What call center software integrates with helpdesk tools?

Many call center platforms integrate with helpdesk tools so agents can see tickets, log calls, and update customer records in one place. Common options include:

• Zendesk Talk — built into Zendesk; works natively with Zendesk Support.
• Freshcaller / Freshdesk Contact Center — integrates tightly with Freshdesk and other Freshworks tools.
• Aircall — popular cloud phone system with integrations for Zendesk, Intercom, Salesforce, HubSpot, and others.
• RingCentral Contact Center — integrates with Zendesk, ServiceNow, Salesforce, and more.
• Dialpad — integrates with Zendesk, Salesforce, HubSpot, and Zoho.
• 59 / Five9 — integrates with Zendesk, ServiceNow, Salesforce, and other CRM/helpdesk platforms.
• Talkdesk — integrates with Zendesk, Salesforce, ServiceNow, and others.
• Nextiva — supports integrations with Zendesk, HubSpot, Zoho, and Salesforce.
• CloudTalk — integrates with Zendesk, Freshdesk, HubSpot, Pipedrive, and others.
• JustCall — integrates with Zendesk, Freshdesk, HubSpot, Intercom, and Salesforce.

If you want, I can also narrow this down by:

1. best for small teams,
2. best for enterprise, or
3. best integrations with a specific helpdesk like Zendesk, Freshdesk, or ServiceNow.