India's IT outsourcing industry spans a huge range of quality and specialization — the differentiators worth focusing on are demonstrated domain expertise relevant to your industry, transparent communication practices, and a genuine long-term partnership orientation rather than purely transactional delivery.
Check references carefully and ask specifically about how a potential partner has handled project challenges in the past — that reveals far more than a polished sales pitch.
Cantonet Technologies has built our reputation on exactly this kind of transparent, long-term partnership approach.