Which crowdfunding platform to choose?

Question

Computer networks

Firework!
Colleagues, tell me some crowdinvesting / crowdfunding platform for creating a service with crowdinvesting.
Considered both paid and open source. Working with Russian payment systems
One of the main criteria is the project implementation period so that it can be deployed / tried out faster.

Answer 1

Only to order.

Answer 2

Where?
These are piece things.
Those who are successful are few, they have their own platforms.
Those who are not successful - why do you need their platforms?