AI letter writing

Your words.
Formally written.
Actually sent.

Describe your situation in plain language. InstaBrief drafts a formal letter, you review it, and we print, stamp, and post it for you, anywhere in Germany.

Download on the
App Store
Get it on
Google Play
Available across Germany · Free to start
9:41
InstaBrief
New letter
What do you need written today?
Describe the situation in plain language. InstaBrief drafts a formal letter you can edit, address, and send by post.
Common briefs
Cancellation
Cancel my gym membership at the end of the notice period.
Formal notice
Notify my landlord that the heating system has been broken.
Describe what you need written…
InstaBrief
Drafting…
Cancel my gym membership at the end of the notice period.
Describe what you need written…
Drafting…
✕
01
Review
02
Address
03
Send
Letter · Draft V1
Subject
Body
★Refine with AI
Uses current text
e.g. Make the tone warmer, add a 14-day deadline.
Warmer
Shorter
Add deadline
Continue to addresses
Scroll
How it works

Three steps to a sent letter.

Scroll to see the app respond. The phone follows along as we walk through each stage of the flow.

Step 01 · Brief

Tell us what you need written.

Describe your situation in plain language, or pick one of the common starting points. InstaBrief understands German legal vocabulary, tenancy law, consumer rights, and the conventions of formal correspondence.

Avg. brief
2 sentences
Languages
DE · EN
Account
Not required
Step 02 · Refine

Edit inline. Or just ask for changes.

The draft appears in seconds. Tap any line to edit directly, or refine by chat: "make it shorter", "add a 14-day deadline", "more formal". The AI rewrites using your existing draft as context, never from scratch.

Format
DIN 5008
Revisions
Unlimited
Streaming
Live as you type
Step 03 · Send

We print, stamp, and post it for you.

Add the recipient and we'll handle the rest: printed, folded, stamped, and dropped at Deutsche Post the same business day. Or download a print-ready PDF for free and post it yourself.

Standard
€4,99 · 1–3 days
Einschreiben
€7,99 · tracked
PDF
Free · always
9:41
InstaBrief
New letter
What do you need written today?
Describe the situation in plain language. InstaBrief drafts a formal letter you can edit, address, and send by post.
Common briefs
Cancellation
Cancel my gym membership at the end of the notice period.
Formal notice
Notify my landlord that the heating system has been broken.
Describe what you need written…
9:42
Saved · Just now
✕
01
Review
02
Address
03
Send
Step 01 · Review
Review the draft.
Use Edit to type yourself, or ask InstaBrief to refine the draft.
Letter · Draft V1
SubjectEdit
Cancellation of Gym Membership
BodyEdit
Dear Sir or Madam, I am writing to formally cancel my gym membership (Contract No. FL-2048291) at the earliest opportunity permitted under the contractual notice period. Please confirm the effective termination date in writing within 7 days.
312 characters~1 min read
★Refine with AI
Uses current text
e.g. Make the tone warmer, add a 14-day deadline.
Warmer
Shorter
Add deadline
Continue to addresses
9:44
‹Back
Saved · Just now
✕
01
Review
02
Address
03
Send
Step 03 · Send
Ready to go.
Send it for us, or download a PDF.
Alex Morgan · 15 Station Rd · London E1 6RF
FitLife Gym Ltd Membership Services 42 Fitness Way London EC2A 4PQ
London, 06.05.2026
Cancellation of Gym Membership — Contract No. FL-2048291
Dear Sir or Madam,
I am writing to formally cancel my gym membership at the earliest opportunity permitted under the contractual notice period.
Please confirm the effective termination date in writing within 7 days of receipt.
Yours faithfully, Alex Morgan
Proportions adjusted for screen. Printed letter follows DIN 5008.
+ Add signature
I'll handle it
Download a print-ready PDF · Free
↓
Postage class
Standard post
Delivered 1–3 days
€4,99
Registered · Einschreiben
1–3 days, tracked, signed for
€7,99
Total€4,99
Send for €4,99
Features

Built for the letters that matter.

The ones you've been putting off for weeks because you didn't know where to start.

Letter · Draft V1
SubjectEdit
Cancellation of Gym Membership
BodyEdit
Dear Sir or Madam, I am writing to formally cancel my gym membership (Contract No. FL-2048291) at the earliest opportunity permitted under the contractual notice period. Please confirm the effective termination date in writing within 7 days.
Formal by default.

Every draft follows German formal letter conventions: DIN 5008 layout, correct salutations, legally appropriate language for disputes, cancellations, and notices.

Step 03 · Send
Ready to send.
Postage class
Standard post
Delivered 1–3 days
€4,99
Registered · Einschreiben
1–3 days, tracked, signed for
€7,99
Total€4,99
Registered post option.

Send as Einschreiben (tracked, signed for) for documents that need a paper trail: notice of termination, formal complaints, legal notices, and debt disputes.

Step 03 · Send
Ready to go.
Send it for us, or download a PDF.
I'll handle it
Download a print-ready PDF · Free
↓
TotalFree
Download for free.

Always free to draft and download. A print-ready A4 PDF, DIN 5008 formatted, with window-envelope-aligned address blocks and a fold guide. No subscription needed.

What do you need written today?
Common briefs
Cancellation
Cancel my gym membership at the end of the notice period.
Formal notice
Notify my landlord that the heating system has been broken.
First draft in seconds.

Describe your situation in plain language and InstaBrief generates a complete, formally structured letter in seconds: correct salutation, DIN 5008 layout, legally appropriate tone included.

BodyEdit
Dear Sir or Madam, I am writing to formally cancel my gym membership at the earliest opportunity permitted under the contractual notice period.
★Refine with AI
Uses current text
e.g. Make the tone warmer, add a 14-day deadline.
Warmer
Shorter
Add deadline
Refine with AI.

Not quite right? Tell InstaBrief what to change in plain language, or tap a chip. The AI refines the existing draft using your text as context, never from scratch.

Privacy
Yours alone.
✓
No account required
Start writing immediately
✓
No tracking
Sessions are anonymous by default
Anonymous by default.

No account required to start writing. Sessions are anonymous and ephemeral unless you choose to save your letters. Your drafts are yours alone.

24/7
Available any time
< 5 min
Average time brief → posted
DE
Sending available in Germany

Free to start · no account required

Stop putting off
the letter you need to send.

It takes less than five minutes. The hardest part is opening the app.

Download on the
App Store
Get it on
Google Play