Yes, both SyncSpider and Twilio Flex offer a Free Trial.
SyncSpider is designed for Large Enterprises, Medium Business and Small Business.
Twilio Flex is designed for Large Enterprises and Medium Business.
Pricing for SyncSpider Starts at $29/Month whereas for Twilio Flex Starts at $1/User.
Some top alternatives to SyncSpider includes Zapier, PieSync, MuleSoft Anypoint Connectors, KloudConnectors, Integrately, SyncApps, SaaS Integrator, automation.re, Activepieces and ApiX-Drive.
Some top alternatives to Twilio Flex includes CometChat, CloudTalk, Five9, 3CX, Genesys PureConnect, MSG91, Infobip, Cloudonix, CommPeak, CloudContactAI and Messenger Communication Platform.