Fivetran will build a Streak integration if you bring a customer who will use it (sometimes as little as one): https://fivetran.com/docs/by-request-program

Mostly Fivetran, a little Airbyte, and a few custom integrations. Would love to add Streak (can you get it into Fivetran? We can usually crank those integrations out within an hour.)

p.s. I was a massive Streak user at a previous (sales-driven) startup. Big fan!