ImprovMX
6.8#3 in email forwarding servicesFrom $4.17 a monthFree planWebAPI
VisitImprovMX vs KaiMail
What both publish
| Fact | ImprovMX | KaiMail |
|---|---|---|
| Integrations | The maker provides SMTP setup guides for Gmail, Apple Mail, and Thunderbird, and DNS configuration guides for providers including Cloudflare, Namecheap, DigitalOcean, Vercel, and Netlify. | The webhook page describes connecting email events to ticketing systems, Slack notifications, CRM updates, and other HTTP actions. |
| Intended users | ImprovMX says more than 200,000 users and organizations use it for business, internal tools, and side projects. | KaiMail describes itself as developer-first email forwarding for developers and teams. |
| Product | ImprovMX provides email forwarding for custom domains, with options to send and receive domain email. | KaiMail provides email forwarding and sending using customers’ own custom domains. |
| Security | ImprovMX says it conducts annual independent penetration tests, uses TLS in transit for SMTP connections that support it, and encrypts stored data at rest. | The privacy policy lists TLS encryption in transit, ARC/DKIM email authentication, account access controls, and regular security reviews. |
| Support | Free includes standard email and chat support; Premium and Pro include priority email and chat support, while Enterprise lists support SLAs and a dedicated account manager. | The terms state that support is provided exclusively via email. |
ImprovMX plans
- FreeFree
- Premium$9 a month
- Pro$24 a month
- Light$50 a year
- EnterprisePriced on request
KaiMail plans
- KaiMail BasicFree
- KaiMail Plus¥550 a month
- KaiMail Pro¥1,650 a month
- KaiMail Business¥5,500 a month
Pick ImprovMX if…
ImprovMX suits people who want custom-domain forwarding, routing rules, or programmatic domain and alias management. It can also fit users who need to send from a custom domain, provided they choose a plan with SMTP sending.
Pick KaiMail if…
KaiMail suits developers and teams that need custom-domain forwarding, outbound email, or webhook delivery. It is best suited to users comfortable configuring DNS and HTTP integrations.