Tier 1 is good, but caring about 300-500 euros is not a "tier 1" sort of budget for pretty much anything. You can't get a reasonable amount of AWS compute for t

Tier 1 is good, but caring about 300-500 euros is not a "tier 1" sort of budget for pretty much anything. You can't get a reasonable amount of AWS compute for that for example. I'd look into country specific providers. They tend to be much cheaper, and the APIs often won't be terrible. SMS has the advantage of being fairly straightforward too (where say, payments is not). I've used Twilio and I've used a local alternative, and there was really very little difference in practice for a startup level of reliability and feature set. The trade-off with local providers is time, and the bootstrap trade-off is time instead of money, so they're well aligned.