Trellus Blog | Cold Calling, Dialing and Sales Coaching

What Is a Parallel Dialer? A Beginner's Guide to Smarter Calling

Learn how parallel dialing places multiple calls at once, who it may suit, and what to check before switching from one-at-a-time dialing.

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What Is a Parallel Dialer? A Beginner's Guide to Smarter Calling

Cold Calling Dialer

The 9 best cold calling dialers for sales teams in 2026

Compare 9 cold calling dialers by workflow, dialing mode, CRM fit, and pricing approach—plus a practical test to choose the right one in 2026.

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Auto Dialer Software

Best Auto Dialer Software (2026): 7 Options Compared

Compare the best auto dialer software for sales teams in 2026: which tools power dial, which parallel dial, where reps call from, and what to verify before you buy.

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Ideas for your next call block

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Bitrix24

How to Make Calls From Bitrix24

What Bitrix24's own telephony and automatic dialer do, the steps for each way to call a customer or a list, the plans involved, and what each route writes back to Bitrix24.

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Smartlead

How to Make Calls From Smartlead

What Smartlead's SmartDialer does, the steps for each way to call a lead or a call queue, what it costs, and what each route writes back to the lead.

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Twenty CRM

How to Make Calls From Twenty CRM

What Twenty does and does not do for phone calls, the steps for each way to call from a record or a list, and what each route writes back to Twenty.

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Attio

Best Dialers for Attio in 2026

Eight ways to call from Attio, grouped by click-to-call, power and parallel dialing: how each connects, what it writes back and its published price.

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Cold calling

Why Your Calls Show ‘Spam Likely’ and How to Fix It

Who sets a spam label, what the carriers and analytics providers say causes one, how to check a number and a checklist for registering, reporting and calling patterns.

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Clay

How to Call a List in Clay

What Clay does and does not do with phone numbers, the steps for calling a table by hand, exporting or pushing it to a CRM or dialer, or dialing the rows directly, and what each route writes back to the table.

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Google Sheets

How to Call a List in Google Sheets

What Google Sheets does and does not do with phone numbers, the steps for calling a list by hand, exporting it to a CRM or dialer, or dialing the rows directly, and what each route writes back to the sheet.

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Attio

How to Make Calls From Attio

What Attio does and does not do for phone calls, the steps for each way to call from a record or a list, and what each route writes back to Attio.

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How to Make Calls From Close CRM

What Close's built-in calling does on each plan, the steps for the Power Dialer and Predictive Dialer, the phone apps in Close's directory, and what each route logs on the Lead.

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GoHighLevel

How to Make Calls From GoHighLevel

What HighLevel's own phone system and dialers do, the steps for each way to call a contact or a list, the plans and usage charges involved, and what each route writes back to HighLevel.

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Pipedrive

How to Make Calls From Pipedrive

What Pipedrive does and does not do for phone calls, the steps for each way to call from a contact, deal or People list, and what each route writes back to Pipedrive.

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Zoho CRM

How to Make Calls From Zoho CRM

What Zoho CRM does for phone calls, the steps for each way to call from a record, a Task or a list, and what each route writes back to Zoho CRM.

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