There are a few companies such as Spaceflight[1] that partner with launch providers such as ISRO[2][3] to offer rideshare and dedicated launches at much cheaper prices.
They are cheaper only for nano satellites. From your first link it costs 295k$ for 10kg to LEO. With spaceX you can send up to 200 kg to LEO for 1M$. It’s 20 times the payload for ~3 times the price.