Yes, both Docsify and Vocus.io offer a Free Trial.
Docsify is designed for and undefined.
Vocus.io is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Docsify Starts at $4/Month when Billed Yearly whereas for Vocus.io Starts at $5/Month.
Some top alternatives to Docsify includes Meet Hugo, Sales Booster by Leadspicker, Whois Database, Qualified, Prospectss, Workvivo, Zoho SalesInbox, Daily Metrics, Vocus.io, MailTrack and Email Meter.
Some top alternatives to Vocus.io includes Bulky, OutreachPlus, SocialMailer, Use Outreach, Qualified, SmartReach.io, Workvivo, SellScale, InboxPro, Sigmail, Go Follow-Up and IFTTT.