The difference is breadth
PostHog Workflows is intentionally close to product analytics. Ortto is intentionally broader. That makes this comparison less about who has a workflow builder and more about how much customer journey infrastructure the team wants to own.
If your workflow is a reaction to a PostHog cohort, keep it in PostHog until there is a reason not to. If your workflow needs a profile hub, campaign calendar, customer journey canvas, and marketing reporting, Ortto is built for that style of work.
PostHog is better for product-native action
PostHog Workflows is strongest when the moment is specific: a user did something, failed to do something, crossed a threshold, matched a cohort, or triggered an event worth sending somewhere.
Those workflows do not need a giant campaign system. They need the product signal to be accurate and the action to happen quickly.
Ortto is better for journey ownership
Ortto is better when marketing owns the customer path. That might include acquisition nurture, activation, customer education, retention, winback, and cross-channel campaigns from a unified customer profile.
The value is not just automation. It is giving a marketing team a place to plan and operate journeys.
Sequenzy is the SaaS email answer
Sequenzy sits between these two extremes. It does not try to become PostHog analytics or a broad customer data platform. It focuses on SaaS email workflows that need product events, billing state, transactional messages, and lifecycle campaigns to work together.
Practical rule
Use PostHog Workflows when the workflow is a product action.
Use Ortto when the workflow is part of a broad customer journey program.
Use Sequenzy when the workflow is SaaS lifecycle email and needs a dedicated operating home.