Slashy Alternatives: 7 AI Email Assistants Compared
Slashy launched on Product Hunt in June 2026, finished the day at number one, and earned the attention. It drafts replies in your voice, triages what matters, tracks who still owes you an answer, and prepares you for your next meeting. You can fire off an email from Slack or iMessage. It carries SOC 2 Type II and CASA Tier 2, does not train on your data, and enforces zero data retention with its AI providers.
If you are evaluating it and something is not sitting right, it is usually one of three specific things rather than a general complaint about quality.
What actually sends people looking
It only works with Gmail. Slashy’s own FAQ is direct about this: it works with Gmail and Google Workspace today, and Outlook is coming soon. If you are on Outlook, or half your team is, this is not a preference problem. The product does not reach you yet.
There is no free tier. Two plans, Professional and Enterprise. Professional runs $25 per user per month billed annually, or $30 billed monthly. The trial is seven days and requires a credit card up front. That is a normal way to sell software, but it means you cannot quietly test it on your own inbox for a month before involving anyone.
The scope is email and calendar. Roughly fifteen tool connections, covering the obvious ones like Slack, Notion, and HubSpot, plus an MCP integration for agent-compatible tools. That is a deliberate, focused product. It is also a ceiling if the work you want automated starts in the inbox and then needs to touch six other systems.
None of those are defects. They are positioning. The question is whether the positioning matches you.
1. Carly
Carly does the same core job, an assistant that reads your email, handles your calendar, and acts on what arrives, without the Gmail requirement. It runs on Gmail and Outlook, and on both at once if you keep a personal and a work account.
The bigger structural difference is reach. Where Slashy connects to about fifteen tools, Carly ships roughly 260 native integrations, and anything else with a public API connects with your own key pasted on the integrations page. That matters because inbox work rarely stops at the inbox. A client emails asking to move Thursday, and the useful version of that is checking the calendar, proposing times, updating the CRM, and logging the change, not just drafting a good reply.
It also triggers on events rather than waiting to be asked. A new email lands, an invite arrives, a schedule fires, and the workflow runs on its own.
Pricing: free, unlimited Zapier-style workflows, with AI agents from $35/month. The workflow side is not metered, so the triage-and-route plumbing costs nothing to run.
Best for: anyone who liked Slashy’s premise and is either on Outlook or needs the assistant to reach past email and calendar.
Driving it from your own code, provisioning agents per tenant, embedding it in your product, or running high volume is available. Book a call with the team and we will scope it to your setup.
2. Fyxer
The closest like-for-like on the drafting side, and the most common head-to-head. It writes replies in your voice, organizes the inbox, and takes meeting notes, with a similar “it learns how you write” pitch.
vs. Slashy: overlapping enough that the decision usually comes down to which one’s drafts sound more like you after a week. Worth trialing both on the same inbox rather than reading feature tables. Fyxer alternatives covers that field in more depth.
Best for: heavy email volume where draft quality is the whole decision.
3. Superhuman
A different theory of the problem. Superhuman’s answer is speed: keyboard-first, aggressively fast, with AI added on top of an email client rather than an assistant bolted onto Gmail. If your issue is that processing mail is slow rather than that you want someone else to do it, this is the honest fit.
vs. Slashy: Superhuman makes you faster at your inbox. Slashy tries to remove you from it. Those are opposite goals and people usually know which one they want.
Watch for: it is a client, so you are changing where you read mail, not adding a layer. Superhuman alternatives if that trade is the sticking point.
Best for: people who genuinely like doing email and want to do it in half the time.
4. Shortwave
Gmail-native like Slashy, but built around retrieval. Its strength is finding things across years of mail and answering questions about your own history, with AI drafting alongside.
vs. Slashy: better if your pain is “I know someone told me this, I cannot find it.” Weaker if you wanted the assistant to take the work off your plate entirely.
Best for: long email histories where search is the real problem. Shortwave alternatives has the wider comparison.
5. Microsoft Copilot for Outlook
The obvious answer to Slashy’s one hard limitation. If you are on Microsoft 365, Copilot is already in the tenant, already approved by IT, and already covered by the existing agreement, which removes the procurement conversation entirely.
vs. Slashy: shallower as an assistant, and the drafting is noticeably more generic. But it works where Slashy currently cannot, and it costs nothing extra if your organization already licenses it.
Best for: Outlook shops that want something today rather than waiting on a roadmap.
6. SaneBox
The minimal option, and underrated for it. It does not draft, does not chat, and does not change your email client. It sorts incoming mail so the noise leaves your main inbox and the rest stays where you expect.
vs. Slashy: far less capable and far less disruptive. If eighty percent of your problem is volume rather than composition, this solves eighty percent of your problem for a fraction of the price.
Best for: people whose actual complaint is how much mail arrives, not how long replies take.
7. Missive
Built for shared inboxes rather than individual ones. Multiple people work the same mailbox, draft together, assign threads, and discuss internally without forwarding chains. AI assists, but collaboration is the product.
vs. Slashy: a different unit of work. Slashy optimizes one person’s inbox. Missive optimizes a team’s.
Best for: support, sales, or ops teams working a shared address.
Choosing between them
You are on Outlook. Carly or Copilot. Slashy does not reach you yet, and “coming soon” is not a deployment date.
You want the assistant to act, not just write. Carly, because the integration surface is where email automation either delivers or stops at a nicely worded draft.
Draft quality is the entire decision. Trial Slashy against Fyxer on your own mail for a week. Feature comparisons are useless here and voice matching is not.
You like doing email and just want to be faster. Superhuman.
The problem is volume, not composition. SaneBox, at a fraction of the cost.
A team shares the inbox. Missive.
The trap worth avoiding is buying an assistant when you wanted a filter, or a filter when you wanted an assistant. The best AI email assistants sorts the wider field by that distinction, and the best AI email agents covers the tools that take action rather than only drafting.
FAQ
How much does Slashy cost?
Professional is $25 per user per month billed annually, or $30 billed monthly. Enterprise is bespoke and adds SSO, SCIM, a dedicated account manager, customized onboarding, and custom security controls. There is a seven-day free trial that requires a credit card, and no free tier.
Does Slashy work with Outlook?
Not yet. Slashy’s own documentation says it works with Gmail and Google Workspace today, with Outlook coming soon. No date has been published.
What does Slashy integrate with?
Around fifteen tool connections including Slack, Notion, and HubSpot, plus calendar, CRM, and meeting notes, and an MCP integration for agent-compatible tools. You can also send mail from Slack or iMessage.
Is Slashy secure enough for a company?
It holds SOC 2 Type II and CASA Tier 2, encrypts at rest with AES-256, states that it does not train on customer data, and enforces zero data retention with its AI providers. The Enterprise tier adds SSO and SCIM.
What is the closest alternative to Slashy?
For draft quality on Gmail, Fyxer is the nearest like-for-like. For the same assistant idea without the Gmail restriction and with a much wider integration surface, Carly is the closer match to what most Slashy evaluators are actually trying to buy.
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See what people say
"Before Carly, I relied on a Calendly link, but the whole process felt impersonal and not very professional. Carly changed that by handling all the back-and-forth, so I'm no longer stuck in endless email threads trying to line up schedules.
Now Carly reaches out to candidates, shares my real-time availability, lets them pick a slot, then sends a Zoom link and drops it straight into my calendar. She sends reminders to both of us before each call, which has significantly reduced no-shows and last-minute confusion.
On top of scheduling, Carly acts like a full executive assistant, sending me my schedule the night before so I can prepare for each call. It reminds me of the old x.ai assistant, but Carly is noticeably smarter, faster, and better suited to my healthcare recruitment business."
