AI voice technology is changing how companies manage customer service, lead generation, and support interactions. For businesses considering Retell AI, gaining clarity on its modular pricing and potential add-ons is important for calculating accurate costs. This guide outlines Retell AI’s pricing and compares it with alternatives like Synthflow, which offers integrated features and no-code setup options that make deployment and cost management straightforward.
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Retell AI’s Pricing Model (Pay-As-You-Go)
Retell AI provides a pay-as-you-go model with a base setup that includes 60 free minutes, 20 concurrent calls, and 10 free Knowledge Bases. Below is a summary of Retell AI’s base pricing structure, with separate fees for advanced features like high-quality voice models, language processing, and telephony, allowing users to adjust costs as needed.
| Feature | Cost | Details |
|---|---|---|
| Conversation Voice Engine | $0.07–$0.08 per minute | Elevenlabs voices: $0.07; OpenAI/Deepgram voices: $0.08 |
| LLM Agent | $0.006–$0.06 per minute | Retell LLM options: GPT 4o mini ($0.006) to Claude 3.5 ($0.06) |
| Telephony | $0.01 per minute | Retell’s Twilio integration ($0.01); own Twilio setup (no charge) |
| Knowledge Base | $0.005 per minute | First 10 Knowledge Bases free; $8/month for each additional KB |
| Phone Numbers | $2.00 per month | Optional; own phone numbers accepted |
This modular structure offers flexibility for businesses of varying needs. For those requiring a complete setup, total costs generally range between $0.13 and $0.31 per minute, with monthly totals varying based on minutes used and features selected.
Example Monthly Cost Calculation for Retell AI:
A business using 1,000 minutes with Elevenlabs voice ($0.07), Claude 3.5 LLM ($0.06), and Retell’s Twilio ($0.01) would incur around $0.14 per minute, or approximately $140 per month.
Retell AI Enterprise Pricing & Plan for High-Volume Users
Retell AI also offers an Enterprise Plan with volume-based discounts, reducing rates to as low as $0.05 per minute for high-volume needs. This plan includes all features, higher concurrency limits, and dedicated support through a private Slack channel.
Example Enterprise Monthly Cost Calculation for Retell AI:
For 10,000 minutes at a discounted $0.05 per minute, the cost is $500 per month. Including high-quality voices and advanced language models could bring the monthly total to $1,000 or more, depending on specific usage and selected features.
Synthflow’s All-Inclusive Pricing Advantage
Synthflow offers a simplified pricing model with set monthly rates that include all essential features. Unlike Retell AI, Synthflow’s plans cover high-quality voices, transcription, and CRM integrations in a single fee, giving businesses predictable costs that ease budgeting as they scale.
| Synthflow Plan | Monthly Cost | Included Minutes | Overage Cost per Minute | Value Comparison |
|---|---|---|---|---|
| Starter | $29 | 50 | $0.13 | Affordable entry option |
| Pro | $375 | 2,000 | $0.13 | No added fees |
| Growth | $750 | 4,000 | $0.08–$0.13 | Scalable at a fixed rate |
| Agency | $1,250 | 6,000 | $0.08–$0.13 | Predictable and complete |
Synthflow’s plans help businesses avoid the need to manage individual feature costs, allowing teams to focus on customer interactions without tracking incremental charges.
Example Cost for Synthflow:
For 4,000 minutes, Synthflow’s Growth Plan at $750 provides a flat rate without hidden add-ons, making budgeting straightforward for teams focused on reliable monthly expenses.
Synthflow’s Advantages in Practical Applications
Clear, Predictable Pricing
Synthflow’s single-rate model simplifies the cost structure, eliminating the need to manage each feature cost separately. This transparency benefits businesses aiming for predictable monthly billing. Retell AI’s flexible model, while useful for some, requires ongoing monitoring to avoid unexpected increases in expenses.
Comprehensive Package for Essential Features
Synthflow bundles key features like transcription, high-quality voices, SMS, and CRM integrations in each plan, saving time and preventing extra charges. While Retell AI’s model allows customization, it requires users to monitor usage closely, which may be less efficient for larger operations.
No-Code Setup for Faster Deployment
Synthflow’s no-code interface allows non-technical users to set up quickly. This approach streamlines deployment and makes it an effective option for teams without dedicated tech support. In comparison, Retell AI’s model may require more technical setup, which could delay deployment for businesses without developer resources.
Built-In Integrations with Popular Platforms
Synthflow includes integrations for popular CRM and automation platforms like HubSpot, Salesforce, and Zapier. Businesses can connect Synthflow directly with existing systems without extra configuration. Retell AI offers integrations as well, but Synthflow’s native setup and broader platform compatibility offer added convenience for most business applications.
Comparing Practical Use Cases
Customer Support and High Call Volumes:
A company handling 10,000 minutes per month could see costs reach $1,000 or more with Retell AI’s Enterprise Plan, even at discounted rates. Synthflow’s Agency Plan at $1,250 for 6,000 minutes offers all essential features at a fixed rate, delivering stability in budget planning.
Sales Campaigns and Lead Qualification:
For a sales team needing 2,000 minutes, Synthflow’s Pro Plan at $375 covers all essentials without incremental charges. Retell AI’s model requires tracking each feature’s per-minute cost, which complicates budgeting. Synthflow’s bundled structure ensures consistent costs without concern for specific feature usage.
Conclusion
Retell AI’s modular pricing works well for businesses with specific, variable needs, while Synthflow’s all-inclusive plans offer stronger value for growing companies. Synthflow combines high-quality voices, transcription, CRM integrations, and no-code deployment into a single rate, helping users avoid ongoing cost management. For businesses ready to explore voice AI, Synthflow’s 14-day free trial gives a chance to experience a comprehensive solution with simpler billing and efficient setup.
