If you want a taste of marketing automation without the steep price, give ActiveCampaign a shot.
ActiveCampaign has most of the features that Ontraport has - CRM, marketing automation, sales automation. In addition, it also does site tracking and on-page messaging. None of these features are better than Ontraport's on their own, but together, they work well enough to give Ontraport a run for its money. Importantly, ActiveCampaign has a visual automation builder (which Ontraport lacks).
Pricing wise, ActiveCampaign is significantly cheaper to try - plans start at just $9/month. However, for any decent number of contacts (10k+) and a good plan, you will end up paying nearly the same, if not more, than Ontraport.
Still, for people who want low initial payment and a visual automation builder, it's a good alternative...Full ActiveCampaign Review