It’s easy to underestimate the tiny block of text and links at the bottom of your emails. But that small space, your email signature, can shape how clients perceive your business, influence trust, drive clicks, and even affect conversions.
This is where email signature software comes in.
In this guide, we’ll explore:
Email signature software allows businesses to create, manage, and deploy professional HTML email signatures at scale—without relying on manual copying, messy formatting, or inconsistent branding.
At its best, signature software provides:
The average employee sends over 10,000 emails a year. That’s over 10,000 brand impressions per person.
A consistent, professional email signature can:
Yet most businesses still manage signatures manually, leading to inconsistencies, lost opportunities and ongoing admin headaches.
At Email Signature Rescue, we’ve built two signature software platforms to meet different needs:
Best for: Individuals, small teams, and growing businesses
Key strengths:
Best for: Mid-to-large businesses, franchises, agencies, and IT-managed deployments
Key strengths:
Both ESR and SigStudio are backed by a robust signature deployment system:
And thanks to Picaura, our companion photo styling tool, your team photos can match the polish of your brand—every time.
| Feature | Free Generators | ESR | SigStudio |
|---|---|---|---|
| Multi-user management | ❌ | ✅ | ✅ |
| Central dashboard | ❌ | ✅ | ✅ |
| Auto-updating | ❌ | ✅ | ✅ |
| Hosted assets | ❌ | ✅ | ✅ |
| HTML customization | ❌ | ⚠️ Visual Only | ✅ Full Control |
| Company onboarding | ❌ | ✅ (Signature Key) | ✅ (Code + Magic Link) |
| Group templates | ❌ | Limited | ✅ |
| Bulk data management | ❌ | ❌ | ✅ |
We offer flexible monthly and yearly billing, with no hidden fees.
Try ESR now
Request free trial for SigStudio
Your email signature is one of the most visible, repeatable touchpoints your team has with the outside world. It’s part of your digital brand. It builds trust. It drives traffic. And when managed correctly, it turns every email into a marketing opportunity.
Whether you need a plug-and-play solution for your team, or enterprise-grade signature deployment at scale, Email Signature Rescue and SigStudio give you the tools to make it happen—fast, beautifully, and reliably.
Small detail. Big brand impact.
That’s the power of great email signature software.
Create and manage email signatures without the complexity.
Simple but powerful email signature software for small to medium businesses that don't want to deal with complicated server setup and IT staff.
One admin creates and deploys signatures out to End Users by email. End users install signatures directly into email software using API keys and HTML files.
Create, manage, and deploy email signatures across your team with our powerful email signature software management platform.
Create beautiful email signatures with our easy-to-use editor.
Everything you need to manage your email signatures in one place.
Create, update and deploy signatures from your Dashboard. Deploy Signature Keys and HTML files to your team in one click.
Upload, resize & circle-crop images. Add banners, icons, logos and profile images. Apply images across all signatures, update one to update all.
No server access or IT staff required. End Users simply install signatures directly into email software using provided Signature Keys or HTML.
Email Signature Rescue includes everything your small business needs to create, manage, deploy and install HTML email signatures for your team.
Choose from 1000's of icons, 20+ colors, lots of styles and sizes. You can even BYO icons or create your own.
Windows, MacOS and Browser Installer Apps and Extensions allow you to automatically install signatures.
Simple setup requiring no server access and no IT staff, your email privacy guaranteed.
Easily create, update and customize signatures for all your staff with a full featured Online Editor.
Simply add a vcard icon to any email signature to add a vcard file based on the contact details in the email signature automatically.
Add legal disclaimers with a read more link, GDPR statements and other compliance messages to your email signatures.
Add eco messages to your email signatures like think before you print and go green read it on the screen.
Upload your promotional banners to Default Images and apply them to all signatures. Change it once and it changes across all signatures.
Access to our free creative tools to make your own Promotional Banners, Social Media Icons and Video Thumbnails.
You can have your signatures setup today, no IT staff required. Simply create, send and install.
No HTML knowledge required, use our Online Editor to customize and change your signatures.
Easily add Google Analytics tracking to any link in your email signatures that links to where you have Google Analytics installed by ticking a box.
We offer 100's of professional pre-designed HTML email signature templates, tested across all email clients for cross compatibility.
Choose from 1000's social media icons in different colors, styles and sizes for Facebook, X, Instagram, Tiktok, Youtube + more. Or BYO social icons.
Change your social icons for holidays. Christmas trees, baubles, stars for an holiday-themed email signature, bats, ghosts and pumpkins for a Halloween themed signature.
Inject HTML rather than install it using our browser extensions to bypass character limits in Gmail, Outlook and other online software.
Maintaining consistent email signatures across various email clients and devices for all team members is essential for presenting a unified brand identity.
Admin deploys Signature Keys and HTML files out to your team with just one click from the Online Dashboard.
Our Installation Software syncs with your Email Signature Rescue Online Dashboard to automatically install and update your email signatures across your desktop and web email clients.
Install our Chrome browser extension to automatically update your signature in Gmail and other web-based email clients.
Overrides the character limit applied in Gmail on signatures
Supports Automatic Updates: any updates made from your online dashboard will automatically apply to your email signatures.
Supports Key Install: Grab your Signature Key from your Dashboard or from the email sent by your Admin and paste it into the app to automatically install your signature for you.
Install our Chrome browser extension to automatically update your signature in Gmail and other web-based email clients.
Overrides the character limit applied in Gmail on signatures
Supports Automatic Updates: any updates made from your online dashboard will automatically apply to your email signatures.
Supports Key Install: Grab your Signature Key from your Dashboard or from the email sent by your Admin and paste it into the app to automatically install your signature for you.
Download our Installer app for Windows 10/11, paste in your Signature Key and your signature will be installed and automatically updated.
Overrides the character limit applied in Gmail on signatures
Supports Automatic Updates: any updates made from your online dashboard will automatically apply to your email signatures.
Supports Key Install: Grab your Signature Key from your Dashboard or from the email sent by your Admin and paste it into the app to automatically install your signature for you.
Install our custom Add-In for New Outlook and Classic Outlook on Windows, MacOS and Web (365 accounts only) to automatically update your signature across desktop and web.
Overrides the character limit applied in Gmail on signatures
Supports Automatic Updates: any updates made from your online dashboard will automatically apply to your email signatures.
Supports Key Install: Grab your Signature Key from your Dashboard or from the email sent by your Admin and paste it into the app to automatically install your signature for you.
Install our macOS app, enter your Signature Key, and your signature will be automatically installed and kept up to date.
Overrides the character limit applied in Gmail on signatures
Supports Automatic Updates: any updates made from your online dashboard will automatically apply to your email signatures.
Supports Key Install: Grab your Signature Key from your Dashboard or from the email sent by your Admin and paste it into the app to automatically install your signature for you.
Install our Chrome browser extension to automatically update your signature in Gmail and other web-based email clients.
Overrides the character limit applied in Gmail on signatures
Supports Automatic Updates: any updates made from your online dashboard will automatically apply to your email signatures.
Supports Key Install: Grab your Signature Key from your Dashboard or from the email sent by your Admin and paste it into the app to automatically install your signature for you.
Install our macOS app and enable the Safari extension to automatically update your signature in Gmail and other web-based email clients on macOS.
Overrides the character limit applied in Gmail on signatures
Supports Automatic Updates: any updates made from your online dashboard will automatically apply to your email signatures.
Supports Key Install: Grab your Signature Key from your Dashboard or from the email sent by your Admin and paste it into the app to automatically install your signature for you.
Install our Firefox extension to automatically update your signature in Gmail and other web-based email clients.
Overrides the character limit applied in Gmail on signatures
Supports Automatic Updates: any updates made from your online dashboard will automatically apply to your email signatures.
Supports Key Install: Grab your Signature Key from your Dashboard or from the email sent by your Admin and paste it into the app to automatically install your signature for you.
We've been experts in email signatures since 2013, helping businesses create, manage, and install professional signatures across 60+ email clients, apps, and CRM platforms. With over a decade of experience, we’ve perfected a seamless, IT-free setup, with no coding, no hassle, just beautifully designed signatures that work. Let us handle the technical details so you can focus on what you do best.
Find Your Software IntegrationJoin our community of thousands of businesses worldwide who trust us to create, host, manage, and deploy their HTML email signatures across 60+ email clients, apps, and CRM platforms. With over 13 years of expertise, we’ve helped businesses navigate the complexities of email signature design, ensuring industry-leading, professional and polished signatures.