UK hybrid mail platform
Send letters online, not through the post office.
Upload a PDF, trigger from your CRM, or call the API. We print on premium paper, seal in branded or plain envelopes, and post through Royal Mail — same day if you upload before 3pm. From 84p a letter including postage.
How it works
From your screen to their letterbox.
Upload your PDF
Drop it in a hotfolder, trigger from your CRM, or call the API.
We print & seal
Premium paper, folded and sealed in a branded or plain envelope.
Royal Mail posts it
Handed to Royal Mail the same day if you upload before 3pm.
Three ways to handle addresses
How your recipient addresses get into the system depends on what fits your workflow:
Window extraction. If your PDF already has the address in a standard window-envelope position, we extract it automatically. Common for transactional mail like invoices, statements, and notices from accounting or CRM systems.
CSV merge. Upload your letter document once plus a CSV of recipients. We merge and mail at volume. Ideal for bulk notices, rent demands, or any mailing where the content is similar but recipients vary.
API payload. Pass content and recipient details as structured JSON via the Intelliprint API. Cleanest option for automated workflows where letters are generated programmatically.
Envelope formats
Right size for what you're sending.
C5 (standard)
Letter envelope for up to 6 sheets. The default choice for one-to-few-page correspondence. From 84p.
C4 (large)
Larger format for documents that shouldn't be folded — contracts, certificates, bound pages. From £1.61.
C4+ padded
Padded envelope for items that need a bit more protection. From £4.09.
A4 box
Box-style packaging for thicker contents, up to a defined weight. From £8.21.
Designing your letter
Download a letter template before you start designing.
Letters go out through a C5 window envelope, so the address must sit in the right position on the page. Download a template that has the bleed, safe zone, and address position pre-marked — and the code string clear zone on A4 — so everything lands correctly first time.
A4 letter template
210×297mm. Includes the C5 window address position (23mm left, 43mm top) and the code string clear zone down the left margin. Template dimensions with bleed 216×303mm.
All design specifications
Full design specifications: bleed, safe zone, address position, code string clear zone, CMYK vs RGB, image resolution, file formats.
Six ways to send
Fit the workflow you already have.
Dashboard
Log in, upload, done. No install, no setup.
Print driver
Install once on Windows, then 'print to Intelliprint' from any application.
Hotfolders
Drop files into a watched folder and we pick them up automatically.
API
RESTful API for full programmatic control. Letters, postcards, direct mail — all one auth token.
Zapier
Trigger letters from 8,000+ apps via our official Zapier app.
n8n
Official community node for self-hosted and cloud n8n workflows.
FAQ
Common questions about hybrid mail.
How much does it cost to send a letter?
From 84p per letter, including printing, envelope, and 2nd Class postage. No setup fees or monthly minimums. Full rates — including 1st Class, Signed, and Special Delivery — on our pricing page.
How quickly will my letter be posted?
Documents uploaded before 3pm are printed and posted the same day. After 3pm they go out with the next working day's mail. Royal Mail delivery times then apply — 1st Class typically 1-2 working days, 2nd Class 2-3 working days.
Is it secure? What happens to my documents?
Documents are encrypted in transit, processed in our ISO 27001 certified facility (certification body 0120), and deleted after printing. We're GDPR compliant and hold ISO 9001 (quality) and ISO 14001 (environmental) certifications alongside 27001.
What file formats can I upload?
Most common formats: PDF, DOC/DOCX, XLS/XLSX, PPT/PPTX, JPG, PNG, TXT. PDF is recommended for best print results — fonts embedded, layout preserved, no surprises.
Can I send bulk mailings?
Yes. Upload one letter template and a CSV of recipient addresses. We merge and post at scale. No minimum volume, no bulk contract required — same platform for one letter or ten thousand.
Can I add my branding?
Yes. Upload your letterhead and it's applied automatically to your letters. For envelopes, branded or plain stock is available — configure once in your account.
Ready when you are
Start sending letters today.
Sign up free. No credit card required to create an account, no minimum order, pay per letter.