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Twilio charges $0.0083 per SMS segment in the US as of 2026, but that sticker price is not what lands on your bill. Carrier pass-through fees ($0.0025 to $0.0062 per segment), A2P 10DLC registration charges, number rental, and multi-segment messages typically push the real delivered cost to $0.012 to $0.025 per message, roughly 1.5x to 3x the advertised $0.0083.
Stripe's US rate in 2026 is 2.9% + $0.30 per online card charge with no monthly fee, but the flat 30-cent fee and five add-on meters (international +1.5%, currency conversion +1%, instant payouts 1.5%, disputes $15, Billing 0.7%) push most businesses to an effective 3.2% to 13%. Your real rate is a function of your average order value and how you get paid.
Railway's $5 and $20 plans are usage floors, not your bill. Here is the real 2026 metered invoice at three app sizes, from a $5 side project to a $278/month scaled product.
Auth0's free tier is 25,000 MAU, but the moment a real app needs one paid feature the meter starts near $0.07 per user. A numbers-first 2026 teardown across four app profiles, with the SSO wall and cheaper alternatives priced out.
Supabase Pro is $25 in 2026, but a growing SaaS paid $333 in a real month. A numbers-first 30-day bill across four cohorts, with compute, MAU, and egress itemized.
