Best AI voice agents for sales
Vapi, Retell AI and Bland AI compared specifically for a sales use case: cost per call, what each one says about cold outbound, and what happens once the call ends.
Retell AI wins for a sales team building qualification or follow-up calls, thanks to itemized, predictable per-minute pricing. Bland AI is worth a closer look for anything framed as cold outreach specifically, because it is the one platform here that has publicly stated where it thinks the line is under consent law.
The short answer
- Vapi's $0.05/min platform fee is orchestration only; a real sales call with a model, voice and telephony typically runs $0.07-$0.25/min, per vapi.ai/pricing.
- Retell AI's itemized pricing ($0.055/min voice, $0.015-0.040/min TTS, model cost on top) lands at $0.07-$0.31/min, with $10 in free credit to test a sales call flow before paying, per retellai.com/pricing.
- Bland AI has published its own position that its AI voice, classified as 'artificial' under TCPA, is not suited to cold outbound campaigns without prior express written consent, framing its product for following up with engaged leads instead, per a Bland AI blog post.
AI voice agents for sales compared
| Platform | Real cost per minute | Cold-call stance | Free tier | Best for | Not for |
|---|---|---|---|---|---|
| Vapi | $0.07-$0.25/min all-in | Not addressed on its pricing page | 60+ minutes on Build | A technical team building a fully custom sales call flow | A team wanting a stated position on cold-call compliance |
| Retell AI | $0.07-$0.31/min all-in | Not addressed on its pricing page | $10 credit, 20 free concurrent calls | A sales team wanting predictable per-minute cost to budget against | A team wanting a bundled CRM or pipeline |
| Bland AI | $0.11-$0.14/min (Build/Scale talk rate) | Publicly states it should not be used for cold outbound | Start plan: 2 credits, 100 calls/day cap | Follow-up or warm-lead calling, not cold outreach | A team specifically planning cold sales calls |
Figures checked on vapi.ai/pricing, retellai.com/pricing and bland.ai/pricing, September 2026. Bland's cold-calling position is stated on its own blog, not in its terms of service, and reflects Bland's interpretation, not legal advice.
How each one fits a sales motion
Vapi
The most flexible option for a sales team with engineering resources: you choose the model and voice provider, which lets you tune the agent's tone and cost tradeoffs precisely. That flexibility means someone owns the ongoing maintenance of the call flow as your sales process changes. Not for: a sales team without a developer to build and iterate on the flow.
Retell AI
Itemized pricing makes it easier to forecast cost against expected call volume before a sales leader commits budget, and the free credit is enough to run a real pilot with actual leads before paying. Not for: a team that wants Retell to also handle where the lead goes after the call; that stays your responsibility to wire up.
Bland AI
The one platform in this comparison that has taken a public position on cold outbound specifically, stating its product is better suited to calling leads who already engaged rather than cold prospecting under TCPA's consent requirements. That makes it a more conservative choice for a sales team wary of compliance risk, at the cost of ruling out true cold-call use cases. Not for: a sales program built around genuinely cold outbound calling.
When none of these is the answer
For high-value, complex sales conversations, an AI voice agent is the wrong tool regardless of price; a skilled human rep reads context and objections in ways none of these platforms claim to replicate. These tools fit narrower, higher-volume jobs: qualification, appointment confirmation, and structured follow-up, not the conversation that closes a large deal.
SalesCrew is not included in the ranking above because it does not build voice agents; it runs outbound calls through Vapi as one channel and logs the result against the contact. A dedicated AI voice agent product is not part of SalesCrew today.
Questions
- Can I use an AI voice agent for cold sales calls?
- Check the platform's own position before assuming yes. Bland AI has published a blog post stating its AI voice is classified as 'artificial' under TCPA, which generally requires prior express written consent, a condition cold calling doesn't meet, and positions its product as better suited to following up with leads who already engaged. This is Bland's own stated position, not a claim about every platform.
- Do these platforms integrate with a CRM automatically?
- Not natively in most cases. You'd typically connect the voice platform to your CRM through a webhook or API call yourself, since none of the three here ship a built-in pipeline; they handle the call and hand off the outcome.
- What's the real cost of running an AI voice agent for outbound sales at volume?
- Beyond the per-minute rate, budget for the setup time to build and test a call flow, ongoing monitoring of call quality, and the fact that pricing is usage-based, so cost scales directly with call volume rather than a flat monthly fee.
- Is a human sales rep still better than an AI voice agent?
- For complex, high-value conversations, most sales teams still use a human. AI voice agents fit better for high-volume, lower-complexity calls, like initial qualification or appointment confirmation, where consistency and cost per call matter more than a rep's judgment in the moment.