Yes, both Zoho Campaigns and Yammer offer a Free Trial.
Zoho Campaigns is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Yammer is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Zoho Campaigns begins at $3/Month when Billed Yearly, while pricing details for Yammer are unavailable.
Some top alternatives to Zoho Campaigns includes Campaigner, Moosend, SMTP, ActiveCampaign, Omnisend, Constant Contact, MailChimp, Campaign Monitor, GetResponse, MailerLite, Emma, FreshMail, SendFox and Zoho Marketing Automation.
Some top alternatives to Yammer includes Interact, Interact Software, MyHub Intranet Software, Creative Social Intranet, Attollo Intranet, Oak Engage, Engynn Intranet and OneWindow Workplace.