Auto dialer software is a critical tool for call centers, as it helps automate the process of dialing phone numbers, saving time and increasing efficiency. The best Auto Dialer software for call centers can vary depending on the specific needs and preferences of your business.

Here are some popular and highly regarded auto dialer software options to consider:

1. Samparkccs: samparkccs offers a cloud-based contact center platform with a robust auto Dialer feature. It includes predictive dialing, power dialing, and progressive dialing options, making it suitable for various call center operations.

2. VICIdial: VICIdial is an open-source auto dialer and contact center solution known for its flexibility and customization options. It's highly configurable and can be tailored to your specific requirements.

3. Aircall: Aircall is a cloud-based phone system that includes auto dialing capabilities. It's user-friendly and designed for small to medium-sized businesses looking for an easy-to-use auto dialer.

4. CallTools: CallTools is an auto dialer software with predictive dialing, power dialing, and preview dialing modes. It offers features like call recording, reporting, and CRM integration.

5. PhoneBurner: PhoneBurner is a cloud-based auto dialer designed for sales and outreach teams. It offers features like email follow-ups, call recording, and local caller ID.

6. Dialpad: Dialpad offers an AI-powered cloud communication platform with auto dialing features. It's suitable for businesses looking for a modern and integrated communication solution.

7. ConnectLeader: ConnectLeader provides a sales engagement platform with auto dialing capabilities. It's designed to help sales teams improve productivity and efficiency.

8. XenCALL: XenCALL is a cloud-based call center software that includes auto dialing features. It offers predictive, power, and preview dialing modes and integrates with various CRM systems.

9. Dixa: Dixa is a customer service platform that includes auto dialer functionality, making it suitable for contact centers focused on providing excellent customer support.

10. VanillaSoft: VanillaSoft offers a sales engagement platform with auto dialing capabilities. It's designed to help sales teams manage leads and automate dialing tasks.

When choosing auto dialer software for your call center, consider factors such as the type of dialing mode you need (predictive, power, preview, etc.), scalability, integration capabilities, reporting and analytics, compliance features, and pricing. Additionally, take advantage of free trials or demos to assess how well the software aligns with your specific call center requirements and workflow.