I've had success using the self-service tier from Ably.com, which is <$100 USD/mo. [1] Their client libraries handled most of the edge-cases that I would have

I've had success using the self-service tier from Ably.com, which is <$100 USD/mo. [1] Their client libraries handled most of the edge-cases that I would have had to worry about using SQS or a message broker on my own. It seems like they're scaling using sensible technologies on the back-end and have very approachable pricing for early-growth projects compared to some of the enterprise focused alternatives. [1] https://ably.com/pricing https://ably.com/pricing