You can practise sales conversations with a general-purpose chat assistant, and for some purposes it is enough. The question is not which is better in the abstract, but what you want to improve. Text chat is good for thinking about a conversation. A voice trainer is built for having one. This article sets out the difference as plainly as we can, including where a general assistant is the sensible choice.
We make a voice trainer, so we have an interest. We have therefore limited the comparison to things you can check yourself, and we say nothing about how any specific product performs beyond what its maker publishes. Features of every tool change, so verify the current ones before deciding.
What a text chat assistant does well
A general chat assistant such as ChatGPT is flexible. You can ask it to play a buyer, to suggest objections you had not thought of, to draft an opening line, to rewrite your wording or to explain why a reply might land badly. It costs nothing to try, since many assistants have a free tier, and you can steer it in any direction you like.
For preparation, that flexibility is useful:
- Brainstorming objections for a new product or market.
- Drafting and polishing the words of an opening or a follow-up e-mail.
- Thinking through a plan for a difficult account.
- Asking “what would a sceptical buyer say here?” and reading the answer at your own pace.
If your aim is to prepare what you will say, text chat does that well.
Where text chat stops
The things that make a real call hard are mostly not in the words.
Voice, pace and interruption
On a real call you speak, and the other person responds in real time. They interrupt, pause, sigh or go quiet. Typing a message, reading a reply and typing again removes all of this. You have unlimited time to think, which is the one thing you do not have on a call.
Some general assistants now offer voice modes, and these can make practice more spoken. Whether the conversation follows a scenario you control, how it handles silence and interruption and what you get at the end are different questions, so try it with your own use case.
Consistent scenarios
With a general assistant, the buyer is whatever you asked for in the last message, and it can drift. That is fine for exploration but awkward when you want to repeat the same situation three times to see whether you improved. A trainer with fixed scenarios and difficulty levels lets you run the same conversation again and compare your own attempts.
Feedback and repetition
You can ask a chat assistant for feedback on a transcript you paste in, and the answers are often helpful. What you will build yourself is the routine: remembering to ask, deciding what to look for, keeping your notes and returning to the same moments. A purpose-built trainer gives a consistent report after each call, with a few key moments quoted from the transcript and a suggested goal for the next attempt. In DIRI AI that is the coach report. The feedback is AI feedback; it is a suggestion, not a verdict, and it can be wrong.
A side-by-side summary
| General chat assistant | Voice AI trainer | |
|---|---|---|
| Input | Typed text, and voice in some versions | Spoken call |
| Scenario control | You describe it each time | Chosen from a set, repeatable |
| Interruptions and silence | Depends on the tool and mode | Part of the exercise |
| Feedback | On request, in the format you ask for | After each call, in a consistent report |
| Best for | Preparing words, brainstorming | Rehearsing delivery and repeating |
| Cost | Often a free tier; check current plans | Check current plans |
This is a generalisation. Individual tools vary and change.
When ChatGPT is enough
Use a general chat assistant when:
- you are preparing wording or a list of likely objections;
- you want to think through a situation rather than rehearse it;
- you are comfortable on the phone and need ideas, not repetition;
- you only practise occasionally, and the routine does not matter.
When a voice trainer is worth using
A voice trainer fits better when:
- the difficulty is saying it, not knowing what to say;
- you want to repeat the same scenario and compare attempts;
- a team needs a shared set of scenarios and a consistent format;
- you want practice with no risk to real contacts.
Many people use both: a chat assistant to prepare, a voice trainer to rehearse. For how practice with AI compares with practising with a colleague, see AI role-play vs practising with a colleague, and for a wider view of options, see alternatives.
A note on company data
Whichever tool you use, think about what you paste into it. Customer names, contract details and internal pricing do not belong in a tool unless your company has approved it for that. Check the provider's data and retention settings and your own company's policy. This applies to us as much as to any other provider; our privacy documents describe what DIRI AI does with practice data.
How to start with voice
- Pick one situation you find hard, such as a price objection.
- Run one short practice call and speak aloud, even if it feels awkward.
- Read the report and choose one thing to change.
- Run the same scenario again.
You can listen to what a practice call is like on the sample call page, and read about practising a sales call in 10 minutes. For how reports are produced, see How we score.
Related: AI sales practice vs classroom sales training, AI Sales Coach vs Human Coach: What Each Does Best, DIRI AI vs Yoodli: Sales Call Practice Compared (2026).
Frequently asked questions
Can I use ChatGPT for free to practise sales calls?
Many assistants have a free tier, though the limits and features change, so check the current offer. For preparing wording and brainstorming objections, a free tier is often enough.
Can AI hear my tone of voice?
That depends on the tool, and you should not assume it. DIRI AI does not recognise emotions or analyse your voice: the report works from the transcript and call events, so it can quote what was said but not how it sounded. If tone matters to you, listen to yourself and ask a colleague as well.
How is a practice call assessed?
In DIRI AI, you receive a coach report with a summary, key moments quoted from the transcript and a suggested practice goal. It is AI feedback, meant as a starting point for your own judgement, and it is not an exam or a score used to evaluate you.
Is it safe for company data?
Keep confidential information out of any tool your company has not approved. Check each provider's data handling and your own policy, and read our privacy documents if you are considering DIRI AI for a team.
How much does practice cost?
DIRI AI has a Free plan with 3 voice calls a month of up to 5 minutes each, and paid plans for more. See the pricing page for current terms. For a general assistant, check the provider's current pricing.
A note on sources
This comparison is editorial. It relies on publicly known characteristics of general chat assistants and on how DIRI AI works, and it does not rank products or measure results. Tool features change; verify them yourself.
DIRI AI trains communication and provides a report after each practice call; the participant sees their own report. The intended purpose is training, not evaluating employees.
The Free plan includes 3 voice calls a month of up to 5 minutes each; e-mail confirmation is required. Check current terms before you start.