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  Email information securely
 Verify recipient identity
  Trusted by 300K+ users


Monthly
Annually
Email with lock icon orange

Free

For individual light users

Free

no card details required

up to 5 sends /month

Email encryption?Encrypt emails to prevent interception.
Email verification?Confirm recipients via a one-time code sent to their email.
Q&A challenges?Protect messages with a question only the correct recipient could answer.
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Enterprise

For high-volume contact

From £299 per company / month

billed monthly

contract dependent

Everything in Pro
Policy-based encryption?Automatic keyword and rule-based message security.
Automated delivery?High-volume secure delivery (e.g. statementing), where included in your package.
API control & monitoring?Automate challenges and get advanced analytics.
Enterprise support?Dedicated account manager for training/technical support.
Flexible deployment?Options include cloud/on-prem, single/multi-tenancy.
UKAS  ISO27001 compliant
CE Plus
CCS supplier
Certified B Corp

Scroll horizontally to compare plans.

Mailock plan feature comparison: Free, Pro, and Enterprise
Features Free Pro Enterprise
Sending
Secure sends per month 5 for Free Unlimited Fair use applies¹ for Pro Unlimited Volume-based pricing for Enterprise
Secure replies (recipient) Included in Free Included in Pro Included in Enterprise
Encrypted attachments Included in Free Included in Pro Included in Enterprise
Message expiry 21 days for Free 365 days for Pro 365+ days Configurable for Enterprise
Encryption
Message-level AES-256 encryption Included in Free Included in Pro Included in Enterprise
Policy-based / rule-based encryption Not included in Free Not included in Pro Included in Enterprise Keyword & rule triggers
Automated bulk encryption Not included in Free Not included in Pro Add-on Mailock Automated licence for Enterprise
Recipient authentication
Email verification (OTP) Included in Free Included in Pro Included in Enterprise
Question & answer challenge Included in Free Included in Pro Included in Enterprise
SMS authentication Not included in Free Included in Pro Allowance included² Included in Enterprise
Identity checks (IDV)3 Not included in Free Coming soon for Pro Included in Enterprise Subject to package
API-driven challenge automation Not included in Free Not included in Pro Included in Enterprise
Tracking & audit
Sent message tracker Not included in Free Included in Pro Included in Enterprise
Read notifications Not included in Free Included in Pro Included in Enterprise
MI / BI analytics Not included in Free Not included in Pro Included in Enterprise
Webhook integrations Not included in Free Not included in Pro Included in Enterprise Real-time event tracking
Message control
Message revoke Not included in Free Included in Pro By sender Included in Enterprise By sender or admin
Security alerts Preset Defaults for Free Custom Edit to match your policy for Pro Custom Admin-controlled for Enterprise
Access & integration
Mailock web app Included in Free Included in Pro Included in Enterprise
Outlook add-in (Windows) Included in Free Included in Pro Included in Enterprise
Microsoft 365 gateway integration Not included in Free Not included in Pro Included in Enterprise
Google Workspace integration Not included in Free Not included in Pro Included in Enterprise
API access Not included in Free Not included in Pro Included in Enterprise
CRM integration (e.g. Salesforce, HubSpot) Not included in Free Not included in Pro Included in Enterprise
Branding & admin
Custom branding Not included in Free Included in Pro Logo on recipient emails Included in Enterprise Full white-labelling
Multi-brand support Not included in Free Not included in Pro Included in Enterprise
Company admin portal Not included in Free Included in Pro Included in Enterprise
User management Not included in Free Included in Pro Included in Enterprise
Deployment
Cloud-hosted (EU storage) Included in Free Included in Pro Included in Enterprise
On-premises / dedicated server Not included in Free Not included in Pro Included in Enterprise
Single or multi-tenancy Not included in Free Not included in Pro Included in Enterprise
Support
Knowledge base & self-serve Included in Free Included in Pro Included in Enterprise
UK-based support team Included in Free Included in Pro Included in Enterprise
Dedicated account manager Not included in Free Not included in Pro Included in Enterprise
Onboarding & technical support Not included in Free Not included in Pro Included in Enterprise

General terms

  • All prices exclude VAT.
  • Pro and Free plan users can reply to secure emails at no charge.
  • Message expiry periods vary by plan (see more in the FAQ item below).
  • Features, pricing, and capabilities for Enterprise plans (including identity checks and automated delivery) vary based on infrastructure, requirements, and the package negotiated with our team.

Footnotes

  1. Mailock Pro is designed for normal secure email use by individuals and businesses. To protect the service for all users, fair usage controls apply to unusually high-volume, automated, or broadcast messaging activity unless this has been expressly agreed by contract. See our Acceptable Use Policy for more information.
  2. Mailock Pro includes 25 SMS authentications per licensed user per month. Additional SMS packs can be purchased if needed. SMS authentication is also available on Enterprise according to your package. See our Acceptable Use Policy for more information.
  3. Identity checks (IDV) are available subject to business approval and confirmation that your organisation meets the required data handling, compliance and security standards. On Enterprise, availability depends on your agreed package/contract. Support on Pro is coming soon.

Our End User Agreement and Acceptable Use Policy apply to all plans.

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.

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.

person icon for reviews
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
Jordan Hindley

Head of Product, EQ

Easy integration

Integration was effortless - it took seconds, and we were seamlessly up and running the same day.

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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
Mark Davies

MD, Westcoast Cloud

Effortless security

Mailock integrates seamlessly with our back-office systems and Outlook, making secure communication effortless.

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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.

dave newick
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.

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Tony Cartwright

Operations Supervisor, Genius WM

Ensures compliance

Mailock ensures compliance and client trust by securing our members' confidential communications.

adam s
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.

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Ben Allen

Compliance Officer, The Right Mortgage

Transforms communications

Implementing Mailock is a crucial step in transforming financial services communications.

rob b
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.

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Sam Whybrow

Director, Thanks Wealth Planning

Strengthens experience

Protecting data while improving service quality is a top priority. Mailock strengthens security and customer experience.

Rob h
Rob Hudson

MD, Just Group

Plays well with Outlook

Integrating Mailock was simple. It works with Unipass and Outlook in such an intuitive way.

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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
Ronnie Taylor

Chief Distribution Officer, Aegon

Talk to us? Get a demo?

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 let you verify recipients before they can open a secure email.

Depending on your plan, common options include:

  • Q&A: a question only the right recipient should be able to answer.
  • SMS: a code sent to the recipient’s phone (Pro and Enterprise).
  • Identity checks (IDV): document-based checks - coming soon on Pro; available on Enterprise subject to package and approval.

Separately, you can choose to trust recipients who have linked a Unipass ID. That isn’t a challenge type - it’s a trust option when sending. See “What is Unipass ID?” below.

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.

Rapport financial strategists in meeting looking at secure email on tablet

Case studies

Take a look at

our case studies

See how we've transformed communications for businesses like yours.