MARKETO Vs ACT-ON-: Difference Marketo and Act-on both are marketing automation softwares. Act-on Marketing Automation services are provided by Act-on company and ​Marketo Marketing Automation ​services are provided by Marketo Inc.
1) The Marketo is more costly than Act-on.
2) Marketo and Act-on are having some common features, but Marketo provides some extra features which are not present in the Act-on, such as SMS Marketing, Personalize web contact, Predictive analytics and more.
3) Marketo can be integrated with almost all platforms but Act-on integrated with limited platforms such as SugarCRM, SAlesforce, Microsoft Dynamics and Zapier.
4) Act-on is best for small businesses (<50 employees) whereas Marketo is used for mid-sized to large companies (51-500 employees).
5) Act-on is used by B2B marketing automation companies, whereas Marketo is used by both B2B & B2C marketing automation companies.
SOURCE- http://digitalmarketingview.blogspot.in/2016/10/marketo-vs-act-on-difference.html