UserGuiding
Onboarding content plus a knowledge base, with quotas per content type and prices printed for up to 2,000 MAUs.
UserGuiding covers tours, hotspots, checklists, resource centers, surveys and NPS, banners, a knowledge base and a product-updates page. Starter caps each type (15 active guides, 1 checklist, 1 survey); Growth raises the caps and adds A/B testing, localization, custom CSS, session replay and a feature-request board. Its FAQ says it doesn't support native mobile apps.
Our UserGuiding review