MailMaestro vs Spike

MailMaestro is an AI email assistant for drafting, revising, and organizing professional email. It writes messages from scratch, polishes drafts, fixes typos, and summarizes email threads and attachments; those summaries can inform generated responses. Rapid Replies offers contextual response options that users can turn into a professional reply, and the assistant can create professional responses in 18 languages. It detects meeting invitations, checks availability in Microsoft Outlook or Gmail calendars, and enables one-click responses. Users can share thread summaries in Microsoft Teams channels or direct messages. Magic templates and keyword shortcuts help with repetitive messages and commonly inserted details. MailMaestro is available as an extension and on the web. Its Gmail version is a Chrome extension and works only in Google Chrome; its Outlook version works with Outlook web, legacy Outlook, and new Outlook. The free plan limits Compose, Reply, and Improve to three uses per week. The Professional/Team plan is $15 a month per seat, and MaestroDuo is $27 a month per seat. Maestro Labs says customer data is not used to train AI models and is encrypted at rest and in transit.

Spike combines email, calls, notes, tasks, and to-dos in a single hub, and presents email threads as chat-like conversations. It has a unified inbox, scheduled sending, and calendar tools, and runs on Android, iOS, macOS, web, and Windows. Spike AI can draft messages and replies, summarize conversations, and provide an assistant; free tiers list 10 queries for several AI features. Teamspace adds channels, shared inboxes, groups, collaborative documents and tasks, and audio and video meetings. Spike works with existing accounts such as Gmail, Office 365 or Outlook, Exchange, iCloud, Yahoo, and other IMAP accounts. Cloud attachments can use Google Drive, Dropbox, or OneDrive, and calendars can connect with Google Calendar, Outlook, and Apple Calendar. Spike says it encrypts messages with AES-256 using a per-message private key, and undergoes periodic external security audits. The Email App Free plan includes one address, 60 days of search history, 1 GB storage, and 30 MB file uploads. Email App Pro is $6 a month billed annually; Ultimate is $12 a month billed annually.