About Replyku
Updated
Who makes this, why it exists, what it runs on, and how to get in touch.
Replyku is an independent site, built and maintained by one person. It does one thing: you paste a message someone sent you and it drafts the reply. There is no company behind it, no funding round, and no plan to turn it into a suite of products.
Why it exists
General-purpose chat assistants can write a reply, but you have to explain the situation to them first, and the result comes back in the same recognisable register no matter who you were writing to. Most of the effort in a difficult reply is not composition — it is deciding how blunt to be, whether to apologise, and how much to explain.
So this asks for the two things that actually determine the answer — the message you received, in full, and one line about what you want to get across — and it reads the register out of the original rather than asking you to describe it. The writing-samples field exists for the same reason: a reply that doesn't sound like you is worse than no reply.
How it works underneath
A language model writes the drafts. Requests are served by a self-hosted model where capacity allows, and fall back to a hosted provider when it doesn't — the label under each draft tells you which one wrote it, because when you have pasted private mail into a box you are entitled to know where it went.
Nothing you type is stored. There is no database of drafts, no history, no account. Writing samples and your theme preference are kept in your browser's local storage and never leave your device except as part of a draft request. The privacy page sets all of this out in more detail, including who the third parties are.
How it is paid for
Running the models costs money, so the site carries advertising from Google AdSense. That is the whole business model — there is no paid tier, no data sold, and no newsletter. If you use an ad blocker, the tool works exactly the same.
The guides
The guides on this site are written by hand, not generated by the same model that writes the drafts. They exist because some replies deserve thought rather than automation, and because the advice in them — say no in the first two lines, acknowledge before explaining, add something new rather than repeating yourself — is what the tool is trying to apply on your behalf.
Contact
Corrections, bug reports, complaints about a draft it got badly wrong, or anything about privacy and advertising: adjiesantooso@gmail.com. Mail from readers is answered by a person.