Instead of Serif
Serif alternatives
Serif puts an AI employee inside shared addresses, helping small businesses and operations teams manage routine customer and administrative email. It can qualify and route inquiries, answer common questions, collect paperwork, send quotes, and chase unpaid invoices. Connections to Google Workspace and Microsoft 365, optional use of a Serif address, escalation for sensitive messages, and approval controls support a gradual move toward independent handling. Security commitments include SOC 2 Type 2, GDPR, and HIPAA compliance, encrypted assistant data, and no use of emails to train general AI models.
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Mailbutler Smart Assistant
by Mailbutler Smart AssistantFree plan AndroidExtensioniPhone+4AI drafting across Apple Mail, Gmail, and Outlook — Mailbutler focuses on drafting emails and replies across major personal mail apps rather than Serif’s shared-address workflows.
Free plan · paid from $4/user/mo (annual) · 14-day trial Visit site - 2
Perplexity
Free plan AndroidAPIiPhone+3Research, files, images, and AI app integrations — Perplexity combines web search, file uploads, image generation, apps, and team workspaces instead of shared-inbox task automation.
Free plan Visit site - 3
Spike
Free plan AndroidiPhoneMac+2Unified email, calls, notes, tasks, and calendar — Spike combines email, calls, notes, tasks, to-dos, calendar tools, and chat-like threads in one hub.
Free plan · paid from $4/user/mo (annual) Visit site - 4
Superhuman Go
Free plan AndroidExtensioniPhone+3Cross-app assistance and custom no-code agents — Superhuman Go understands screen context and supports scheduled custom agents across email, Slack, calendars, and business apps.
Free plan · paid from $12/mo (annual) Visit site - 5
Mailtwine
Paid AndroidiPhoneLinux+3Automated inbox triage and replies across platforms — Mailtwine offers automatic sending, thread summaries, follow-up actions, and unlimited beta access without Serif’s shared-address positioning.
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OpenMailBot
Free plan LinuxMacSelf-hosted+2Self-hosted, privacy-focused email AI — OpenMailBot is an open-source, self-hostable layer that analyzes email, Slack, attachments, and documents while keeping emails on your server.
Free plan Visit site - 7
Spark +AI
Free plan AndroidiPhoneMac+1AI email work across many providers — Spark searches mail, attachments, calendars, and meeting notes, and can schedule, send, translate, and organize across many providers.
Free plan · paid from $10/user/mo · 7-day trial Visit site - 8
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Coherence
Free plan AndroidAPIMac+2 - 10
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MailStack
Free plan Self-hostedWeb - 12
Hiver
Free plan API - 13
Maxdesk
Free plan Web - 14
Sharebox
Free plan ExtensionWeb - 15
UnInbox
Free plan APISelf-hostedWeb - 16
Zoho TeamInbox
Free plan AndroidiPhoneWeb - 17
Zavu Inbox
Free plan APIWeb - 18
Drag
Free trial AndroidAPIExtension+4 - 19
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Gmelius
Free trial AndroidAPIExtension+2 - 21
Helpwise
Free trial AndroidiPhoneWeb - 22
Keeping
Free trial AndroidExtensioniPhone+1 - 23
Loop Email
Free trial AndroidiPhoneMac+2 - 24
Emailgistics
Free trial WebWindows - 25
Shared Inbox by Canary
Free trial iPhoneMacWeb+1 - 26
Sortd
Free trial AndroidAPIExtension+2 - 27
Jelly
Free trial Web - 28
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ShareMail
Free trial AndroidWeb - 30
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Sektra AI
Free trial Web
An alternative may fit better when you want a personal email assistant, broader research and file tools, a unified communications hub, local processing, or more mail-provider choices. Serif works on iOS, macOS, web, and Windows, while Android is coming soon. Plans range from free credits to $30 monthly and higher tiers, with a seven-day trial. When switching, weigh shared-inbox automation against individual productivity, supported platforms and providers, privacy architecture, collaboration features, and whether the product can handle the kinds of follow-up your team needs.