I'm not with Airbyte, but in previous companies we interviewed customers, and asked them to refer us to other people they know — "the crankiest, most opinionate

I'm not with Airbyte, but in previous companies we interviewed customers, and asked them to refer us to other people they know — "the crankiest, most opinionated, most unfiltered domain expert you can think of, please" was more or less how we phrased it, which often elicited a chuckle and an immediate recognition of who that person is in their life. Those are the best people to talk to — opinionated experts with no reason to sugar coat it for you. If you don't have customers, you have to prime the pump. If you have a board of directors, or investors, ask them for referrals. If you have a mailing list or newsletter, that's a great place to look too. If you have people who attend conferences, that's another place. You can also just swallow your pride and "cold-call" (or email, or DM) people, asking if you can have a few minutes of their time. If you are polite and respectful, you get a surprising number of positive responses. If the call goes well, ask them to tell you who their favorite cranks are, and go from there.