This page picks 7 self-hostable / private deployment Email & Comms, ranked by overall rating and price, with an average rating of 7.1 / 10. 5 of them are friendly for mainland China access (CN ≥ 2 stars). Headquarters: United States / Germany / Finland / United Kingdom. Data is compiled from public sources plus editorial testing, cached and refreshed every 5 minutes; compare specs and jump straight to official sites in the table below.
| # | Provider | Sub-category | HQ | Monthly | Rating | CN | Payment | Visit |
|---|---|---|---|---|---|---|---|---|
| 1 |
dovecot.org |
邮件服务器 | Finland | Free / Contact | 9.0 | — | Visit | |
| 2 |
element.io |
即时通讯协作 | United Kingdom | Free / Contact | 8.0 | — | Visit | |
| 3 |
teamspeak.com |
语音通信 | Germany | Free / Contact | 8.0 | — | Visit | |
| 4 |
afterlogic.org |
Webmail 邮件客户端 | United States | Free / Contact | 7.0 | — | Visit | |
| 5 |
S squirrelmail.org |
Webmail邮箱客户端 | United States | Free / Contact | 6.0 | — | Visit | |
| 6 |
A askozia.com |
VoIP电话系统 | Germany | Free / Contact | 6.0 | — | Visit | |
| 7 |
S spreadhub.com |
桌面通知告警 | United States | Free / Contact | 6.0 | — | Visit |
Picks are sorted by public ratings and fields, not purchase advice; prices per the official site. This page contains affiliate links (rel="sponsored"). The full Comms list is in the directory; rating basis is on the methodology page.