For the free tier, Brave is 1tps capped at 2000/month. Bing is 3tps capped at 1000/month. Kagi is 100 searches total. Not sure what you mean by "quite" expen

For the free tier, Brave is 1tps capped at 2000/month. Bing is 3tps capped at 1000/month. Kagi is 100 searches total. Not sure what you mean by "quite" expensive? If you are comparing to other services like Google, then of course Google's privacy cost is many orders of magnitude greater than free.