Option #1 – LiveChat – https://livechat.com

Pricing is:

• Starter Plan – $16/month/agent – billed annually
• Team Plan – $33/month/agent – billed annually

Features:

• Each agent logged in to chat can serve multiple visitors at the same time, also there is an option for multiple agents to be logged in and serve chats. 
• As for the queue option, it is described here: https://www.livechat.com/help/queue-configuration/
• Attachments can be sent both ways in every plan except our Starter plan
• Transcripts of the chats are available for you at any time so you can save them, sent them to your email, etc.

Option #2 – Olark – https://olark.com

Pricing is:

• Self-Service Plan – $29/month – billed annually
• Pro Plan – includes copilot chatbot that we can customize for non-live chat situations – need to call to find out price.

Two week free trial – https://www.olark.com/signup/create_new_account/trial

Features:

• Automation
• Live chat analytics
• Chat transcripts
• Custom chatbox forms
• Real-time chat
• Chat team management
• Robust software integration
• Attachments

Option #3 – Kayako – https://kayako.com/pricing/

Kayako is a full service help desk solution developed in 2001. They also have a live chat software..

Pricing is:

• Growth Plan – $30/agent/month
• Scale Plan – $60/agent/month

Growth Plan includes these features:

• Live chat, Facebook, Twitter and email
• Help center
• Basic performance reports
• SingleView™
• Agents log in with Google
• Standard support plan
• Workflow automations: assign tickets to agents
• Advanced reporting
• Multiple brands, multiple languages
• Time-saving macro powered responses
• Custom fields for capturing critical information
• Slack integration
• 700+ Zapier integrations
• Organization Profiles for Agents
• Agent collision prevention