Comparison
The AI email assistant that never touches your inbox
Most AI email assistants work by connecting to your inbox — they read, classify, and draft inside Gmail or Outlook, which means granting an app ongoing access to your mail. SlyReply works the opposite way: you send a message to an AI agent's address (like accountant-alex@slyreply.ai) and it emails an expert reply back. There's nothing to install, no browser extension, and no inbox connection — SlyReply only ever sees the message you choose to send it, never the rest of your mailbox, and it stores no message contents. For people and teams who can't or won't hand inbox access to a third-party tool — regulated industries, privacy-conscious users, anyone tired of OAuth prompts — that difference is the whole point. You get AI drafting and 227 specialist agents over plain email, from any device.
What does "inbox access" actually mean?
Inbox-integrated tools ask you to sign in with Google or Microsoft and grant ongoing permission to read, send, and manage your email. That access stays live in the background so the tool can triage and draft in place. It's convenient — and for managing an existing inbox it can be the right call — but it means a third party holds standing access to everything in your mailbox. SlyReply asks for none of that: there's no sign-in with your email provider and no OAuth grant, because it never touches your inbox in the first place.
SlyReply vs. inbox-integrated AI email tools
Competitor details as of May 2026 — see sources below.
| SlyReply | Fyxer | Shortwave | Superhuman | |
|---|---|---|---|---|
| Needs access to your inbox | No | Yes | Yes | Yes |
| Works in any email client (no app or extension) | Yes | No | No | No |
| Pre-built specialist agents | 227 | — | — | — |
| Free plan (not just a trial) | Yes | Trial only | Trial only | No |
| Starting price | Free, then $9/mo | $30/mo + overage | $24/seat/mo | ~$33–40/mo |
When an inbox-integrated tool is the better fit
If what you want is in-place triage of your existing inbox — auto-sorting, snoozing, and one-click drafts right inside the mail you already receive — a connected client like Shortwave or Superhuman is built for exactly that, and does it well. SlyReply is for the other job: getting an expert AI reply on demand over plain email, without handing over inbox access. Many people use both.
FAQ
Does SlyReply read my inbox?
No. SlyReply never connects to or reads your inbox. You email an AI agent at its own address (like accountant-alex@slyreply.ai) and it emails a reply back — it only ever sees the message you choose to send it, and it stores no message contents.
Do I need to install an app or browser extension?
No. SlyReply works in any email client — Gmail, Outlook, Proton, iCloud, Fastmail — with nothing to install and no browser extension. If your device can send email, it can reach your agent.
How is this different from Fyxer, Shortwave, or Superhuman?
Those are inbox-integrated assistants or email clients that connect to your mailbox to triage and draft. SlyReply is email-native: you send it a message and get an expert reply, without granting inbox access. (Competitor details as of May 2026.)
Is there a free version?
Yes. SlyReply has a free plan; Pro is $9/mo and Power is $29/mo — flat-rate, with a fair-use policy and no per-email overage charges.
What can the AI agents do?
SlyReply includes 227 specialist agents — accountants, translators, customer-service reps, coders and more — each with a focused persona, so you get a tailored answer instead of a blank chatbot.
See it without signing up for anything
Email demo@slyreply.ai and watch an AI reply land in your inbox. No account, no inbox access.
Email the demo agentSources (competitor details, May 2026):Fyxer pricing · Shortwave pricing · Superhuman plans.
SlyReply is the product described on this page; comparisons are made in good faith from publicly available information and may change as competitors update their products. Last updated May 2026.