The Best Preview Environment Platforms in 2026

Author: Angelo Saraceno The competing listicles for preview environments are stuck in 2021. Most of them describe Heroku Review Apps as the gold standard and treat everything else as a variation on that theme. Heroku invented the category in 2015, then stopped iterating on it, and in February of this year Salesforce officially put the platform into sustaining-engineering mode ( reported Feb 2026 ). The frontier moved years ago. It moved toward PaaS platforms that treat per-PR environments as a n