I'm part of the effective altruism movement, and I'm an event organizer in Montreal. I have reviewed several charities on their transparency, evidence of positive impact, room for more funding, and other relevant criteria.

I can help you chose a charity for maximum impact. If you have a cause area preference, such as poverty alleviation, disaster relief, age-related diseases cure, animal welfare, long-term future of humanity, etc., I can also help you with choosing a charity in that specific cause area.