First of all, the definition of "cruelty-free" is much different in Hinduism, compared to the one envisaged by the modern notion of Veganism.
When a Hindu takes the products from a cow, especially the Milk, there are protocols to be followed in reference to the newborn Calf and her necessities, only that kind of milk is to be consumed. Perhaps the modern concept of capitalistic dairy farming is what drives modern Veganism, but the Hindu idea of animal care is already "cruelty-free".
Refer - Consuming milk and dairy causes bad karma? & What is the moral stance towards milking of animals/cows?, to understand how milk derived from a cow is "cruelty-free", as per Hinduism perspective.
In any case, a practicing Hindu, from ancient scriptures and orthodox perspectives can not be a Pure-Vegan, owing to the essential requirement of the sacred cow and products derived from her viz. (milk, ghee, butter, urine, and dung), which are compulsorily utilized in several formulations like pancha-gavya and panchamrita, as I discuss here.
Although the Skanda Mahā-Purāṇa does provide a vegetarian lifestyle arrangement for the Vaishnavas, or in general for everyone too perhaps, but an average Hindu cannot do away with cow products (which are to be derived from the cow in specific dharmika ways, not otherwise).
I'm quoting some relevant verses from Chapter 6 - Fall of Uparicara Vasu: Section 9 - Vāsudeva-Māhātmya in the Book 2 - Vaiṣṇava-khaṇḍa of Skanda-Purāṇa. Full chapter can be read from the link for a complete understanding of the context.
महर्षय ऊचुः ।
....
रजस्तमोदोषवशात्तथाप्यसुरपा नृपाः ।
मेध्येनाजेन यष्टव्यमित्यादौ मतिजाड्यतः ।
छागादिमर्थं बुबुधुर्व्रीह्यादिं तु न ते विदुः ॥ १६ ॥
The great sages said:
- Kings, rulers of Asuras, however, due to the fault of Rajas and Tamas, and
dullness of intellect, take ‘a he-goat’ etc. as the meaning
of “Aja” in the injunction “sacrifice should be performed with a
sacrificial Aja.” They did not know Vrīhi (rice) etc. (which is its
meaning).
सात्त्विकानां तु युष्माकं वेदस्यार्थो यथा स्थितः ।
ग्रहीतव्योन्यथा नैव तादृशी च क्रियोचिता ॥ १७ ॥
- In your case, who are created out of Sattvaguṇa, the true meaning of
the Vedas should be accepted. Otherwise, that kind of performance
(involving violence) is not at all proper.
...
सात्त्विकानां हि वो देवः साक्षाद्विष्णू रमापतिः ।
अहिंसयज्ञेऽस्ति ततोऽधिकारस्तस्य तुष्टये ॥ १९ ॥
- To you who are Sāttvikas the god is directly Viṣṇu, the consort of Ramā.
For his gratification, one is authorized to perform a Yajña which
does not involve any violence.
प्रत्यक्षपशुमालभ्य यज्ञस्याचरणं तु यत् ।
धर्मः स विपरीतो वै युष्माकं सुरसत्तमाः ॥ २० ॥
- The performance of a sacrifice by actually killing a beast, is contrary to
Dharma in your case, O excellent Suras.
रजस्तमोगुणवशादासुरीं संपदं श्रिताः ।
युष्माकं याजका ह्येते सन्त्यवेदविदो यथा ॥ २१ ॥
- These performers of sacrifice on your behalf have resorted to Asura type of
performance due to their being subjected to Rajas and
Tamas Guṇas. They are ignorant of Vedas.
....
राजसानां तामसानामासुराणां तथा नृणाम् ।
यथागुणं भैरवाद्या उपास्याः सन्ति देवताः ॥ २३ ॥
- For Asuras and human beings, characterised by Rajas and Tamas Guṇas, there
are deities like Bhairava and oṃers, worthy of being
propitiated according to the Guṇas (of the devotees).
स्वगुणानुगुणात्मीयदेवतातुष्टये भुवि ।
हिंस्रयज्ञविधानं यत्तेषामेवोचितं हि तत् ॥ २४ ॥
- In this world, for the gratification of one’s deity of suitable guṇa,
conforming to one’s own (i.e. devotee’s) guṇa, the performance
of sacrifice involving violence is enjoined for them.
तत्रापि विष्णुभक्ता ये दैत्यरक्षोनरादयः ।
तेषामप्युचितो नास्ति हिंस्रयज्ञः कुतस्तु वः ॥ २५ ॥
- Even out of them, for the Daityas, Rākṣasas and human beings who are devotees of Viṣṇu, Yajña involving violence is not proper. How can it be so, in your case?
...
सात्त्विकानां देवतानां सुरामांसाशनं क्वचित् ।
अस्माभिस्त्वीक्षितं नैव न श्रुतं च सतां मुखात् ॥ २७ ॥
तस्माद्व्रीहिभिरेवासौ यज्ञः क्षीरेण सर्पिषा ।
मेध्यैरन्नरसैश्चाऽन्यैः कार्यो न पशुहिंसया ॥ २८ ॥
- Consumption of liquor and eating of flesh by Sāttvika deities is neither seen
by us nor heard from the mouths of saintly people
anywhere.
- Hence this sacrifice should be performed with rice, milk, ghee and other
foodstuffs fit for being used in sacrifices, and not with the
killing of beasts.
This story, along with endorsement of ahiṃsa and thus it's pro-vegetarian stance
is also found in:
To Conclude -
- Since cows are indispensable to the Hindu way of life - philosophically, ritually, and theologically, and her products are tantamount to most rituals and worship, thus, Hinduism does not promote the idea and concept of Pure-Veganism (for an average, non-sannyasi, in general, a normal practicing Hindu), and hence, as such, there are no "cruelty-free" substitutions to the Cow and products derived from her.
