Yes, both Customer.io and Close offer a Free Trial.
Customer.io is designed for Large Enterprises, Medium Business and Small Business.
Close is designed for Individuals, Freelancers, Medium Business and Small Business.
Pricing for Customer.io Starts at $100/Month whereas for Close Starts at $19/user/month when monthly.
Some top alternatives to Customer.io includes Outgrow, ActiveCampaign, CleverTap, Moosend, Omnisend, ActiveTrail, Iterable, Hubspot Marketing Hub, Klaviyo, SendGrid, MailChimp, StreamSend, Adobe Marketo Engage and Contactspot.
Some top alternatives to Close includes Thryv, Salesforce Sales Cloud, monday sales CRM by monday.com, Pipedrive, Zoho CRM, Vendasta, ClickUp, Freshsales, GoCRM, SimpleCRM, FIVE CRM, webCRM, Cratio CRM, DigitalCRM.com, Alore CRM, Truly, Pipeline CRM and CRM.io by 500apps.