed database
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An online tool for testing, sharing and collaborating on SQL snippets
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Valentina Server is 3 in 1: Valentina DB Server / SQLite Server / Report Server
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Free Online SQL Editor
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