The 7 Best Shortwave Alternatives in 2026 (Real Pricing, Honest Trade-offs)

Shortwave alternatives at a glance

Two columns do most of the sorting work here. "Client switch?" tells you whether the tool repeats Shortwave's biggest ask, moving your daily email into a new app. "Sends or drafts?" tells you whether it just helps you write, or actually takes email off your plate.

A note on method, and a disclosure: each price above comes from the vendor's own site, retrieved on 23 September 2026, with retrieval dates and caveats flagged inline. InReply is our product, and it appears first because it occupies the one segment nothing else on this list serves, not because this is a neutral ranking. Every pro and con here, ours included, is written to be checkable.

Why people look for a Shortwave alternative

Credit first. Shortwave is arguably the most ambitious AI email client on the market: AI search across your whole history, agentic commands that organise and schedule, plain-English filters, todos, and drafting that learns your voice, all running on Claude models in polished apps for web, Mac, Windows, iOS and Android (shortwave.com, retrieved 23 September 2026). For a Gmail power user, it is a genuinely impressive product.

Pricing, verified from shortwave.com/pricing on 23 September 2026: the page has two tabs. Individual holds a Free plan and Pro at $18/user/month ($14 billed annually, though no annual toggle is displayed). Business, the tab shown by default, holds Business at $30/seat/month, Premier at $45/seat/month and Max at $120/seat/month. Paid tiers carry a 14-day free trial. Be careful with sources that quote only the $30-120 range or say there is no free plan: they are describing the Business tab and missing the Individual plans.

People switch for four reasons, each mapping to a tool below:

1. Gmail only. Outlook and Microsoft 365 are not supported. If your business mail is Microsoft, the conversation ends there.
2. It is a full client switch. You, and anyone you work with, move out of Gmail's interface into Shortwave's apps.
3. Team cost climbs fast. The Free and $18 Pro plans are for individuals; teams sit on the Business tab at $30-120 per person per month, with the model quality and AI usage gated by tier.
4. It accelerates you; it does not answer for you. Every customer email still ends with a human reading, deciding and sending.

One-line router: if your complaint is the client, the client alternatives are #2 and #3; if your complaint is that email still needs you, start at #1 and read down.

1. InReply, best for small businesses that want customer email answered, not accelerated

Honest framing up front: InReply, which is us, is not an email client at all and will not give you AI search over your archive. It is an AI email agent for the support@, hello@ or info@ inbox where customers are waiting on answers. If what you loved about Shortwave was the cockpit, skip to Superhuman or Missive below.

The mechanics: InReply connects to your existing Gmail, Google Workspace, Outlook or Microsoft 365 inbox via OAuth. No new email client, no extension, no migration; your team keeps working exactly where they already do, and replies go out from the address customers already write to. Answers are grounded in the workspace's own knowledge base, and when InReply does not know something, it leaves the email for a human instead of inventing an answer.

Playbooks control tone, behaviour and routing per scenario, and they also control sending. Ghost Mode, available on all plans, saves every reply as a Gmail or Outlook draft for review; Autopilot sends automatically for the playbooks you trust. Emails that need a person land in an actions list with urgent flagging, and team members get per-inbox access without shared credentials. The net effect works like an email answering service that lives inside your own inbox.

• Honest cons: not a client, so no inbox UI, AI search or todos; built for inbound business email, not personal productivity.
• Pricing: flat per workspace, not per seat. Starter £39/mo (500 credits, 1 inbox), Growth £79/mo (2,000 credits, 3 inboxes), Scale £149/mo (5,000 credits, 5 inboxes), Business custom (10,000+ credits, unlimited inboxes). 14-day free trial, no credit card. Details on the pricing page.
• Go deeper: the InReply vs Shortwave head-to-head.

2. Superhuman, best premium client if speed is the whole point

If Shortwave's appeal was a beautiful, fast client and the AI was secondary, Superhuman is the obvious cross-shop. It is the speed benchmark: keyboard-first UX, split inbox, Instant Reply, Auto Labels, and AI drafting via Auto Drafts and Ask AI on its Business tier. Unlike Shortwave, it supports both Gmail and Outlook.

Pricing as of 23 September 2026: Superhuman Mail on its own is Starter at $25/member/month billed annually ($30 monthly) or Business at $33/member/month annually ($40 monthly), which adds Auto Drafts and Ask AI, with Enterprise on request (superhuman.com/plans/mail). Superhuman is also the renamed Grammarly, and the wider suite at superhuman.com/plans has a Free tier and a Pro tier that both exclude Mail; the suite plan that includes Mail is Business at the same $33/$40.

Honest trade-off: it is still a client switch, still per-seat, and every send stays in human hands; you are paying for you being faster, not for email being handled. Best for: founders and execs processing high personal volume. Our Superhuman alternatives guide covers this end of the market in depth.

3. Missive, best for teams that share inboxes

Shortwave has team features, but Missive is a team email system from the ground up: shared inboxes, internal comments in the margin of a thread, assignments, and email alongside SMS and social channels. Its AI assistant is included on all plans, with bring-your-own-key support for Anthropic, OpenAI and Gemini models (missiveapp.com/pricing, retrieved 23 September 2026).

Pricing, verified 23 September 2026: Starter $14/user/month (up to 5 users), Productive $24/user/month and Business $36/user/month, all billed yearly; monthly billing is $18, $30 and $45. There is no free plan (Missive's own docs say so), but there is a 30-day Productive trial with no card. Even its top tier billed yearly undercuts Shortwave's $45 Premier.

Honest trade-off: it is a client switch into Missive's own app, and a human still sends every reply; the AI drafts and summarises rather than resolves. Best for: teams of 3+ whose real problem is collaboration, the who-is-handling-this question, more than volume. More on that category in our shared inbox software guide.

4. Fyxer AI, best AI drafting inside the inbox you already have

Fyxer delivers a large slice of what people buy Shortwave for, triage and AI drafts in your voice, without the client switch: it works inside your existing Gmail or Outlook account, sorting incoming mail and leaving ready-to-edit drafts, plus meeting notes and scheduling. Its homepage pitch is "You just review and hit send." (fyxer.com, retrieved 23 September 2026).

Pricing, verified from fyxer.com/pricing on 23 September 2026: Starter $30/user/month ($22.50 billed annually), Professional $50/user/month ($37.50 annually) which adds multiple inboxes, HubSpot integration and file-upload training, and a custom Enterprise tier at 50+ seats. 7-day free trial, no free plan.

Honest trade-off: per-seat pricing lands right on top of Shortwave's entry tier, drafts never send themselves, and document-grounded answers are gated to the $50 tier. Best for: individuals who want Shortwave-ish AI help but refuse to leave their inbox. See InReply vs Fyxer for how it compares on customer email specifically.

5. Jace AI, best budget AI drafting assistant

Jace is a personal AI email assistant that connects to your existing inbox, triages, and prepares draft replies for your approval, positioning itself as an autonomous-feeling assistant at a lower price than the premium clients. Its site is vague about providers ("Securely link your email inbox"), but its docs, checked 23 September 2026, describe syncing mail from both Gmail and Outlook.

Pricing, verified from jace.ai/pricing on 23 September 2026: Plus at $25/month ($20/month billed yearly) with 10,000 monthly credits and up to 2 inboxes, Pro at $50/month ($40/month yearly) with 20,000 credits and up to 8 inboxes, plus a usage-based Enterprise tier. 7-day free trial and a 30-day money-back guarantee; ignore older reviews citing a discontinued $65 price.

Honest trade-off: drafts only, credit-metered, and a personal tool rather than a business answering system. Best for: solo users who want AI triage and drafts under Shortwave's entry price. Head-to-head detail in InReply vs Jace.

6. Serif, best AI employee for business email that can send

Serif frames itself as email off your plate rather than a better email tool: it reads incoming mail, triages, drafts replies and tracks follow-ups, working with both Gmail and Outlook including shared addresses like info@ and support@ (serif.ai, retrieved 23 September 2026). Everything starts as a draft you approve, and you can then enable auto-send for specific low-risk scenarios such as routine order-status questions.

Pricing, verified from serif.ai/pricing on 23 September 2026: Lite $30/month, Standard $50/month, Pro $200/month, Team $50/user/month and Enterprise on request, with an annual toggle at $27, $45, $180 and $45 respectively. 7-day free trial, no card required to start.

Honest trade-off: it is the closest philosophy to InReply on this list, so weigh the two directly; the differences come down to how replies are grounded and controlled, and how pricing scales. Best for: small businesses that want an AI-employee framing for the inbox. Our InReply vs Serif comparison goes through it properly.

7. Ellie, best for overnight reply drafts in your voice

Ellie is the most focused tool here: it learns your voice from your sent mail, then drafts replies to incoming threads straight into your Drafts folder overnight, so you skim, tweak and send in the morning. It works with Gmail, Google Workspace, Outlook.com and Microsoft 365 via a connected account, a browser extension (Chrome, Edge, Firefox) or an Outlook add-in (tryellie.com, retrieved 23 September 2026).

Pricing, verified from tryellie.com/pricing on 23 September 2026: Casual $19/month (browser extension only, 25 replies a day), Business $39/month (direct inbox integration with auto-drafting, advanced knowledge base, 3 seats included) and Professional $79/month (unlimited replies, 5 seats included). Extra seats from $5/user. 7-day free trial, no card required, and no free plan.

Honest trade-off: drafts only, and the team and knowledge-base features (bundled seats, roles, and knowledge training from PDF, Word and URL sources) only arrive on the $39 Business tier; even then it drafts for you to send rather than answering customers itself. Best for: individuals whose only wish is waking up to replies already written in their voice. See InReply vs Ellie for the business angle.

How to choose: match the tool to the job

• Customers waiting on support or sales replies: InReply
• Premium personal client, Gmail or Outlook: Superhuman
• Team collaboration on shared email: Missive
• AI drafts without leaving your inbox: Fyxer
• Cheapest capable drafting assistant: Jace
• AI employee that can graduate to sending: Serif
• Overnight drafts in your voice, nothing more: Ellie

The question that sorts the whole list: do you want to do email faster, or do you want less email to do? Shortwave, Superhuman and Missive are faster-cockpit tools. Fyxer, Jace and Ellie speed up the writing but keep every send human. Only InReply and, within limits, Serif actually take replies off your plate, and only with grounding and controls that make that sensible.

For auto-send sceptics, InReply's safety design is the point rather than a footnote: replies come only from the knowledge base you build, unanswerable emails are left for a human rather than guessed at, Autopilot is switched on per playbook, and Ghost Mode keeps everything as drafts on every plan until you are ready. Comparing head-to-head first? Read InReply vs Shortwave, or the broader field in our guide to AI email assistants for Gmail and our small-business AI email assistant roundup.