Choose monitoring software (Profound, Otterly, AthenaHQ) if you have an internal SEO/content team that can execute the optimization work. You get a dashboard at $29–$2,000/month and your team does the schema deployment, Wikidata submissions, comparison pages, and content production.
Choose a managed service (Citely) if you want the optimization work done for you. The dashboard is included. Pricing reflects a managed-service tier ($1,497–$2,497/month for ongoing, $1,997–$2,500 for setup) — comparable to a mid-tier GEO agency retainer, but with one accountable partner who built the underlying software instead of renting it from a third party.
The two are also frequently used together — enterprise teams run a monitoring product for analytics depth and engage a service partner for execution.