Pricing Plans
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Email information securely
Challenge recipient identity
Trusted by 180K+ users
Free
For light users
Use on the web or with Outlook
Pro
For professionals and teams
Use on the web or with Outlook
Enterprise
For high volume protection
Integrate with any email setup
Operating requirements
Mailock works with any modern web browser on any device. As long as your browser is up-to-date, there is a good chance you can use Mailock.
To use our Outlook add-in, you need the classic desktop version of Outlook for Windows (see how to check).
This commonly comes with Microsoft 365 Business Standard subscriptions or higher tiers. Standalone copies like Office 2019 also work.
Our add-in works with any actively supported version of classic Outlook on any supported version of Windows (see Microsoft's end of support documentation).
Mailock Enterprise plan holders can use secure email with any mail flow through a number of integration options with our support.
* Terms and conditions
- All prices exclude VAT.
- Fair usage policy applies to unlimited secure email quotas.
- Pro and Free plan users can reply to secure emails at no charge.
- Message expiry periods vary by plan as per the FAQ item below.
- Features, pricing, and data storage periods for enterprise plans vary based on infrastructure, requirements, and the package negotiated with our team.
Our Acceptable Use Policy and End User Agreement apply to all plans.
Easy to follow up
Our clients engage more with emails sent via Mailock. And we know when they’ve opened a document, making follow-ups easier.
Deb Owen
Administration Manager, Rapport FS
Full visibility
Mailock enables us to track when customers open messages, download attachments, and provides full proof of delivery.

Jordan Hindley
Head of Product, EQ
Easy integration
Integration was effortless—it took seconds, and we were seamlessly up and running the same day.
Annemarie Byrne
Head of Operations, MPA FM
Robust security
Mailock provides exceptional security around identity, ensuring that sensitive information reaches the correct recipient.

Mark Davies
MD, Westcoast Cloud
Effortless security
Mailock integrates seamlessly with our back-office systems and Outlook, making secure communication effortless.
Peter Brearley
Consultant Solicitor, Brearley Law
Protects clients
Mailock provides an additional layer of digital security that makes sure clients are protected from communication risks.
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Dave Newick
CEO, Arken
Easy to use
Mailock’s ease of use was a big winner for us. Even less technical staff found it simple to work with.
Tony Cartwright
Operations Supervisor, Genius WM
Ensures compliance
Mailock ensures compliance and client trust by securing our members' confidential communications.
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Adam Stretton
MD, The Right Mortgage
Scalable protection
With 700 advisers of varying technical experience, we needed a secure email system that was simple and easy to use.
Ben Allen
Compliance Officer, The Right Mortgage
Transforms communications
Implementing Mailock is a crucial step in transforming financial services communications.

Rob Beverley
Head of Marketing, EQ
Clients prefer it
Email is still the way most of our clients want to communicate. Mailock keeps those communications safe.
Sam Whybrow
Director, Thanks Wealth Planning
Strengthens experience
Protecting data while improving service quality is a top priority. Mailock strengthens security and customer experience.
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Rob Hudson
MD, Just Group
Plays well with Outlook
Integrating Mailock was simple. It works with Unipass and Outlook in such an intuitive way.
Andy Davies
Financial Adviser, Stonebridge Financial
A step to net zero
Eliminating the need for printed documents wasn't just about security—for us, Mailock is a crucial step toward net zero.

Ronnie Taylor
Chief Distribution Officer, Aegon
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FAQs
When do messages expire?
Secure email data is stored for a specific time period before it expires. This time period is based on the sender's Mailock plan.
Recipients can easily download a copy of a secure email and save it before it expires.
Expiry periods are as follows:
- Mailock Free accounts are limited to 21-day message expiry.
- Mailock Pro accounts are limited to 365-day message expiry
- Enterprise and Automated accounts have at least 365-day message expiry.
What is a recipient challenge?
Recipient challenges allow you to verify your recipients are the right people before they gain access to the secure emails you send them.
Mailock users can set a variety of challenge types for recipients, including:
- Q&A: Set a question unique to your recipient that they must correctly answer.
- SMS: Input your recipients' phone number to send a code to their mobile device.
- Unipass ID: Allow financial professionals to verify their identity using Unipass ID.
- ID&V: Request a document check using a passport or utility bill and driving licence (coming soon!).
What is the Outlook add-in?
The Mailock Outlook add-in for Windows adds secure email to your desktop.
Installing the Mailock Outlook add-in will enable the following features in your email client:
- Compose secure emails
- Set recipient challenges
- Track sent messages
- Revoke sent messages
- Surface trigger word alerts
- Auto-decrypt inbound secure emails
What is Unipass ID?
Unipass ID is a virtual pass that enables professionals to log on to multiple financial services platforms.
Linking your Unipass ID with your Mailock secure email account means you can use the same login method that you use on other financial services platforms to verify your identity on the Mailock network.
As Unipass ID is a professionally registered identity, Mailock users can also choose to "trust" others who have linked their Unipass ID when they send them secure emails.
What are trigger words?
All new Mailock accounts contain our preset list of trigger words that, if present in an unsecured email, will surface an alert asking you if you want to send a message securely.
Examples of these words include:
- 'Confidential'
- 'Sensitive'
- 'Investment'
With a Pro or Enterprise account, you or your company administrator can edit this preset list of trigger words to reflect your security policy.
What is the message tracker?
Mailock tracks your secure emails and provides you with a timestamped log of delivery and activity, including:
- Message opens
- Challenge attempts
The message tracker is available to view on the web or in Windows Outlook using our add-in.
What is automated bulk send?
Mailock Automated is an optional add-on to Mailock Enterprise that enables bulk delivery features for scaled customer communications.
With Mailock Automated, you can batch and deliver sensitive communications at high throughput.
It is optimal for statements or other documents that need to be sent out regularly to a large audience of customers.

Case studies
Take a look at
our case studies
See how we've transformed communications for businesses like yours.