MailTail vs Opensense
Simple signatures without the enterprise sales process
Feature Comparison
| Feature |  MailTail | |
|---|---|---|
| Outlook Add-in (Desktop & Web) | ✓ | ✓ |
| Microsoft 365 / Entra ID | ✓ | ✓ |
| Visual Signature Editor | ✓ | ✓ |
| Dynamic User Data | ✓ | ✓ |
| User & Group Assignments | ✓ | ✓ |
| Free Trial | 14 days | 14 days |
| Setup Time | Minutes | Hours |
| Price per user/month | £0.57 | £0.79 |
Pricing Comparison
Based on 100 users
Opensense
£948 per year
- ✓ Outlook signatures
- ✓ Entra ID integration
- ✓ Visual editor
- ✓ Group assignments
MailTail
£684 per year
- ✓ Outlook signatures
- ✓ Entra ID integration
- ✓ Visual editor
- ✓ Group assignments
- ✓ Setup in minutes
- ✓ Responsive human support
Why Teams Switch from Opensense
Simpler Pricing
Flat £0.57/user. No tiers, no minimums, no sales calls to get a quote.
Focused on Outlook
We do Outlook signatures for Microsoft 365 and do it well. No feature bloat.
Quick Setup
Deploy via Outlook add-in in minutes. No complex server configuration.
Human Support
Small team, real responses. Email us and talk to someone who can help.
How Opensense works
Opensense is a server-side email signature and marketing platform. It processes your outgoing emails to add signatures, banner ads, and tracking pixels. Their platform focuses heavily on marketing use cases like click tracking, A/B testing signature banners, and lead generation.
MailTail is client-side. Signatures are applied in the Outlook compose window before you send. There is no server-side processing, no email routing changes, and no tracking pixels unless you specifically add them. Your email data stays between you and your recipient.
Opensense pricing
Opensense does not publish pricing on their website. To get a quote, you need to go through their sales team, which typically involves a demo call and a proposal process. This enterprise sales approach can take days or weeks before you have a number.
MailTail pricing is on the website: £0.57/user/month. Sign up, start your trial, and decide if it works for you. No sales calls, no proposals, no waiting. You can be deploying signatures within 15 minutes of finding the site.
Marketing platform vs signature tool
Opensense positions itself as an email marketing platform that happens to do signatures. Their features lean heavily into marketing automation: signature banner campaigns, click analytics, calendar scheduling links, and CRM integrations. If your marketing team drives the signature strategy, these features may be valuable.
MailTail is a signature management tool for IT teams. It does signatures, does them well, and does not try to be a marketing platform. If your goal is consistent, branded Outlook signatures across your organisation without the marketing overhead, MailTail is the simpler path.
Who is Opensense built for?
Opensense is built for marketing-led organisations that want to use email signatures as a marketing channel. Their ideal customer has a marketing team running signature banner campaigns and tracking engagement metrics.
MailTail is built for IT teams and small businesses that want professional signatures deployed quickly and managed centrally. If you need Entra ID integration, group assignments, and an Outlook add-in that works across desktop, web, and mobile, MailTail delivers that without the sales process or marketing complexity.
Switch in Under 30 Minutes
Sign up for MailTail
Start your 14-day free trial.
Import your signatures
Copy your existing HTML signatures or create new ones in our editor.
Assign to users & groups
Use your existing Entra ID groups - no manual user management.
Deploy the Outlook add-in
One-click deployment via Microsoft 365 admin center.
Cancel Opensense
Once you're happy, cancel your Opensense subscription.
Ready to Switch?
Try MailTail free for 14 days. Keep using Opensense during your trial - switch when you're ready.
Start Free TrialSignatures applied instantly · Cancel anytime