Now in closed beta · Gmail + Outlook
The email agent that learns you,
not fake training data.
Aldyn organizes your inbox with a deterministic engine that shows its work: every email filed for a reason you can read, every correction you make remembered permanently. Other tools guess with a model trained on someone else's email. Aldyn is trained by the only expert on your inbox: you.
Closed beta · founding members lock in 30% off for life · Gmail today, Outlook soon
See how it works →Deterministic first
Rules, sender memory, and header signals file most of your mail with zero AI involved: instantly, for free, and the same way every time. The AI only handles genuinely ambiguous email, and once it decides on a sender, that decision is pinned forever.
Every decision explained
Open the decision log and see exactly why each email went where it went: the rule that matched, the sender you pinned, the header that gave it away, or the AI's reasoning with its confidence. No black box. Ever.
Trained by you alone
Drag one email to the right category and that sender is corrected permanently: visible in your rulebook, reversible anytime. Your mail trains your assistant and no one else's. We never train shared models on your data.
Already spent years filing email? That's your head start.
Connect your inbox and Aldyn can adopt the labels you already use and learn from the mail you've already filed, all in about a minute. No other email assistant does this, because no other email assistant is built to learn from you.
your voice, documented
It doesn't just claim to write like you.
It shows you what it learned.
Aldyn studies the email you've actually sent and writes it down: your greetings, your sign-offs, your habits, how you talk to each specific person. The profile lives in your account as a document you can read. It retrains automatically as you send, and every draft is scored against what you really sent: accuracy is a number, not a promise.
Want it different? Your standing instructions override everything it learned. Want it gone? One click clears it. Your voice belongs to you; Aldyn just takes very good notes.
Writes short, warm, direct emails: straight to the ask in the first line, no formal openers entirely. One idea per paragraph, one question per email. Friendly but never fluffy; uses a dash where most people would start a new sentence.
Everything the others do. Plus the parts they can't.
At 10-50% less than the tools that guess.
| Compare | Aldyn | Fyxer AI | SaneBox | Superhuman | Gemini / Copilot |
|---|---|---|---|---|---|
| Starting price / user / mo | $14 · $10 billed yearly | $30 | $7 | $33+ | bundled |
| AI-grade categorization (understands content, not just rules) | ✓ | ✓ | ✗ | ◐ | ◐ |
| Custom categories you define, trained by your own examples | ✓ | ✗ | ◐ | ✗ | ✗ |
| Shows why every email was filed (decision log) | ✓ | ✗ | ✗ | ✗ | ✗ |
| Consistent by design, same email, same result | ✓ | ✗ | ✓ | ✗ | ✗ |
| Learns your existing labels & filing history at onboarding | ✓ | ✗ | ✗ | ✗ | ✗ |
| A voice profile you can read, with steering you control | ✓ | ◐ | ✗ | ✗ | ✗ |
| Trial that never auto-converts to paid | ✓ | ✗ | ✓ | ◐ | ✓ |
| Your data trains only your assistant, never a shared model | ✓ | ◐ | ✓ | ◐ | ◐ |
Based on vendors' public pricing pages, documentation, and independent reviews as of July 2026. ◐ = partial or limited.
the data pledge
Your email is yours. Full stop.
Never sold. Your data is not for sale, rent, or 'sharing with partners.' There is no version of Aldyn where your inbox is the product.
Never used for ads. No ad targeting, no profiling, no analytics resale. Ever.
Never trains shared AI. Your email and voice profile train your assistant only. Our model providers process your data under paid API terms that prohibit training on it.
Never handed to anyone else. No third party touches your email or your voice training except the infrastructure required to run Aldyn: hosting and model APIs under strict data-processing agreements. The only other exception is a valid legal order we are compelled to comply with.
Never keeps what you delete. Aldyn stores organization records, not copies of your email. Permanently delete a message in your inbox and every trace of it on our servers (its decision record, drafts, example sketches) is purged automatically. Forever.
Not marketing copy: architecture. Aldyn doesn't store your email bodies at all, and everything it learns about you is readable and deletable in the app. Read the full privacy policy.
Common questions
What is Aldyn?
Aldyn is an AI email assistant for Gmail and Google Workspace (Microsoft 365 / Outlook in progress) that organizes your inbox with a deterministic-first engine, explains every filing decision in a readable log, remembers every correction permanently, and drafts replies in your own learned voice. Plans start at $10 per user per month billed yearly.
How is Aldyn different from Fyxer, SaneBox, and Superhuman?
Most AI email tools run a model over every message and can't tell you why anything went where it went. Aldyn is deterministic first: your rules, sender memory, and header signals file most mail with zero AI involved, identically every time, and in live use over 90% of mail never touches a model. Every decision is explained, one correction pins a sender forever, and Aldyn costs 10-50% less than the tools that guess, with an organization-only tier for people who don't want AI drafting at all.
Does Aldyn train AI models on my email?
No. Your email trains your assistant only. Aldyn processes mail in memory, never stores email bodies, and keeps what it learns as readable rules and sender pins you can inspect and delete. Customer mail is never used to train generalized or shared models.
Do I need a new email app to use Aldyn?
No. Aldyn organizes your existing Gmail or Google Workspace inbox behind the scenes using the labels and folders you already have. Your current mail apps on every device keep working exactly as before.
Billing you never have to think about
Your inbox already knows how you work.
Give it an agent that listens.
Join the closed beta and lock in 30% off for life. We're onboarding new inboxes in small waves.