IssueSYNC is on marketpalce IssueSYNC is on marketplace since Jira 6.0 . It shares same architecture across Jira versions and preserve and preserves backward compatibility most of core features.
It is also applies for IssueSYNC v1 and v2 but of course v2 has more features which you cannot use when synchronizing with v1IssueSYNC will work across different Jira versions and plugin versions.
| Jira version | IssueSYNC version | Jira version | IssueSYNC version | |
|---|---|---|---|---|
| 6.0.8 | 1.3.4-j60 | ↔ | 6.4.14 | 1.4.2-j64 |
| 6.0.8 | 1.3.4-j60 | ↔ | 7.13.1 | 2.8 |
| 6.4.14 | 1.4.2-j64 | ↔ | 7.2.4 | 2.8 |
| 7.11.2 | 2.3.2 | ↔ | 7.11.2 | 2.8 |
| 7.2.4 | 1.7.3 | ↔ | 7.2.4 | 2.8 |
| CLOUD | N/A | ↔ | 7.11.2 | 2.8 |
| 7.2.4 | 2.5.2 | ↔ | CLOUD | N/A |
*If you are looking for Jira Service Desk version please look at a matrix, which explains which Jira SD version matches Jira Core version - https://confluence.atlassian.com/adminjira/jira-applications-compatibility-matrix-875304597.html.