How to migrate from Heroku to a multicloud PaaS in 2026
Blog post from Upsun
Salesforce announced in February 2026 that Heroku will enter sustaining engineering mode, retaining service for existing customers but ending new feature development and new Enterprise contracts, prompting teams to consider long-term migration plans despite no announced shutdown date. The post presents Upsun Cloud as a multicloud PaaS alternative that can deploy the same application configuration across AWS, Azure, Google Cloud, IBM Cloud, and OVHcloud, contrasting it with Heroku and other single-provider platforms. It argues that most migrations do not require rewriting application logic because Heroku Procfile processes, dynos, config vars, add-ons, databases, and Review Apps can be translated into Upsun Cloud services, containers, environment variables, managed PostgreSQL, and preview environments. Differences highlighted include native persistent storage, containers that restart on deployment rather than a fixed daily cycle, no imposed 30-second request timeout, and provision-based resource pricing. The post identifies PostgreSQL data transfer as the principal migration risk and recommends testing dump-and-restore procedures against production clones, verifying each third-party integration, validating workloads before DNS cutover, and beginning with a smaller non-critical application rather than migrating all systems at once.
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