About Kyte

Kyte tells you how effective your email subject lines are going to be; it helps you craft better subject lines by letting you pick words that boost the open rate of your emails.

There’s nothing quite like Kyte. You subscribe to the product and upload past subject lines and their open rates, which is used to train Kyte to your particular business context. Within few business days, you’re ready to go – you type in your subject line and boom, Kyte gives you an open rate prediction (to an accuracy exceeding 95% in some cases)!


Kyte gives you A/B test results without actually having to do A/B tests.


Kyte keeps you updated on trends it’s been noticing.


Kyte searches your history based on keywords.


Kyte uses Machine Learning and AI algorithms, developed by some of the best minds in the field. There’s algorithms for deconstructing subject lines into features, for predicting open rates, for recommending words and phrases, and for giving you trends in subject lines across industries.

Why Kyte?

Kyte works

One of the largest private banks in the world uses Kyte and has seen its open rates increase by 60%!

Kyte is future ready

It uses learning algorithms to constantly improve it’s prediction and recommendations.

Kyte is bespoke

It learns from your data and trains itself to give you recommendations that are tuned to your context.


"Kyte - the AI based subject line optimization solution from Cartesian has helped us up our email game significantly. It solves the subject line problem for email really well for us and this has translated into seeing a huge jump of 60% delta in average open rates across all our email campaigns in a very short span of time. We’ve been using it for some time now and are looking forward to the new features that Cartesian will be adding to Kyte soon. We would strongly recommend Kyte to every organization that wants to leverage email marketing!"

Rohit Raina
DVP & Vertical Head, Marketing Communication, HDFC Bank

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