8 best Yellow.ai alternatives in 2026, compared
Samuel Oram-Jones, 12 min read
The best Yellow.ai alternatives in 2026 are Bland, Kore.ai, Sierra, PolyAI, Synthflow, ElevenLabs, Vapi, and Retell, and Bland ranks first for enterprise calls because it is full stack. This ranking compares each provider on who builds the AI, how a bill is counted, and where calls can run, as of November 2026.
What are the best Yellow.ai alternatives?
The best Yellow.ai alternative for enterprise calls is Bland, because one company builds and runs every AI model on a call, while the other seven providers each lean on outside companies, a quote, or a billing unit other than the minute.
- Bland: Best overall for enterprise calls
- Kore.ai: Best for enterprises building chat and voice agents
- Sierra: Best for enterprise teams buying outcome-priced agents
- PolyAI: Best for enterprises that want a managed, quoted agent
- Synthflow: Best for sales-led teams that sign one annual contract
- ElevenLabs: Best for teams that already build on ElevenLabs voices
- Vapi: Best for developers assembling their own voice stack
- Retell: Best for developer teams that pick their own model and voice
Why do teams look for Yellow.ai alternatives?
Teams look for Yellow.ai alternatives when phone calls are the work and chat is the side channel, because Yellow.ai sells an agentic customer service platform for chat, voice, and email, and it advertises "Automated interactions across 35+ channels". A team running high volumes of calls tends to want the voice AI agent, its price per minute, and its deployment options at the center.
Billing is the second reason. Yellow.ai lists a Free plan at "500/month included, then $0.99 per resolution" and an Enterprise plan that reads "Contact us", and it publishes no per-minute rate for voice as of November 2026. A finance team then models call cost from resolutions, while Bland, Vapi, Retell, and ElevenLabs count a bill in minutes.
Models are the third. Yellow.ai says its platform runs on "15+ cutting edge LLMs" and its LLM providers are undisclosed, so a security team that has to name every company a call touches cannot finish that list for Yellow.ai.
Buyers should check a few things before switching. Security rules decide which companies may handle a call, so it is worth asking which AI models each vendor uses. 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.
Messaging belongs on the same list. Yellow.ai offers WhatsApp, Google Business, Instagram, and Slack among its channels and doesn't offer iMessage agents, while Bland runs iMessage agents natively on Enterprise, and Kore.ai, PolyAI, Synthflow, ElevenLabs, Vapi, and Retell don't offer iMessage agents either, as of November 2026.
How do the 8 best Yellow.ai alternatives compare?
These eight providers differ most in how much of a call they build themselves, and Bland is the one that builds all of it. A buyer comparing platforms built for chat with platforms built for calls can read Prompt-based agents vs conversational pathways first, and the AI customer service agent platforms list covers the chat side.
Readers who want a head-to-head across several of these providers can open Bland vs Retell vs Vapi vs Air, and AI voice agent alternatives by provider groups the wider field.
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, and a Yellow.ai customer's voice flows can be rebuilt there one at a time.
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.
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 a separate plan. 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. 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, which is the same shape of buyer Yellow.ai serves.
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 a session is the billing unit on Enterprise too
- 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.
3. Sierra: Best for enterprise teams buying outcome-priced agents
What does it do? Sierra started as a chat-first platform for customer service and added voice later, and it sells a managed AI agent across chat, voice, email, SMS, and WhatsApp, priced by outcome with no published rate. It says "Sierra gets paid only when we complete a task for you", and it adds that routing or greeter-style interactions may fit consumption-based pricing better.
Who is it for? Enterprise customer experience teams that buy a managed agent and negotiate pricing.
Pros
- PCI DSS Level 1 Service Provider certification
- Supports Apple Business Chat among its messaging channels
Cons
- No published rate, because pricing follows outcomes, and no self-serve mode
- Builds its agents on a mix of frontier, open-weight, and proprietary models
Pricing: No published rate, with outcome-based pricing negotiated per customer.
4. PolyAI: Best for enterprises that want a managed, quoted agent
What does it do? PolyAI builds and runs a voice or chat agent for a customer on a quoted per-minute price, and it sells a Dialog-RSN-1 model API at 2¢ a minute.
Who is it for? Large consumer-facing companies that hand the build and running of their agent to PolyAI.
Pros
- PolyAI handles the build
- Its own Raven model alongside OpenAI and Amazon Bedrock models
Cons
- No public per-minute rate for the managed service
- Its managed-service agreement says "the total handle time is rounded up to the next 30-second increment"
- No iMessage agents
Pricing: Quote only for the managed service.
5. Synthflow: Best for sales-led teams that sign one annual contract
What does it do? Synthflow sells AI voice agents through one annual enterprise contract with telephony, integrations, and launch support scoped in.
Who is it for? Mid-market and enterprise teams that work through a sales-scoped voice platform with WhatsApp and SMS options.
Pros
- Visual builder
- Its own model, with GPT models on Enterprise
Cons
- Annual enterprise agreement only, with no free plan or trial
- No public per-minute rate
- It says it is "Powered by proprietary orchestration and models from OpenAI, ElevenLabs, Deepgram, and custom in-house logic."
- No iMessage agents
Pricing: Annual agreement only.
6. ElevenLabs: Best for teams that already build on ElevenLabs voices
What does it do? ElevenLabs started as a text-to-speech company and now sells voice agents built around its own voices, paired with one of its Realtime models or a language model the customer chooses.
Who is it for? Teams already on ElevenLabs voices that will choose and manage their own language model.
Pros
- Own voices and its own Realtime models
- Runs its own speech and transcription
Cons
- Language model usage billed on top in Custom mode
- Call grading looks at transcripts only, not audio
- BAA applies only while Zero Retention Mode is on, which limits language models and analytics
- Eleven v3 ranked 12th of 13 AI voices on Audio Realism Bench on 4 August 2026
- No iMessage agents
Pricing: $0.08 per minute past a plan's allowance, with no telephony fee and language model usage billed on top in Custom mode.
7. Vapi: Best for developers assembling their own voice stack
What does it do? Vapi hosts voice agents, and a team picks and pays for each model and voice.
Who is it for? Engineers who assemble and manage everything themselves.
Pros
- A team can choose every model and voice
- Phone is free on Vapi numbers
Cons
- Language model, transcription, and voice billed at provider cost on top
- HIPAA mode is a $2,000 monthly add-on
- No iMessage agents
Pricing: $0.05 per minute for hosting, with each model and voice billed on top at provider cost.
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? A small engineering team that wants to monitor, test, and toggle between different language models and voice vendors, and pays 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.
Each provider's pricing, deployment, and compliance details were captured from its own public pages in November 2026 and dated, so a figure here is as of that capture, with Design Arena's published Audio Realism Bench as the outside source for voice ranking.
Closer comparisons sit in Bland vs Retell, Bland vs Vapi, Bland vs Synthflow, Bland vs Sierra, and Bland vs ElevenLabs, and the Best Vapi alternatives list covers another provider buyers compare, as Best Voiceflow alternatives does for teams coming from a flow builder. A demo built on a real customer workflow is the quickest next step.
How much do Yellow.ai alternatives cost?
Yellow.ai alternatives count a bill in different units, from $0.05 per minute for hosting alone on Vapi to $0.20 per session on Kore.ai and $0.99 per resolution on Yellow.ai, so no single rate 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. A team that pays by resolution or session has to estimate how many minutes one of those takes before the two can be set side by side.
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.
Vapi's card adds hosting to the top of each range Vapi says its providers run, and ElevenLabs' card adds the calculator's default model to a call minute.
Yellow.ai and Kore.ai bill by resolution or session, and Sierra, PolyAI, and Synthflow publish no per-minute rate for their managed service, so no minute bill can be added up for them.
| 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 |
| Vapi | Hosting $0.05, Transcription $0.0099, Language model $0.0452, Voice $0.0238 | $0.1289 before phone | Free on Vapi numbers, billed on top on Twilio at up to $0.014 a minute |
| ElevenLabs Agents | Call minute $0.08, Gemini 2.5 Flash, the calculator's default model $0.0029 | $0.0829 before phone | No ElevenLabs telephony fee, with a connected provider billing 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. Vapi: Hosting plus the top of each range on Vapi's pricing calculator, before phone. ElevenLabs Agents: ElevenLabs call minute plus its pricing calculator's default model, before the customer's own phone provider.
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 let a customer choose scored lower.
- #1BlandBland Speech v31365
- 2ndMicrosoftMAI-Voice-21224
- 3rdxAIGrok TTS1156
- 4thOpenAIGPT Realtime 21119
- 5thGoogleGemini 2.5 Pro TTS1109
- Not rankedYellow.ai's own voicesNot ranked
Ranks are among 13 AI voices, and Yellow.ai'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.
On Retell and Vapi the highest outside voice was OpenAI's GPT Realtime 2, 4th at 1119. ElevenLabs' Eleven v3 ranked 12th at 938. Yellow.ai's voices, Retell's own platform voices, and Vapi's own voices were not in the results either.
What does moving off Yellow.ai involve?
Moving off Yellow.ai means rebuilding conversation flows on a new platform, one flow at a time.
The safest start is a voice flow a team handles every day, which gets rebuilt and run beside Yellow.ai on a share of live calls.
Transcripts and recordings should be exported before a contract ends. A team that spans chat and calls can move voice first and leave chat where it is, since Bland's no-code and custom-code paths both end in the same call flows, as No-code vs custom-code voice AI agents explains. On Enterprise, Bland's forward-deployed engineers work beside a customer's team on its first agent.
Frequently asked questions
What is the best alternative to Yellow.ai?
Bland is the best alternative to Yellow.ai for enterprise calls as of November 2026, because one company builds every model on a call, and Enterprise customers get dedicated orchestration and dedicated GPUs run by Bland.
How much does Yellow.ai cost?
Yellow.ai lists a Free plan at "500/month included, then $0.99 per resolution" and an Enterprise plan that reads "Contact us", with no per-minute voice rate, as of November 2026.
Which Yellow.ai alternatives support iMessage?
Bland is the one provider here that runs branded iMessage agents natively, on its Enterprise plan. Yellow.ai, Kore.ai, PolyAI, Synthflow, ElevenLabs, Vapi, and Retell don't offer iMessage agents as of November 2026, and 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 Yellow.ai alternatives?
Rates run from $0.05 per minute for hosting alone on Vapi to $0.07 to $0.31 on Retell depending on the model and voice, while Yellow.ai and Kore.ai count resolutions and sessions. Bland is $0.14 per minute on self-serve Start for all of its AI, before phone. Enterprise pricing is custom, set with Bland's sales team.
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.
