Kerna

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

WeightsClosed

About

Kerna is ranked #6 of 46 in AI email assistants on Inferse. It runs on macOS, Web, Windows. There is a free plan. Paid plans start at €12/mo.

Compared on AI email assistants

Free plan: Yeskerna.io

Facts

Product: Kerna is an AI email assistant that works inside Gmail and Outlook.kerna.io · 29 Sept 2026
Inbox triage: On request, Kerna sorts open messages into Urgent, Respond, Invoice, Waiting and Notification, with custom categories and industry taxonomies available.kerna.io · 29 Sept 2026
Email drafting: Kerna drafts context-aware replies using the full thread history and lets users choose an intent and tone.kerna.io · 29 Sept 2026
Summaries: Kerna creates structured summaries of email threads, with the About page specifying threads of up to 50 messages.kerna.io · 29 Sept 2026
Attachments: Kerna summarizes attachments and extracts selected fields into tables that can be exported to files.kerna.io · 29 Sept 2026
Languages: Kerna offers translation in 45 languages for inbound messages and outbound replies.kerna.io · 29 Sept 2026
Integrations: Kerna integrates with Gmail, Outlook, Calendar, Contacts and Sheets, and the pricing page lists shared mailboxes for Outlook.kerna.io · 29 Sept 2026
User control: Kerna says it only processes content when a user initiates an action and does not scan the inbox in the background.kerna.io · 29 Sept 2026
Privacy: Kerna says email content is processed in memory and discarded after the request, with personal data redacted before content reaches the inference provider.kerna.io · 29 Sept 2026
Security: The trust page reports TLS 1.2 or higher in transit and AES-256 encryption at rest in Firestore.kerna.io · 29 Sept 2026
Assurance: Kerna reports CASA Tier 2 validation for its Gmail add-on and describes Microsoft Publisher Attestation as a self-assessment, not an independent verification or Microsoft 365 Certification.kerna.io · 29 Sept 2026
Outlook requirements: Outlook requires a Microsoft-hosted mailbox; POP or IMAP connections and on-premises Exchange mailboxes are unsupported.kerna.io · 29 Sept 2026
Intended users: Kerna describes itself as email automation for professionals and offers team plans for collaboration and larger organizations.kerna.io · 29 Sept 2026