8 best PolyAI alternatives in 2026, compared
Samuel Oram-Jones, 12 min read
The best PolyAI alternatives in 2026 are Bland, Synthflow, Replicant, Cognigy, Kore.ai, Sierra, Voiceflow, and Retell, and Bland ranks first for enterprise calls because it is full stack. This ranking compares each voice AI provider on who builds the AI, how a bill is counted, and where calls can run, as of November 2026.
What are the best PolyAI alternatives?
The best PolyAI alternative for enterprise calls is Bland, because one company builds and runs every AI model on a call and publishes a rate for it, while PolyAI sells a managed agent on a quote.
- Bland: Best overall for enterprise calls
- Synthflow: Best for sales-led, multi-channel voice teams
- Replicant: Best for contact centers wanting quoted AI agents
- Cognigy: Best for enterprises that configure their own platform
- Kore.ai: Best for enterprises building chat and voice agents
- Sierra: Best for enterprise teams buying outcome-priced agents
- Voiceflow: Best for CX teams building agents on a visual builder
- Retell: Best for developer teams that pick their own model and voice
Why do teams look for PolyAI alternatives?
Teams look for PolyAI alternatives when they want a price and a contract they can read before a sales call, because PolyAI sells its voice agent on a quote. PolyAI says ongoing use "is priced on a per-minute basis" and then offers a form to talk to its team, with no rate printed.
Its separate Dialog-RSN-1 model API is a different purchase at 2¢ per connected minute, and PolyAI's model API does not include telephony and orchestration.
The contract is the second reason. PolyAI promises billing "on connected time, with no minimums and no rounding up to the minute", while its managed-service agreement says "the total handle time is rounded up to the next 30-second increment". The same agreement deems a build ready for testing on day 90 and gives a customer 14 days to test it regardless of whether the build is ready.
Buyers should check a few more things before switching. A BAA is the contract HIPAA requires before a vendor handles patient information, and card payments need a clear PCI DSS statement.
Each outside language model, speech, or transcription provider is also one more company in a security review, and PolyAI uses OpenAI and Amazon Bedrock language models next to its own Raven model family.
Messaging belongs on the same list. PolyAI offers voice and web chat, with SMS "only available for voice", and a buyer who wants branded iMessage beside voice should note that Bland runs iMessage agents natively on Enterprise, while the providers without iMessage agents as of November 2026 are named in the FAQ below.
How do the 8 best PolyAI alternatives compare?
These eight providers differ most in how much of a call they build themselves and in whether a buyer can read a price, and Bland is the one that builds all of it and publishes a rate. Teams that want more detail on any one of them can start with Bland vs PolyAI, this PolyAI review, and PolyAI alternative for enterprises.
1. Bland: Best overall for enterprise calls
What does it do? Bland is a full stack voice AI provider that builds and runs its language, speech, and transcription models for inbound and outbound calls, and it also runs SMS and web chat on Enterprise. Teams build calls in Pathways as connected steps they can test before launch. On Enterprise, forward-deployed engineers build a first agent beside a customer's team, which then edits it.
Who runs on it? Bland publishes sub-200ms latency and a 99.9% uptime SLA on every plan, and serves more than 250 enterprise customers.
Who is it for? Enterprises and contact centers in any industry that run high-stakes calls at volume, including teams that want a managed start from engineers but a platform they control afterwards.
Pros
- No outside AI lab in the call path, so a security team reviews one AI company
- Dedicated orchestration and dedicated GPUs run by Bland, on Enterprise
- BAA on Enterprise, PCI DSS self-attested, FedRAMP 20x Class A
- Bland Speech v3 ranked first of 13 AI voices on Audio Realism Bench on 4 August 2026
- Forward-deployed engineers on Enterprise
- Native iMessage agents on Enterprise, sharing pathways with voice
- Staged releases that pause a new agent version when it performs worse than the last
- Call grading on the audio as well as the transcript
Cons
- Overkill for a small prototype, because Bland is built for production calls at volume
Pricing: Self-serve Start is $0.14 per minute with no platform fee, self-serve Build is $0.12 per minute with a $299 monthly platform fee, and Enterprise is priced to volume. Phone is billed separately at carrier cost. Enterprise adds native iMessage agents, warm transfers, a BAA, SSO, data residency, dedicated GPUs run by Bland, and forward-deployed engineers, alongside SMS and web chat.
Idaho Housing and Finance Association saves $750,000 a year by replacing its IVR with Bland, which handles 4,000 inbound calls a day and cut average call time by 20%.
"We save thousands of dollars a day."
Greg Blake, Chief Information Officer, Idaho Housing and Finance Association
2. Synthflow: Best for sales-led, multi-channel voice teams
What does it do? Synthflow sells AI voice agents through one annual enterprise agreement, scoped to call volume, phone system, integrations, security needs, and launch support. Synthflow says it "has no free plan or trial and no rate by the minute", and its chat agents run through "an embeddable widget, the chat API, WhatsApp messaging, or SMS".
Who is it for? Mid-market and enterprise teams that want a sales-scoped voice platform with WhatsApp and SMS options.
Pros
- SOC 2 Type 2, ISO/IEC 27001, HIPAA, and GDPR coverage
- Forward-deployed engineers launch agents where the agreement includes launch support
Cons
- Annual enterprise agreement only, with no free plan or trial
- No public per-minute rate
- Synthflow says it is "Powered by proprietary orchestration and models from OpenAI, ElevenLabs, Deepgram, and custom in-house logic."
- WhatsApp and SMS chat agents are limited to US workspaces
- No iMessage agents
Pricing: Annual agreement only, with purchased phone numbers at $1.50 a month.
3. Replicant: Best for contact centers wanting quoted AI agents
What does it do? Replicant sells AI agents for customer service across voice, chat, and SMS. Replicant prices by quote.
Who is it for? Large contact centers that want a vendor-run deployment with contracted business outcomes.
Pros
- SOC 2 Type 2, PCI DSS, and HIPAA certifications
- Voice, chat, and SMS on one platform
Cons
- No published rate, only a pricing request form
- Who builds its language, speech, and transcription models is undisclosed
- No iMessage agents
Pricing: Quote only, through a pricing request.
4. Cognigy: Best for enterprises that configure their own platform
What does it do? Cognigy sells a conversational AI platform that connects to language, speech, and transcription providers a customer chooses, and it publishes no rate. Cognigy says it supports "LLM integration with top providers such as OpenAI, Azure, Anthropic, Amazon Bedrock, Google, and Mistral AI", and its Voice Gateway connects an agent to the phone network over SIP, the standard internet-calling connection.
Who is it for? Large contact centers with a platform team that want to wire together their own model and speech vendors.
Pros
- Voice Gateway connects over SIP, with Twilio endpoints for SMS and WhatsApp
- SOC 2 Type II, ISO 27001, and PCI DSS
Cons
- A customer brings API credentials for each language model it connects
- Pricing runs through a demo request
- No iMessage agents
Pricing: Quote only, after a demo request.
5. Kore.ai: Best for enterprises building chat and voice agents
What does it do? Kore.ai sells an enterprise agent platform for service, work, and process automation across digital and voice channels. Its voice side lets a team "Set Speech-to-Text and Text-to-Speech providers (Google, Microsoft Azure, AWS Polly, ElevenLabs, Deepgram, OpenAI, PlayHT) per language".
Who is it for? Large enterprises that want one platform for chat, messaging, and voice agents.
Pros
- Native Voice Gateway beside enterprise messaging, social, email, and SMS
- New users get $500 in free credits
Cons
- Bills $0.20 per session on its standard plan, and Enterprise bills a session as 15 minutes of interaction
- Speech providers are chosen from outside companies
- No iMessage agents
Pricing: $0.20 per session on its standard plan, with Enterprise customized through its support team.
6. Sierra: Best for enterprise teams buying outcome-priced agents
What does it do? Sierra sells a managed AI agent platform for customer service across chat, voice, email, SMS, and WhatsApp, and it publishes no rate. It says its agents combine "frontier, open-weight, and proprietary models", and that it "automatically switches between LLM providers". It began as a chat-first platform for customer support and added voice later.
Who is it for? Enterprise customer experience teams that want a managed agent and are happy to negotiate pricing.
Pros
- Holds PCI DSS Level 1 Service Provider certification
- Chat runs across a website, mobile app, WhatsApp, Apple Business Chat, and SMS
Cons
- No published rate, with pricing negotiated by outcome
- Sierra says "routing or greeter-style interactions may align better with consumption-based pricing", so the unit a bill counts depends on the use case
- Language models are blended and switched between providers
- No self-serve mode as of November 2026
Pricing: No published rate, priced by outcome or by conversation depending on the use case.
7. Voiceflow: Best for CX teams building agents on a visual builder
What does it do? Voiceflow is a platform for building, testing, and deploying chat and phone agents with playbooks and workflows. It tells buyers to "Avoid model lock-in. Choose from the biggest LLM providers, or bring your own model."
Who is it for? Customer experience teams and agencies that design agents in a visual studio and pick their own models.
Pros
- Free trial with no credit card
- SOC 2 Type II, ISO 27001, GDPR, and HIPAA, and says it does not use customer data to train models
Cons
- Every interaction consumes credits "depending on the vendor and model you use", so a minute has no single price
- Enterprise pricing runs through a request
- Language models come from outside providers a team chooses
- No iMessage agents
Pricing: Usage-based credits with optional auto top-ups, and Enterprise on request.
8. Retell: Best for developer teams that pick their own model and voice
What does it do? Retell is a platform for building and monitoring AI voice and chat agents, billed per minute with the language model and voice priced as separate lines. A customer's own SIP trunk (a connection to the phone network) carries no Retell phone charge, and phone on Twilio or Telnyx is billed on top.
Who is it for? Developer-led teams that want to choose their own language model and voice and pay per minute.
Pros
- A wide choice of language models and voices
- SOC 2, HIPAA, and GDPR coverage
Cons
- Advertises "We guarantee >99.9% uptime", while its terms say "at least 99.5% uptime"
- PII (personal data) Removal adds $0.01 a minute
- No iMessage agents
Pricing: $0.07 to $0.31 per minute depending on the language model and voice, with Retell Voice Infra, GPT-4.1, and an ElevenLabs Flash voice coming to $0.14 per minute before phone.
How were these alternatives ranked?
Each provider was compared on who builds the AI, deployment, how a bill is counted, compliance, and voice realism, with weight on what enterprise calls need. Every claim about a provider comes from its own public pages as read in November 2026, and voice scores come from Design Arena's chart of 4 August 2026.
Closer comparisons sit in Bland vs Retell, Bland vs Synthflow, Bland vs Sierra, and Bland vs Cognigy. Other ranked lists cover Best Replicant alternatives, Best Synthflow alternatives, Best Dialogflow alternatives, and Best Intercom alternatives. A demo built on a real customer workflow is the quickest next step.
How does one call run on Bland and on PolyAI?
A call on Bland stays with one AI company, while a call on PolyAI can touch up to 4 AI companies, counting PolyAI.
1 AI company on each call
$0.14 a minute for all of its AI on self-serve Start, no platform fee
- TranscriptionOwl ASR, or a provider by language
- Language modelRaven, or OpenAI and others
- SpeechOwn voices, or ElevenLabs and Cartesia
Up to 4 AI companies on each call, counting PolyAI
No published rate a buyer gets a quote from sales
How much do PolyAI alternatives cost?
PolyAI alternatives count a bill in different units, from $0.07 to $0.31 per minute on Retell to $0.20 per session on Kore.ai, and Synthflow, Replicant, Cognigy, and Sierra publish no per-minute rate, so no single number settles a comparison.
Bland's self-serve Start plan is $0.14 per minute for all of its AI, before phone. Enterprise pricing is custom, set with Bland's sales team. PolyAI's managed agent has no public rate to set against it, and its model API at 2¢ per connected minute leaves out telephony and orchestration, the logic that runs a conversation turn by turn, so it covers only part of a call.
Every total below is AI before phone. Retell's card adds Retell Voice Infra, GPT-4.1, and an ElevenLabs Flash voice to reach $0.14 per minute, and the other six providers publish no per-minute rate that could be added up, so they have no card.
| Vendor | What a minute pays for | Total per minute | Phone |
|---|---|---|---|
| Bland Start (self-serve) | All AI: model, transcription, speech $0.14 | $0.14 before phone | Billed separately at carrier cost |
| Retell | Voice infrastructure $0.055, GPT-4.1 $0.045, ElevenLabs Flash voice $0.04 | $0.14 before phone | Twilio at $0.015 a minute, billed on top |
Bland Start (self-serve): Self-serve Start has no platform fee. Self-serve Build is $0.12 a minute plus $299 a month. Phone and transfers bill separately. Retell: Retell Voice Infra, GPT-4.1, and an ElevenLabs Flash voice, before Twilio phone minutes.
Which of these sounds most human?
Bland Speech v3 ranked 1st of 13 AI voices on Design Arena's Audio Realism Bench on 4 August 2026, at 1365, and every outside voice in those results that the other providers here offer scored lower.
- #1BlandBland Speech v31365
- 2ndMicrosoftMAI-Voice-21224
- 3rdxAIGrok TTS1156
- 4thOpenAIGPT Realtime 21119
- 5thGoogleGemini 2.5 Pro TTS1109
- 6thCartesia, on PolyAISonic 3.51096
- Not rankedPolyAI's own voicesNot ranked
Ranks are among 13 AI voices, and PolyAI's own voices weren't ranked. Real human recordings scored 1500, at the right edge of this scale. Bars start at 600, not zero. Source: Design Arena's published results.
PolyAI uses outside voice providers, and the highest voice model it uses, Sonic 3.5, ranked 6th at 1096.
On Retell the highest outside voice was OpenAI's GPT Realtime 2, 4th at 1119. ElevenLabs' Eleven v3 ranked 12th at 938, and it is the one outside voice in those results that Synthflow and Cognigy offer.
What does moving off PolyAI involve?
Moving off PolyAI means rebuilding call flows on a new platform, one flow at a time, and keeping phone numbers by connecting a carrier over SIP.
The safest start is one daily flow, rebuilt then run beside PolyAI on a share of live calls. Recordings and transcripts should be exported before an account is closed, and a move is cleanest when it lands at the end of a contract year.
On Enterprise, Bland's forward-deployed engineers work beside a customer's team on its first agent, and the team edits it afterwards.
Norm, Bland's AI assistant, answers questions about calls, builds agents, tests them, and can generate fixes for issues, while staged releases give a new agent version a small share of calls and pause the rollout when a KPI such as escalation rate gets worse.
Frequently asked questions
What is the best alternative to PolyAI?
Bland is the best alternative to PolyAI for enterprise calls as of November 2026, because one company builds every model on a call, Bland publishes a rate for it, and Enterprise customers get dedicated orchestration and dedicated GPUs run by Bland.
How much does PolyAI cost?
PolyAI publishes no rate for its managed agent. It says ongoing use is priced per minute and sends pricing visitors to a form to talk to its team, as of November 2026, and its separate model API costs 2¢ per connected minute without telephony or orchestration.
Which PolyAI alternatives support iMessage?
Bland is the one provider here that runs branded iMessage agents natively, on its Enterprise plan. PolyAI, Synthflow, Replicant, Kore.ai, Voiceflow, and Retell don't offer iMessage agents as of November 2026, and Cognigy doesn't either. Sierra supports Apple Business Chat.
Is Bland only for outbound calls?
No, Bland runs inbound and outbound calls, including AI receptionist and contact center work, and it also runs SMS and web chat.
Is Bland only for developers?
No, Bland isn't only for developers. Pathways gives teams a visual builder, Norm helps build agents, and on Enterprise forward-deployed engineers build alongside a customer's team.
Does Bland use an open-source model?
No, Bland operates a closed-source model that it developed itself, so its language model isn't an open-source model and no outside AI lab sits behind it.
How much does Bland cost per minute compared with PolyAI alternatives?
Bland's self-serve Start plan costs $0.14 per minute for all of its AI, before phone, while Retell advertises $0.07 to $0.31 depending on the model and voice and Kore.ai bills $0.20 per session. PolyAI, Synthflow, Replicant, Cognigy, and Sierra publish no per-minute rate.
Can I keep my phone carrier if I move to Bland?
Yes, Bland connects to a carrier or phone system over SIP, so numbers and routing stay in place.
