Jainism counters Advaita Vedanta on the level of metaphysics by saying that reality is many-faceted, not absolutely one undivided consciousness.

Core Jain position

Jainism accepts:

• Anekāntavāda: reality has many aspects
• Syādvāda: any statement about reality is true only from a certain standpoint
• Nayavāda: different viewpoints reveal different partial truths

So, from Jain view, a doctrine that says only one absolute reality exists and that the world of multiplicity is ultimately unreal conflicts with the Jain understanding that:

• jīva and ajīva are both real
• souls are many, not one
• bondage and liberation are meaningful because the soul is a real individual substance
• the world is not a mere illusion

Where Jainism disagrees with Advaita

Jainism would object to these Advaitic claims:

1. Only Brahman is ultimately real

- Jainism says many eternal substances are real, not just one.

1. Individual soul is ultimately identical with the absolute

- Jainism says each soul is eternally distinct.

1. World of multiplicity is māyā / appearance

- Jainism says the world is real, though impermanent and changing.

1. Non-duality as the final truth

- Jainism says no single viewpoint can exhaust truth.

How Jainism critiques it

Jainism would say Advaita makes a one-sided absolute claim by treating one standpoint as complete truth. That is exactly what anekāntavāda rejects. From Jain perspective:

• If reality were absolutely only one without difference, then difference, bondage, karma, liberation, and ethical effort would lose real meaning.
• If all multiplicity is unreal, then the Jain path of purification would become difficult to justify.
• Any philosophy that denies real diversity is, in Jain terms, ekāntavāda — a one-sided doctrine.

Jain alternative

Instead of saying:

• “Only unity is real,”

Jainism says:

• “Reality has both unity and diversity depending on the standpoint.”

So the Jain answer is not to deny all unity, but to deny exclusive absolutism.

In short

Jainism counters Advaita Vedanta by saying:

• truth is multi-dimensional
• souls are अनेक, not one
• the world is real
• no single doctrine can claim total finality

That is why Advaita, in Jain philosophical terms, is seen as conflicting with the spirit of anekāntavāda.

If you want, I can also give this as a point-by-point Jain rebuttal in simple bullet form.