
Mem0
Memori
Agentmemory
Supermemory
Tempreon
cognee
TheSecondBrain.dev
Portable, verifiable memory for AI agents — works across ChatGPT, Claude, Gemini and any MCP client

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?
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | chainmemory.ai | extendsclass.com |
| Pricing | — | |
| Company | — | 2022 |
| Listed in |
In their own words, as submitted to SaaSHub.


ChainMemory gives your AI agents persistent memory that belongs to YOU — not to a single vendor. Save a memory in ChatGPT, recall it in Claude or Gemini. Available via Chrome extension, MCP server (npm), or REST API. Every memory gets a cryptographic fingerprint and project states are anchored...
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.


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.
How often each product is chosen within a category, 0–100% relative to the other.


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

Your private, local memory layer for all AI tools
Compare Mem0 to ChainMemory or ExtendsClass SQL Online:

A tool for easy online testing and sharing of database problems and their solutions.
Compare SQL Fiddle to ChainMemory or ExtendsClass SQL Online:

Persistent memory from agent trace, not just conversation
Compare Memori to ChainMemory or ExtendsClass SQL Online:

An online tool for testing, sharing and collaborating on SQL snippets
Compare DB Fiddle to ChainMemory or ExtendsClass SQL Online:

Persistent memory for Claude Code, Codex & coding agents
Compare Agentmemory to ChainMemory or ExtendsClass SQL Online:

Free Online SQL Editor
Compare Online SQL Editor to ChainMemory or ExtendsClass SQL Online: