How we make this list: we compare pricing pages, product documentation and public user reviews. Ratings come from G2, Capterra or Trustpilot, with the date we checked them.
Key takeaways
- Retell AI starts at $0.07 to $0.31 per minute, but users report real bills of $0.25 or more per minute once the LLM, telephony and knowledge-base queries are factored in.
- Listed per-minute prices mislead on their own: a $0.05 platform with a premium voice and a large LLM can cost more than a $0.14 bundle, so price the same call on every finalist.
- Vapi at $0.05 per minute for orchestration suits developers composing their own stack, while Bland AI at $0.12 to $0.14 per minute suits high-volume teams wanting an all-in bundle.
- Synthflow suits no-code teams from $29 per month, while PolyAI and enterprise options suit contact centres that need vendor-built agents.
Quick comparison
| Tool | Best for | Starting price | Free plan |
|---|
 Vapi | Engineers needing maximum API flexibility | $0.05 per minute (orchestration, plus provider costs) | No |
 Bland AI | High-volume outbound teams | $0.14 per minute | No |
 Synthflow | No-code teams and agencies | $29 per month | No |
 ElevenLabs Agents | Teams prioritising voice realism | $5 per month | Yes |
 CloudTalk | SMB sales and support teams | $19 per user/month | No |
 Voiceflow | Visual agent builders and prototypers | $60 per editor/month | No |
 Twilio | Enterprise developer teams | $0.013 per minute | No |
 PolyAI | Large enterprise contact centres | See website | No |
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The best Retell AI alternatives
#1Vapi
Best for: Engineers needing maximum API flexibility4.2/5 on
G2 (3 reviews, checked Oct 2026)
Visit vapi.ai
Starting price$0.05 per minute (orchestration, plus provider costs)
Free planNo
Vapi is the developer orchestration platform, charging $0.05 per minute for orchestration plus speech-to-text, LLM and text-to-speech at cost, or $0 if you bring your own provider keys. It is the cleanest custom-LLM option: set the provider to custom-LLM and paste any OpenAI-compatible base URL, so any model you host works unchanged.
Voice quality and latency depend entirely on the providers you choose, and an API build needs developers. Vapi fits engineering teams composing their own voice stack who want maximum flexibility and are willing to own integration work.
What we like- Maximum provider flexibility
- Bring your own LLM, voice and telephony
- Clean custom-LLM support
- $29 per month plan in one guide
Watch out for- Needs developers
- Voice quality and latency depend on your providers
- Total cost varies with model choice
#2Bland AI
Best for: High-volume outbound teams5.0/5 on
G2 (11 reviews, checked Oct 2026)
Visit bland.ai
Starting price$0.14 per minute
Free planNo
Bland AI is the strong choice for high-volume outbound teams wanting all-in per-minute pricing, with a closed in-house stack at $0.14 per minute on the free tier, $0.12 on the $299 per month Build plan, and $0.11 on the $499 per month Scale plan, with telephony billed separately. Voice cloning and professional, highly customisable voices suit outbound campaigns, and low-code setup runs from 10 minutes to 2 to 4 weeks.
Bland does not support a custom LLM at all: its API accepts only its proprietary base and turbo models, which suits regulated teams wanting a single vendor and data that never leaves. Bland fits high-volume outbound teams and regulated teams that prefer a bundled stack over component choice.
What we like- All-in per-minute pricing with models included
- Voice cloning
- Low-code setup from 10 minutes
- Strong for high-volume outbound
Watch out for- No custom LLM, only proprietary base and turbo models
- Build plan costs $299 per month plus $0.12 per minute
- Telephony billed separately
#3Synthflow
Best for: No-code teams and agencies4.5/5 on
G2 (1,016 reviews, checked Oct 2026)
Visit synthflow.ai
Starting price$29 per month
Free planNo
Synthflow is the no-code voice AI platform for operations-led teams, with a visual builder, highly natural human-like voice quality under 500ms latency, and self-serve setup under 1 hour. One guide lists it from $29 per month, while enterprise pricing starts at $30,000 per year with 4 to 8 week implementation.
All-in cost breaks down near $0.09 per minute for the voice engine, $0.02 to $0.05 for the LLM and $0.02 for managed telephony, landing near $0.13 to $0.16 per minute with everything included. Synthflow fits SMBs and agencies that want no-code deployment without engineering, though strict compliance buyers should check certifications.
What we like- No-code visual builder
- Highly natural voice quality under 500ms latency
- Self-serve setup under 1 hour
- Pay-as-you-go voice engine
Watch out for- Enterprise pricing from $30,000 per year
- White-label costs $2,000 per month
- No formal SOC 2 or HIPAA certifications in one guide
Starting price$5 per month
Free planYes
ElevenLabs Agents leads on voice realism, with over 10,000 voices, voice cloning, an expressive mode, and latency near 75 to 100ms on some models, though other models tested took more than a second to first audio. Plans start at $5 per month in one guide, with additional agent minutes at $0.08 per minute before LLM usage, and a free tier for starting.
You connect your own telephony, and the LLM is billed separately. ElevenLabs fits teams where voice quality and multilingual coverage matter most, and that can manage telephony and LLM billing alongside the agent platform.
What we like- 10,000-plus voices with cloning and expressive mode
- Latency near 75 to 100ms on some models
- No-code builder or APIs
Watch out for- $0.08 per minute beyond plan minutes plus LLM billed separately
- You connect your own telephony
- Model latency varies
#5CloudTalk
Best for: SMB sales and support teams4.4/5 on
G2 (1,938 reviews, checked Oct 2026)
Visit cloudtalk.io
Starting price$19 per user/month
Free planNo
CloudTalk is the top choice for SMB sales and support teams in one Retell alternatives comparison, thanks to operational reliability and integrated power. It offers built-in telephony across 160-plus countries, natural-sounding voices in 70-plus languages with auto-detection, and latency under 800ms.
Pricing is cited at $19 per user per month in the alternatives list and $99 per month for 200 minutes in the voice agents table, so confirm which plan covers AI voice features. CloudTalk fits SMB sales and support teams that want voice agents inside a reliable calling platform rather than a standalone agent tool.
What we like- Built-in telephony in 160-plus countries
- Natural voices in 70-plus languages
- Operational reliability
- Integrated power
Watch out for- Voice agent plan cited at $99 per month for 200 minutes in another guide
- Latency under 800ms trails faster rivals
#6Voiceflow
Best for: Visual agent builders and prototypers4.5/5 on
G2 (115 reviews, checked Oct 2026)
Visit voiceflow.com
Starting price$60 per editor/month
Free planNo
Voiceflow suits visual agent builders and prototypers, with a design-first workflow for mapping conversations, collaborating as a team, and testing agents before production deployment. Editor pricing at $60 per editor per month suits small builder teams.
Production telephony depth trails developer platforms like Vapi and Retell, and the prototyping focus means production teams may need a second platform for scale. Voiceflow fits teams designing and prototyping voice agents visually before committing to a production platform.
What we like- Visual agent building for prototypers
- Team collaboration
- Design-first workflow
Watch out for- Editor-based pricing scales with team size
- Less production telephony depth than Vapi or Retell
- Prototyping focus
#7Twilio
Best for: Enterprise developer teams4.1/5 on
G2 (529 reviews, checked Oct 2026)
Visit twilio.com
Starting price$0.013 per minute
Free planNo
Twilio is the enterprise developer foundation, offering telephony infrastructure from $0.013 per minute plus the cost of speech, LLM and voice components you assemble yourself. Its ecosystem and scale suit enterprises building custom voice experiences on proven infrastructure.
There is no packaged voice agent: teams build the agent loop, telephony and integrations themselves, which needs significant engineering. Twilio fits enterprise developer teams that want infrastructure control and already run on Twilio for messaging and voice.
What we like- Enterprise-grade telephony infrastructure
- Massive ecosystem
- Pay-as-you-go from $0.013 per minute
- Proven at scale
Watch out for- Building agents needs significant engineering
- Voice AI is assembled from components, not a packaged agent
- Support costs extra
#8
PolyAI
Best for: Large enterprise contact centres
Visit poly.ai
Starting priceSee website
Free planNo
PolyAI builds and maintains exceptionally lifelike voice agents for large enterprise contact centres, with latency under 300ms and integration with existing contact centre infrastructure. Its vendor-built model removes engineering burden from the buyer, which suits enterprises that want a managed agent rather than a platform to build on.
Pricing is contact sales only, and the enterprise sales cycle suits large contact centres, not small teams. PolyAI fits enterprises with high call volumes that want the most lifelike voices and a fully managed agent deployment.
What we like- Exceptionally lifelike voices
- Latency under 300ms
- Vendor-built and maintained agents
- Existing contact centre integration
Watch out for- Contact sales only
- Enterprise setup cycle
- Overkill for small teams
How we chose
We compared platforms on voice quality, latency, setup time, phone service, price and the limits reviewers cite most often. Sources included a nine-tool voice agent comparison with October 2026 pricing, a platform comparison with listed per-minute prices, a Bland alternatives guide and a Retell alternatives list. Where prices conflicted across guides, the article uses the most recent figure and notes the range. We did not claim hands-on testing, and listed prices are a poor guide on their own without modelling the same call on every finalist.
What to check before you sign
Start by pricing the same call on every finalist: same LLM, same voice quality, same telephony. A $0.05 orchestration platform with a premium voice and a large LLM can cost more than a $0.14 bundle, and Retell users report real bills of $0.25 or more per minute once LLM, telephony and knowledge-base queries are included. Model total cost at your real minute volume, not the headline rate.
Next, match the platform to your team's skills. Developer platforms like Vapi and Twilio need engineers, no-code platforms like Synthflow suit operations teams, and managed platforms like PolyAI and Sierra suit enterprises that want vendor-built agents. A platform your team cannot operate will stall no matter how good its latency looks.
Finally, pilot on real calls with real customers, not demo scripts. Test interruptions, background noise, off-script conversations and handoffs to humans, since AI that needs developer attention whenever a conversation goes off-script costs more in maintenance than it saves in agent time. Measure resolution, latency and customer satisfaction on live traffic before committing.
Frequently asked questions
What is the best Retell AI alternative?
For developers, Vapi at $0.05 per minute orchestration. For high-volume outbound, Bland AI at $0.12 to $0.14 per minute bundled. For no-code teams, Synthflow from $29 per month. For voice realism, ElevenLabs Agents. For SMB calling, CloudTalk. For enterprises, PolyAI.
How much does an AI voice agent cost per minute?
As of late 2026, Vapi charges $0.05 per minute for orchestration plus providers at cost, Retell AI runs $0.07 to $0.31 per minute all-in, Bland AI runs $0.11 to $0.14 bundled, Synthflow lands near $0.13 to $0.16 all-in, and ElevenLabs Agents adds $0.08 per minute beyond plan minutes plus LLM costs.
Why is my Retell AI bill higher than the headline rate?
Because the headline rate excludes or understates LLM, telephony and knowledge-base costs. Users report real bills of $0.25 or more per minute once those layers are included, plus a billing system with many moving parts that makes forecasting hard.
Do I need developers to run a voice AI agent?
For Vapi, Twilio and Retell, yes, since they are developer platforms. For Synthflow and Voiceflow, no-code builders suit operations teams. For PolyAI and Sierra, the vendor builds and maintains the agent for you.
Which voice AI platform has the lowest latency?
PolyAI reports under 300ms, Bland AI near 400ms, Synthflow under 500ms, Retell AI near 600ms, and ElevenLabs near 75 to 100ms on some models but over a second on others. Latency depends on model, voice provider and telephony, so test on your own calls.
Can I use my own LLM with a voice AI platform?
With Vapi, Retell AI and ElevenLabs Agents, yes, through custom-LLM support. With Bland AI, no, since it accepts only its proprietary models. With Synthflow, you choose from hosted models rather than pointing at an arbitrary endpoint.
Sources we checked (5)
- https://www.cloudtalk.io/ai-voice-agents/
- https://www.cartesia.ai/learn/ai-voice-agent-platforms
- https://trillet.ai/blogs/top-5-best-alternatives-to-bland-ai-in-2025
- https://www.cloudtalk.io/blog/retell-ai-alternative/
- https://www.morphllm.com/best-ai-voice-agent-platforms
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Shihab Mia · Founder, Rankite
Shihab has 5+ years in B2B and SaaS SEO. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.