Spike
Turns your inbox into a continuous, conversational chat.
Spike strips out the headers, signatures and repeated formalities of traditional email and presents each thread as a chat conversation: bubbles, instant replies and real-time presence. The result feels like WhatsApp or iMessage, but interoperates with any email address.
It works on top of your existing account (Gmail, Outlook, iCloud or IMAP), so you don't need to change addresses. It supports multiple accounts unified in a single inbox, collaborative notes, tasks, video calls and "Magic AI" for drafting and summarising messages.
Its Priority Inbox automatically separates what matters from the noise, and the team features (channels, groups and shared inboxes) make it a lightweight Slack alternative for small teams.