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

Mem0
cognee
Agentmemory
Memori
Supermemory
ChainMemory
OpenMemory
The missing memory layer for AI products.

Which is more popular?
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | extendsclass.com | claiv.io |
| Pricing | — | |
| Company | 2022 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


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


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


No analysis of ExtendsClass SQL Online yet.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using ExtendsClass SQL Online and Claiv Memory. For example, how are they different and which one is better?
When comparing ExtendsClass SQL Online and Claiv Memory, you can also consider the following products.

A tool for easy online testing and sharing of database problems and their solutions.
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Your private, local memory layer for all AI tools
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An online tool for testing, sharing and collaborating on SQL snippets
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Free Online SQL Editor
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Persistent memory for Claude Code, Codex & coding agents
Compare Agentmemory to ExtendsClass SQL Online or Claiv Memory: