Yes, both Tonkean and K2 offer a Free Trial.
Tonkean is designed for Large Enterprises and Medium Business.
K2 is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Tonkean Starts at $10,000/Month whereas for K2 Starts at $2,000/Month.
Some top alternatives to Tonkean includes Process Street, Kintone, ProcessMaker, K2, Bautomate, Withprocess.com, ShakeSpeare Software, Tibco BPM Enterprise, BPMapp by 500apps and Checkeden.
Some top alternatives to K2 includes Nintex, ProcessMaker, BP Logix BPMS, Nintex Promapp, IBM Business Automation Workflow, ProcessPlan, Bautomate, Bizagi, Tibco BPM Enterprise and BPMapp by 500apps.