Email an AI.
Get a draft in your inbox.
We draft. You send (or don't). SlyReply emails the reply back to you — never on to anyone else — so you can read it, tweak it, and forward it, save it, or just keep it for yourself.
227 pre-built agents — lawyers, translators, researchers, coaches, coders — or build your own. No app to install. No browser tab to keep open. Just your normal email.
It works over plain email — nothing new to sign into, no access to your inbox. Learn why this matters →
Why email, not a chat app?
Nothing new to learn. You already know how to send an email.
It keeps a record. Every question and answer stays in your inbox — a search-and-forward audit trail by default.
Works everywhere. Any phone, any computer, any email app — even on locked-down work WiFi.
Email the address below and watch a real AI reply land in your inbox in seconds.
demo@slyreply.aiOnly you can email your agents.
Your customers never email SlyReply directly — we recognise you by the address you send from, so an unknown sender just hits a dead end. The replies only ever come back to your inbox. We never connect to your mailbox, so we don't read your mail or touch anything you didn't send us.
Yes — the AI reads the one email you send it, the same way it has to read a question to answer it. But that's where it ends: we don't save the contents of your emails or its replies. Once the reply is on its way to you, nothing is kept. Your conversations live in your own inbox, not on our servers.
Who's it for?
Three ways people use SlyReply.
Drafting replies for your shop.
Forward a customer's message to your agent and it emails you back a ready-to-send reply. Read it, tweak it if you want, then forward it to the customer. SlyReply never auto-answers anyone — your customer only ever hears from you, when you decide to press send.
Meet Sunny the Support Star →
Translate, summarise, research.
Forward a foreign-language email and get it back in English with cultural context. Ask a question and get an expert answer. Hand off a research task — all from your normal inbox.
Meet Yuki the Translator →
Talk to a specialist.
Pick from 227 ready-made agents — a lawyer for that contract, a chef for tonight's dinner, a code reviewer for your PR. Or build your own from scratch in two minutes.
Browse the catalog →
Four things you can do today
Stuff you already do with email.
Just superpowered.
Ask anything
Send a question, get a thoughtful answer back.
Hi! Tell me what you can do — and show me something clever while you're at it.
Hey — nice to meet you. You just sent an email and got an AI reply. No app, no extension, no extra login. That's the whole trick.
SlyReply lets you create your own agents — a lawyer, a translator, a chef, whatever — each with their own email address. You email them, they reply, the thread just works.
Want your own? → slyreply.ai
Claude Sonnet 4·Claude Haiku 4.5·GPT-4o-mini
Forward to translate
Forward any non-English email — Yuki returns it in English with cultural context.
--- Forwarded message ---
お世話になっております。
先月分の請求書につきまして、項目ごとの内訳をいただけませんでしょうか。来週中にご返信いただけますと幸いです。
何卒よろしくお願いいたします。
Here's what they're asking:
"They'd like an itemised breakdown of last month's invoice, with a reply by end of next week."
A note on tone: this is polite business Japanese (keigo). It's the standard formality for B2B in Japan — respectful but not urgent. The closing 「何卒よろしくお願いいたします」 is a standard sign-off, not a sign of impatience.
Works on our fast models · Best on our most capable models
Vet a contract
Forward a PDF — Lizzy reads it and flags what you should push back on. Attachment processing is a Pro feature.
Hey Lizzy — can you take a look at this before I sign? Anything I should push back on?
Reviewed it. Mostly standard, but clause 7.3 is one-sided:
The auto-renewal locks you in for 24 months with only a 90-day cancellation window. Industry norm is 30. I'd push back to "30 days notice, any time after month 12" and add an early-exit clause for material breach.
Also worth flagging: clause 12 (IP assignment) gives Acme rights to derivative works you create using their tools. If you build anything substantive on their stack, that could include things you'd want to keep.
(I'm thorough but not your lawyer — get a real one to bless any redlines before you sign.)
Works on our fast models · Best on our most capable models
Subject line → image
Just put your prompt in the subject — Cody handles the rest.
(no body — just the subject is enough)
Generated! Cyberpunk Tokyo at midnight — your good boy keeping watch under the neon. Image attached, ready to send.
Best on Stability AI·DALL-E
Or never forward by hand — set a rule.
Add an auto-forward rule in Gmail / Outlook / your client of choice — every matching email is routed to your agent and the AI's reply lands back in your inbox, ready for you to read, edit, and forward on. Triage every customer enquiry, translate every supplier email, write cover-art prompts for every newsletter — without ever giving up the final send. SlyReply only emails you — never your customers. Forwarding the reply on is your call.
Forget the exact address? It still works.
Every account comes with a catch-all agent at anything@slyreply.ai. Email any name you haven't set up — a typo, a guess, a spur-of-the-moment idea — and it still gets a reply instead of bouncing. One address you never have to remember.
Pro ($9) unlocks image generation and document attachments. Power ($29) adds the most capable reasoning models — including GPT-5.
Three steps. That's it.
No APIs to learn. No dashboards to check. Just email.
Pick an Agent
Browse 227 AI agents — lawyers, translators, coders, coaches, chefs, and more. No setup needed, just email.
Send an Email
Email your agent at its address. Works from any device, any email app, anywhere in the world.
Get a Reply
Your AI agent responds directly to your inbox. Full conversation threading, just like emailing a real person.
What is SlyReply?
SlyReply is an AI email assistant you use entirely over email: you send a message to one of 227 specialist AI agents at its own address (like accountant-alex@slyreply.ai) and it emails an expert reply straight back to you. There is no app to install, no browser extension, and no inbox access — SlyReply only ever sees the message you choose to send it, never the rest of your mailbox, and it stores no message contents. Each agent has a focused persona — an accountant, a translator, a customer-service rep, a coder — so you get a tailored answer instead of a blank chatbot. Because it runs on plain email, it works on any device and any email client, and every question you ask and answer you get stays timestamped and searchable in your own Sent and Inbox folders.
Frequently asked questions
- What is SlyReply?
- SlyReply is an AI email assistant you use entirely over email. You send a message to one of 227 specialist AI agents at its own address (like accountant-alex@slyreply.ai) and it emails an expert reply straight back to you — no app to install and no inbox access.
- Does SlyReply need access to my inbox?
- No. SlyReply never connects to your mailbox and can’t read your inbox. It only ever sees the individual message you choose to send to an agent’s address — never the rest of your mailbox — and it stores no message contents.
- Which email apps and devices does it work with?
- Any of them. Because SlyReply works over plain email, it runs in Gmail, Outlook, Proton, iCloud, Yahoo, Fastmail and any other client, on any device — there is nothing to install.
- How do I get a reply from an agent?
- Pick an agent from the catalog of 227, email it at its address, and it emails an expert reply straight back to your inbox. Hit Reply to keep the conversation going — the quoted thread carries the context forward.
- How much does SlyReply cost?
- SlyReply uses simple flat-rate monthly plans, including a free tier — not per-message credits. See the pricing page for the current Free, Pro and Power plans.
- Is my data private?
- SlyReply never stores the contents of your emails or the AI’s replies. It keeps only the minimal metadata needed to route and thread messages; the conversation itself lives in your own Sent and Inbox folders.
Why email?
AI shouldn't require a new app. Email is the one tool everyone already has.
Any client. Any country.
Gmail, Outlook, Proton, iCloud, Yahoo, Fastmail — if you've got email, you've got AI. No "supported devices" list.
Works wherever email does.
No app to install, no browser tab to keep open — if your device can send email, it can reach your agent. Always use SlyReply in line with your organisation's policies.
An audit trail, for free.
Every question you asked and every answer you got is timestamped and searchable in your own Sent and Inbox folders — proof of what was said, without setting anything up.
Threads keep their context.
Hit Reply and the quoted message chain carries the conversation along — your AI picks up where you left off. We don't store your messages: that context travels in the thread itself, so on a few mobile apps that trim quoted text you may need to leave it in place.
One honest caveat: your AI follows a thread through the quoted text your email app keeps when you reply. A few mobile apps trim that quote — if they do, the AI sees only your latest message. How threading works →
Pricing
One simple price. Every AI.
Flat monthly plans — no tokens, no credits, no per-message charge. Start free, upgrade when you want the latest models and image generation.
Try before you deploy
Chat-test any agent in your browser — same AI, same behaviour as the email version — so you know exactly how it replies before you put it to work.
Open PlaygroundReady to get sly?
Create your account and start emailing 227 AI agents. No setup required.
Or just email demo@slyreply.ai — no signup needed.