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Best Shortwave alternatives for founders in 2026

By Prio editorialUpdated 3 min read

Why people look for alternatives to Shortwave

Shortwave is a beautiful AI-native Gmail client — ghostwriter, AI summaries, instant search, threaded conversations. Excellent for inbox-only AI. But it's still email-only, Gmail-only, and pricing escalates aggressively at higher AI tiers. If you need calendar, tasks, CRM, or Outlook coverage, here are the alternatives.

  • •Email-only — no calendar, tasks, or CRM coverage
  • •Gmail-only — no Outlook support
  • •AI usage caps and tier upgrades stack up fast
  • •Want one AI agent across your whole stack, not just inbox
  • •Need a real chief of staff with proactive nudges and approval gates

The best Shortwave alternatives

#1

PrioOur pick

Best for: Founders who want one AI chief of staff covering email, calendar, tasks, CRM, GitHub, Slack, voice, and briefings — in Gmail OR Outlook.

Pricing: Starter €29/mo, Pro €79/mo, Business €199/mo. 30-day money-back guarantee.

Pros

  • Full chief-of-staff scope vs Shortwave's email-only focus
  • Works with Gmail AND Outlook (Microsoft Graph discovery)
  • Anticipation engine: birthdays, board prep, contract renewals, key meetings before you ask
  • Year-over-year recall of past actions ('last year you booked Le Sirenuse')
  • P0 ringer rings your iPhone via VoIP/CallKit on truly urgent items
  • Three voice modes: browser agent, inbound phone, outbound calls
  • Approval queue + audit trail on every outbound action
  • Autonomous email scheduling negotiations until both parties agree
  • Multi-channel: Slack, Telegram, Discord, Teams, iMessage, WhatsApp
  • EU data residency, GDPR compliant

Cons

  • −Email UX less polished than a dedicated AI client
  • −No in-thread ghostwriter that drafts in your voice the way Shortwave does
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#2

Superhuman

Best for: Power emailers who want the absolute fastest, most polished email client.

Pricing: $25-30/mo

Visit

Pros

  • Fastest, most polished email client
  • Excellent keyboard shortcuts
  • Solid AI write/triage features

Cons

  • −Email-only
  • −Premium price for a single-function tool
  • −No CRM or task management
#3

Spark

Best for: Teams that want shared inboxes and email collaboration.

Pricing: Free; Premium $7.99/mo

Visit

Pros

  • Strong shared inbox features
  • Cross-platform native apps
  • Cheap

Cons

  • −AI features lighter than Shortwave
  • −Not really an agent
#4

Spike

Best for: People who want chat-style email threads.

Pricing: Free; Pro $5/mo

Visit

Pros

  • Conversational email view
  • Cheap entry tier
  • Cross-platform

Cons

  • −Conversational view isn't for everyone
  • −Smaller AI footprint

Side-by-side comparison

FeaturePrioSuperhumanSparkSpike
AI scopeFull chief of staffEmail AILight AI—
Outlook supportYes — fullYesYes—
Calendar + tasksYesBasicBasic—
Voice agentYes — 3 modesNoNo—
Pricing (entry)€29/mo$25/moFree—

Frequently asked questions

Is Prio's email AI as good as Shortwave's?

For email-only AI features (in-thread ghostwriter, AI summaries on every thread, AI search across inbox), Shortwave has the edge — it's purpose-built. Prio's email AI is solid (triage, auto-archive, drafting, follow-up tracking, autonomous scheduling negotiations) but operates conversationally rather than inline.

Does Prio work with Outlook?

Yes. Prio supports Gmail AND Outlook via Microsoft Graph, plus Calendar, Drive, OneDrive, and Microsoft API discovery. Shortwave is Gmail-only.

Can I use Prio and Shortwave together?

Yes. Use Shortwave as your AI Gmail client for fast triage and reading, Prio for cross-domain AI orchestration (calendar, tasks, CRM, briefings, voice). Both connect to Gmail independently.

Why is Prio more expensive than Shortwave Pro?

Prio (€29-79/mo) is broader than Shortwave Pro ($9/mo) — it's not just an email client. It replaces email AI + calendar AI + task tool + CRM + voice agent + briefing tool. Compare against the bundle, not the email tier.

Related rankings

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Further reading

Best AI tools for founders in 2026AI chief of staff vs hiring an assistantThe anticipation gap — why AI agents feel reactiveMulti-source AI: connecting email, calendar, and tasks

Want a deeper head-to-head comparison of Prio and Shortwave?

See Prio vs Shortwave →

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