Is Heroku's Private-0 the best deal?

Before you switch

• Heroku's 99.5% SLA on Essential tier is a reliability cliff vs. Standard/Premium; verify your uptime tolerance before committing.
• Private Spaces carry a 2-3x network-isolation premium over common runtime; confirm whether you actually need this isolation.
• Heroku Advanced tier pricing is not published; contact sales may reveal further lock-in or surprise costs.
• Row/connection limit overages on Heroku Postgres can force unplanned tier upgrades; monitor usage closely or choose a provider with more generous limits.
• Performance dynos require established billing history; if you are a new account, you may be blocked from provisioning until history is built.
• All alternatives listed are single-node or shared; if you need HA, confirm the multi-node cost multiplier (typically 2-3x) before switching.