Best notification infrastructure

Strongest workflow engine and SDK coverage.

Open-source champion. Self-host or cloud, with BYO providers for email delivery.

Lower paid entry than most peers, with preferences, batching, digests, and multi-tenant options.

Visual journeys; bridges product and marketing notifications.

Event-trigger billing and a 10,000-trigger free plan make pricing predictable.

Strong notification inbox fit, though the free tier is smaller and paid entry is steep.