Kai vs Kerna
Kai
hirekai.aiKerna
kerna.ioSide by side
| Figure | Kai | Kerna |
|---|---|---|
| Price from | $20/mo | €12/mo |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| Plans published | 3 | 5 |
| Spec score · AI Email Assistants | 8.3 (#10) | 8.3 (#11) |
| Headquarters | Zürich, Switzerland | Katowice, Poland |
| Intended users | Kai presents itself for founders and executives, freelancers and solopreneurs, teams, AI power users, and people with ADHD. | Kerna describes itself as email automation for professionals and offers team plans for collaboration and larger organizations. |
| Product | Kai describes itself as an AI executive assistant that tracks email, meetings, and direct messages and follows up on commitments. | Kerna is an AI email assistant that works inside Gmail and Outlook. |
| Security | Morgen says it uses access controls, authentication, transport encryption, monitoring, rate limiting, logging, least-privilege access, and vendor security reviews. | The trust page reports TLS 1.2 or higher in transit and AES-256 encryption at rest in Firestore. |
Plans
Kerna
- StarterFree
- Standard€12 a month
- Pro€22 a month
- Business€69 a month
- Enterprise€499 a month
In their own words
Kerna
Kerna is an AI email assistant for Gmail and Outlook on macOS, Windows, and the web. At a user’s request, it sorts open messages into categories such as Urgent, Respond, Invoice, Waiting, and Notification; users can also set custom categories and industry taxonomies. It drafts replies based on the full thread, with controls for intent and tone, and makes structured thread summaries for conversations of up to 50 messages. It can summarize attachments, extract selected fields into exportable tables, and translate inbound messages and outbound replies in 45 languages. Integrations include Calendar, Contacts, and Sheets as well as Gmail and Outlook. Kerna says it acts only when a user initiates a request, processes content in memory, discards it afterward, and redacts personal data before it reaches the inference provider. Its trust information reports TLS 1.2 or higher in transit and AES-256 encryption at rest. Kerna has a free plan; paid plans start at €12/mo. Outlook requires a Microsoft-hosted mailbox; POP or IMAP and on-premises Exchange are unsupported.