Curated Collection
Open-source Comms · Open-source
This page picks 6 open-source / source-available Email & Comms, ranked by overall rating and price, with an average rating of 7.2 / 10. 5 of them are friendly for mainland China access (CN ≥ 2 stars). Headquarters: United States / Finland / 开源项目. 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.
Category
✉ All Comms
Open-source Comms Top 6
Sorted by this dimension, recalibrated monthlyAll 6 Open-source Comms compared
Click a provider name for the full review| # | Provider | Sub-category | HQ | Monthly | Rating | CN | Payment | Visit |
|---|---|---|---|---|---|---|---|---|
| 1 |
 dovecot.org |
邮件服务器 | Finland | Free / Contact | 9.0 | — | Visit | |
| 2 |
 mutt.org |
邮件客户端 | United States | Free / Contact | 8.0 | — | Visit | |
| 3 |
 aerc-mail.org |
邮件客户端 | 开源项目 | Free / Contact | 7.0 | — | 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 |
M madmesh.net |
无线电通信 | United States | Free / Contact | 6.0 | — | Visit |
Other angles on Comms:
💰 Cheap Comms →
🆓 Free Comms →
🇨🇳 China-friendly Comms →
💰 Alipay Comms →
🏠 Self-host Comms →
🔗 API Comms →
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Other categories · same "Open-source"
🖥 VPS →
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🔌 Proxies →
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⚙ SaaS →
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🔧 Dev Tools →
💰 Crypto →
📈 Marketing →
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.