Can non-Buddhists reach enlightenment?

Yes.
Anyone can reach enlightenment by practicing the meditation technique introduced in the article "How to meditate", whether they are Buddhists, follow another religion, or have no faith at all.
This is because "reaching enlightenment" is a psychological and medical phenomenon, not inherently religious.

What Does "Reaching Enlightenment" Mean?

Originally, reaching enlightenment did not mean going to the afterlife or becoming a god-like being in a religious sense.
Instead, it refers to attaining a specific mental state through meditation.

What Happens When You Reach Enlightenment?

Enlightenment brings about a rapid and profound transformation in your perception and experience of the world, leading to deep inner peace.
For more details, see the article "What happens when you master meditation?".
However, rather than trying to understand enlightenment through words, the best way is to experience it yourself through meditation.

How to Reach Enlightenment Through Meditation

Try practicing the meditation technique introduced in the article "How to meditate" for 10 to 20 minutes daily.
You may notice significant improvements in your mental state within a few months, or sometimes even within a day.
Since this is a transformation that cannot be experienced without meditation, you will naturally realize when you have reached enlightenment.