AI Email Assistants
Alternatives to Serif
Serif is aimed at teams that want routine work handled inside shared addresses rather than merely drafting individual messages. Its AI employee can qualify and route inquiries, answer common questions, collect paperwork, send quotes, and follow up on unpaid invoices. It connects with Google Workspace or Microsoft 365, can use its own address, and escalates ambiguous or sensitive mail for human approval. Serif also states SOC 2 Type 2, GDPR, and HIPAA compliance, encrypted learned data, and no use of emails to train general AI models.
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Fyxer Fyxer is aimed at salespeople, recruiters, real estate agents, and others with heavy inbox workloads.
From $22.50/mo Free plan Web · Windows · macOS · iOS9.4 Visit Specs - 02
Drag Drag suits teams working in Gmail and Google Workspace that need shared handling of customer communications.
From $12/mo Free trial Web · Windows · macOS · iOS9.3 Visit Specs - 03
Mailbutler Smart Assistant It suits people who want help drafting, improving, summarizing, and organizing email in Apple Mail, Outlook, or Gmail.
From $7/mo Free plan Web · Windows · macOS · Linux9.2 Visit Specs - 04
Perplexity The free plan suits people asking simple questions with limited weekly use.
From $20/mo Free plan Web · Windows · macOS · iOS8.9 Visit Specs - 05 Metis Mail From $9.58/mo Free plan Open source Web · API · Self-hosted8.8 Visit Specs
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Spark +AI Individuals and small teams may suit Plus; Pro is described for professionals and client-facing teams.
From $10/mo Free plan Windows · macOS · iOS · Android8.6 Visit Specs - 07 Inbox Zero From $20/mo Free trial Web · iOS · Android · API8.4 Visit Specs
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Demi From $25/mo Free plan macOS8.3 Visit Specs - 09
Kai From $20/mo Free trial Web · macOS · iOS · Android8.3 Visit Specs - 10 Kerna
Kerna suits professionals who want help sorting, drafting, summarizing, or translating email within Gmail or Outlook.
From €12/mo Free plan Web · Windows · macOS8.3 Visit Specs - 11
Spike Spike says its Email App suits people upgrading an existing email experience or managing multiple accounts.
From $4/mo Free plan Web · Windows · macOS · iOS8.3 Visit Specs - 12
MailCopilot Free plan Windows · macOS · Linux8.2 Visit Specs - 13 MailFlow From $12/mo Free plan Web · API · Self-hosted8.2 Visit Specs
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MailMaestro MailMaestro suits professionals who want help composing, revising, and organizing email, especially those working in Gmail or Outlook.
From $12/mo Free plan Web · Browser extension8.2 Visit Specs - 15
Shortwave Shortwave suits people and teams who want AI tools alongside business email, including shared threads, private comments, and assigned next steps.
From $30/mo Free trial Web · Windows · macOS · iOS8.2 Visit Specs - 16 Ellie Free trial Web · Windows · Browser extension8.1 Visit Specs
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EmailAgent Free plan Web8.1 Visit Specs - 18 EmailOps Free plan Windows · macOS · Linux8.1 Visit Specs
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InboxPilot From $32/mo Free trial Web · Self-hosted8.1 Visit Specs - 20
MorningZero From $15/mo Free trial Web · Windows · macOS · Linux8.1 Visit Specs - 21
Superhuman Go It suits people who want in-context writing help and app-connected assistance while working across email, calendars, and other services.
From $12/mo Free plan Web · Windows · macOS · iOS8.1 Visit Specs - 22
InReply From £39/mo Free trial Web8.0 Visit Specs - 23 MailWise From £15/mo Free plan Web7.9 Visit Specs
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Quell From A$14.95/mo Free trial Web · Android · Browser extension7.9 Visit Specs - 25
OpenMailBot Free plan Web · Windows · macOS · Linux7.8 Visit Specs - 26
Pontius Free trial Windows · macOS · Linux7.8 Visit Specs - 27
Maillifier Free plan Web · Self-hosted7.7 Visit Specs - 28
Remail From $0.54/mo Free trial Web · Browser extension7.6 Visit Specs - 29 DispatchMail Web · API · Self-hosted7.5 Visit Specs
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Missive From $14/mo Web · Windows · macOS · iOS7.4 Visit Specs
Choosing instead of Serif
An alternative may suit you better if you need personal-inbox assistance, broader research tools, more mail providers, local processing, or a unified hub for email and other work. Serif supports iOS, macOS, web, and Windows; Android is coming soon. Pricing starts at $30/mo, with a free plan offering $100 in credits and a 7-day trial. Compare shared-inbox automation with individual productivity, supported platforms, provider coverage, privacy controls, collaboration, and how much control remains over sending replies.