Can AI create the perfect email signature? Testing ChatGPT and Gemini in gSignature

Email signature as a micro-space for communication

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An email signature is not just a block of text with your first and last name and phone number. It is a micro-space for communication that can:

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• reinforce the visual identity of a brand,
  

• maintain a consistent tone of communication,
  

• direct recipients to content (offers, events, reports),
  

• and subtly build relationships.

That's why testing AI in this space is more than just fun—it's a practical question about the future of digital communication.

What did the test look like?

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We prepared identical commands for ChatGPT and Gemini:

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👉 “Generate a professional email signature in HTML, including first name, last name, job title, company logo, social media buttons, and CTA.”

To test their capabilities, we also asked for several variants: minimalist, creative, and elaborate.

Results – ChatGPT

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✅ Strengths:

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• Very fast response and correct HTML.
  

• Versatile templates, easy to implement.
  

• Signatures work well on mobile devices (RWD).
  

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❌ Limitations:

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• Often generates schematic layouts, not very creative.
  

• Requires manual branding adjustments (colors, logo, fonts).
  

• Lack of marketing “flavor” – e.g., the CTA was too generic.
  
  

Results – Gemini

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✅ Strengths:

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• High creativity – interesting layouts, original welcome phrases.
  

• Better language matching to the industry (formal vs. casual).
  

• Suggestions for additional content (e.g., slogans, links to events, banners).
  

• Generates signatures closer to real marketing projects.
  

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❌ Limitations:

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• HTML was sometimes less precise – corrections needed in the generator.
  

• Sometimes graphics were too large or there were problems with social icons.
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Conclusions from the comparison

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• ChatGPT – great for a quick, technically correct start.
  

• Gemini – better in the creative phase when a more marketing-oriented approach is needed.
  

• AI + gSignature = the fastest way to a professional signature. AI provides inspiration and saves time, while gSignature ensures optimization and full control over branding.
  

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What's next?

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💡 The future of gSignature with AI is not only about generating signatures, but also automatically testing their compliance with:

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• RWD,
  

• WCAG,
  

• brand book.
  

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This way, every user – regardless of their knowledge of HTML – can create a perfect email signature in just a few minutes.

👉 Do you think AI could take over signature creation in your company?

Let us know which version you prefer – ChatGPT or Gemini?

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