Magento EOL

EOQ: End of Quality Fixes.
EOL: End of Security Fixes/End of Software Support

Magento Minor Version	Release	EOQ	EOL
2.0	November 2015	March 2018	March 2018
2.1	June 2016	June 2019	July 1, 2019
2.2	September 2017	December 2019	December 2019
2.3	November 2018	July 2021	April 28, 2022
2.4	July 2020

Notes:

1. Information taken regularly from the Magento Software Lifecycle Policy document

Supported Software

PHP

Magento Minor Version	PHP 5.5	PHP 5.6	PHP 7.0	PHP 7.1	PHP 7.2	PHP 7.3	PHP 7.4	PHP 8.0	PHP 8.1
2.0	✓	✓	✓	✗	✗	✗	✗	✗	✗
2.1	✗	✓	✓[1]	2.1.16+	✗	✗	✗	✗	✗
2.2	✗	✗	✓[2]	✓	2.2.10+	✗	✗	✗	✗
2.3	✗	✗	✗	✓[3]	Until 2.3.6-p1	2.3.3 - 2.3.6[4]	2.3.7+	✗	✗
2.4	✗	✗	✗	✗	✗	Until 2.4.1[4]	Until 2.4.55	✗5	2.4.4+

Notes:

1. Only 7.0.2 and ~7.0.6 for 2.1.0-2.1.1. Starting with 2.1.2 that was expanded to include 7.0.4.
2. 7.0.2, 7.0.4, and ~7.0.6 for 2.2.0-2.2.4. Starting with 2.2.5 7.0 support was limited to ~7.0.13
3. Supports ~7.1.3
4. The composer.json in 2.3.7, 2.4.1, and 2.4.2 appears to support 7.3, however the System Requirements does not list it as a supported version. This likely means it can work, but you'll be on your own.
5. Adobe has announced they're removing 7.3 in 2.4.4. This likely means that 2.4.4 will be semi-compatible with 7.4 and 8.0, though it is targeting 8.1.

Composer

Magento Minor Version	1	2
2.0	✓	✗
2.1	✓	✗
2.2	✓	✗
2.3	Until 2.3.7[1]	2.3.7+
2.4	Until 2.4.2[1]	2.4.2+

Notes:

1. Composer 1 still works with Magento 2.3.7 and 2.4.2, but is no longer supported.

Elasticsearch

Magento Minor Version	ES 1.x	ES 2.x	ES 5.x	ES 6.x	ES 7.4.x	ES 7.6.x	ES 7.9.x	ES 7.10.x
2.1	✓1	✓2	2.1.13	✗	✗	✗	✗	✗
2.2	Until 2.2.84	✓	2.2.8+	2.2.8+	✗	✗	✗	✗
2.3	✗	Until 2.3.5	Until 2.3.5	✓	2.3.5+	✗	2.3.7+	✗
2.4	✗	✗	✗	✗	2.4.2+6	2.4.0-2.4.15	2.4.2+	2.4.4+

Notes:

1. Versions 2.1.1-2.1.2 declare support for all 1.x, but all other 2.1.x versions only declare support for 1.7
2. Version 2.1.0 only declares support for 2.0 and 2.1. All other lines claim support for 2.x
3. Version 2.1.1 is the only version in the 2.1.x line to declare support for ES 5, and then only for 5.0
4. 2.2.0-2.2.7 declare support for ES 1.7
5. 2.4.0 specifically declares support for ES 7.6.x
6. 2.4.2 states "Magento 2.4.x remains compatible with Elasticsearch 7.4.x" despite compatibility not being declared at any point

Opensearch

Magento Minor Version	OS 1.x
2.4	2.4.4+

RabbitMQ

Magento Minor Version	3.5	3.7	3.8
2.0	✓	✗	✗
2.1	✓	✗	✗
2.2	✓	✓	✗
2.3	✗	Until 2.3.5	✓
2.4	✗	✗	✓

Redis

Magento Minor Version	2.4	3.0	3.2	4.x	5.x	6.0
2.0	✗	✓	✗	✗	✗	✗
2.1	✓	✓	✓	2.1.17+	2.1.17+	✗
2.2	✓	✓	✓	✗	✗	✗
2.3	Until 2.3.6	Until 2.3.6	Until 2.3.6	2.3.1 - 2.3.5	2.3.1 - 2.3.6	2.3.7+
2.4	✗	✗	✗	✗	2.4.0 - 2.4.1	2.4.2+

Varnish

Magento Minor Version	3.5	4.x	5.x	6.x
2.0	✓	✓	✗	✗
2.1	✓	✓	✗	✗
2.2	✗	✓	✓	✗
2.3	✗	✓	✓1	✓2
2.4	✗	✗	✗	✓3

Notes:

1. Magento declares support for 5.2+
2. Magento declares support for 6.2+, 6.5.1 explicitly supported with 2.3.7
3. Tested with 6.3.1. Magento 2.4.2 tested with 6.4

Databases

MySQL

Magento Minor Version	5.6	5.7	8.0
2.0	✓	✗	✗
2.1	✓	2.1.2+	✗
2.2	✓	✓	✗
2.3	✓1	✓	✗
2.4	✗	✓1	✓

Notes:

1. Magento is also compatible with, but has not been tested and is not recommended

MariaDB

Magento Minor Version	10.0	10.1	10.2	10.3	10.4	10.5
2.0	✓	✓	✗	✗	✗	✗
2.1	✓	✓	2.1.2+	✗	✗	✗
2.2	✓	✓	✓1	✓1	✓1	✗
2.3	✓1	✓1	✓1	✓1	✓1	✗
2.4	✗	✗	✓2	✓2	✓2	✓

Notes:

1. Magento only uses MySQL features compatible with MariaDB. MariaDB may not be compatible with all MySQL features, however, so be sure to research compatibility issues before using a feature in your Magento module.
2. Magento is also compatible, but has not been tested and is not recommended