Pricing · 2026
KaiMail pricing
4 plans on the record · a free plan
Every plan
KaiMail Basic
Free
Free
1 custom domain · 1 mailbox · 300 emails/month max · 1MB max email size · 1 day logs retention
Read 8 Oct 2026 · kaimail.net
KaiMail Plus
¥550 a month
¥550 /month (inc. tax)
2 custom domains · 5 mailboxes · 5k emails/month max · 10MB max email size · 7 days logs retention · SMTP sending (500/month)
Read 8 Oct 2026 · kaimail.net
KaiMail Pro
¥1,650 a month
¥1650 /month (inc. tax)
10 custom domains · 20 mailboxes · 10k emails/month max · 25MB max email size · 30 days logs retention · SMTP sending (1,000/month)
Read 8 Oct 2026 · kaimail.net
KaiMail Business
¥5,500 a month
¥5500 /month (inc. tax)
50 custom domains · Unlimited mailboxes · 50k emails/month max · 35MB max email size · 30 days logs retention · SMTP sending (2,000/month) · Priority support
Read 8 Oct 2026 · kaimail.net