Purple Post
A secure messaging platform enabling residents to send and receive messages with approved contacts. All content is monitored and filtered for safety.
Visit the Purple Post websiteOverview
Every item of physical mail that enters an establishment has to be opened, checked and processed by hand. It is a known contraband route, a daily burden on mailroom staff and a source of delay for residents waiting to hear from the people who matter to them.
Purple Post is an ISO 27001 certified secure digital messaging platform built for custodial environments including prisons, secure hospitals and secure training centres. Residents exchange email-style and instant messages with approved contacts, with attachments and images handled under security controls. Integrated monitoring, moderation and audit tools give authorised staff clear oversight of every message, all on UK-hosted infrastructure.
Digital correspondence arrives in a fraction of the time of traditional post, helping residents maintain the family ties that support resettlement. It is the cheapest option for families to send photos into prison and costs less than posting letters or using legacy providers. Business intelligence and usage reporting show establishments exactly how the service is being used.
Key Features
Secure messaging
Content monitoring
Photo attachments
Contact approval
Audit trail
Keyword filtering
Why Purple Post
Cuts mailroom workload
Digital correspondence reduces reliance on physical mail handling and processing, freeing staff to focus on the people in their care rather than the post.
Strengthens safeguarding
Approved contact management, real-time moderation and content filtering keep every message safe, monitored and auditable.
Keeps families connected
Messages arrive faster and more reliably than traditional post, improving access to family and approved contacts and removing the cost barrier of physical mail.
Clear oversight
Message audit logs, review workflows and usage reporting give leadership a complete picture and support consistent policy enforcement across every message.
In Live Use
Purple Post is live at HMP Parc, HMP Rye Hill and HMP Five Wells. In 2026 its digital service launched as the first technology to let families share GIFs, emojis and multiple images digitally. At HMP Parc it forms part of the largest in-cell technology deployment in the UK private prison estate.
Cheapest
Way for families to send photos into prison
First
To let families share GIFs, emojis and multiple images
HMP Parc
Part of the UK's largest private-estate in-cell deployment
What Families Say
Our apps for families hold more than 10,000 ratings across the App Store and Google Play, averaging 4.8 out of 5.
Purple Post is rated 4.6 out of 5 from 300+ ratings on the UK App Store.
“You can buy bundle of postcards then write letters send up to 3 photos at a time as often as you like and it helps you to keep in touch with your loved ones it has to be a five star rating from me”
Noops45
“Just love this system just so instant and just perfect for quick contact”
LindylouV
“Really good better than other provided websites so good to keep loved ones updated on life”
S_hadx
Reviews quoted verbatim from the UK App Store
ISO 27001 (UKAS)
Certified
Cyber Essentials Plus
Certified
G Cloud 15
Crown Commercial Supplier
UK Hosted
Data Sovereignty
Interested in Purple Post?
Get in touch to arrange a demo or find us on the Digital Marketplace.