Compare enterprise voice AI agents and providers
Bland, 8 min read
Bland is the voice AI provider to pick for enterprise calls, because it is full stack: it builds and runs its own language, speech, and transcription models, so no outside AI company sits in a call's path. This page compares Bland with Retell, Vapi, Synthflow, Thoughtly, Decagon, Sierra, ElevenLabs, LiveKit, and Twilio, as of November 2026.
The tables cover voice, deployment, security, and price per minute, and a short summary of each provider follows, with a link to its full comparison.
Which voice AI provider should I use?
For enterprise calls in production, Bland is the better pick as of November 2026. One company builds and runs every AI model on a Bland call, one per-minute rate covers all of that AI, and Enterprise customers get dedicated orchestration and dedicated GPUs run by Bland. Bland operates a closed-source model it developed itself, with sub-200ms response times and a 99.9% uptime SLA on every plan.
Each provider below is summarized in a few sentences, with a full comparison where one is published. Bland isn't only for developers and isn't only for outbound calls: Pathways gives teams a visual builder, and Bland runs inbound and outbound calls, SMS, and web chat.
Bland vs Retell
Retell is a platform for building and monitoring AI voice and chat agents, billed per minute with the model and voice priced as separate lines, and it is built for a small engineering team that wants to monitor, test, and toggle between different language models and voice vendors. The full Bland and Retell comparison covers where calls run and what a minute costs once Twilio phone minutes are added.
Bland vs Vapi
Vapi is a developer platform that hosts voice agents and bills the language model, transcription, and voice from other companies at cost on top, which suits developers who wire each AI provider together themselves. The full Bland and Vapi comparison sets that assembled stack against one integrated platform.
Bland vs Synthflow
Synthflow sells AI voice agents through one annual enterprise contract with telephony, integrations, and launch support scoped in, and it publishes no rate by the minute. The full Bland and Synthflow comparison covers building agents, telephony, and contract terms.
Bland vs Thoughtly
Thoughtly sells AI agents that call, text, and email inbound leads, qualify them, book meetings, and write back to a CRM, mostly for revenue teams with a steady flow of opted-in leads. A full comparison with Bland is linked in the list below.
Bland vs Decagon
Decagon sells AI agents for customer support across chat, email, and voice, priced per conversation or per resolution. The full Bland and Decagon comparison sets phone tasks against broader support automation, and a Decagon alternative for enterprises is covered separately.
Bland vs Sierra
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 and no self-serve mode. The full Bland and Sierra comparison covers phone workflows against outcome-priced service agents, and teams weighing Sierra can also read Best Sierra alternatives.
Bland vs ElevenLabs
ElevenLabs started as a text-to-speech company and then launched ElevenAgents, a platform for voice and text agents with its own speech and transcription models and a choice of its Realtime models or an outside language model, and its call grading looks at transcripts only, not audio. The full Bland and ElevenLabs comparison covers complete phone agents against speech products.
Bland vs LiveKit
LiveKit is an open-source framework and cloud platform for building voice, video, and physical AI agents, with telephony and hosted model access, for engineering teams that write agent code and pick their own models. A full comparison with Bland is linked in the list below.
Bland vs Twilio
Twilio is a cloud communications platform whose Conversation Relay product connects phone calls to a developer's own language model, adding speech recognition and text-to-speech. Bland runs its own SIP and media servers, so no third-party telephony provider sits in a call's path. The full Bland and Twilio comparison covers what a call runs on and what a minute costs.
Which AI voice sounds most like a real person?
- #1BlandBland Speech v31365
- 4thOpenAI, on RetellGPT Realtime 21119
- 4thOpenAI, on VapiGPT Realtime 21119
- 6thCartesia, on PolyAISonic 3.51096
- 6thCartesia, on LiveKitSonic 3.51096
- 12thElevenLabs, on SynthflowEleven v3Near the bottom938
- 12thElevenLabsEleven v3Near the bottom938
- 12thElevenLabs, on CognigyEleven v3Near the bottom938
- Not rankedRetell's own voicesNot ranked
- Not rankedVapi's own voicesNot ranked
- Not rankedPolyAI's own voicesNot ranked
- Not rankedLiveKit's own voicesNot ranked
- Not rankedSynthflow's own voicesNot ranked
- Not rankedCognigy's own voicesNot ranked
Ranks are among 13 AI voices, and each rival shows the highest listed voice a customer can choose on it, named for the company that made it. Real human recordings scored 1500, at the right edge of this scale. Bars start at 600, not zero. Source: Design Arena's published results.
Audio Realism Bench is Design Arena's blind listening test: two voices read one script, vetted native speakers pick whichever sounds more like a real person, and real human recordings sit in that same pool. The chart above shows its published results of 4 August 2026, from Design Arena.
What does a voice AI agent cost per minute?
A headline rate rarely covers a whole call, so the chart totals each provider's published line items before phone. Bland's self-serve Start rate of $0.14 and Build rate of $0.12 each pay for one company's AI, while each rival total also pays for models from other companies. Bland replaced a flat $0.09 rate with Start and Build in December 2025. Enterprise pricing is custom, set with Bland's sales team.
| 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 |
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.
Phone is billed on top for every provider here, and Bland's runs on a customer's own carrier or on Bland's at pass-through 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. Bland's pricing lists every plan row.
How does each platform compare head to head?
Pick a platform to set its figures, gaps, and extra charges beside Bland's.
Retell hands a customer's transcription and language model to other companies, then bills add-ons on top.
On Bland, not on Retell
- Language model in your base rate
- Voice in your base rate
- Language model run in-house
- Transcription run in-house
- iMessage
What Retell charges extra
- Branded Call+$0.10 per outbound call
- Verified phone number$10 a month
- PII Removal+$0.01 per minute
Vapi is a hosting layer: a customer assembles and pays for the AI parts itself.
On Bland, not on Vapi
- Language model in your base rate
- Voice in your base rate
- Language model run in-house
- Transcription run in-house
- iMessage
What Vapi charges extra
- HIPAA add-on$2,000 a month
- Pro package10% of hosting, $999 monthly minimum
- Extra concurrency$10 a month per line
Synthflow sells one annual contract with no public rate.
On Bland, not on Synthflow
- iMessage
- FedRAMP 20x Class A
What Synthflow charges extra
- ContractAnnual agreement only, with no free plan or trial
- RatesNo public per-minute rate
- Contract termsUsage volume can't be decreased
Thoughtly sells three plans with no public rate and builds its product around inbound lead conversion, with a model and voice choice that comes from other companies.
On Bland, not on Thoughtly
- Language model run in-house
What Thoughtly charges extra
- RatesNo public per-minute rate on any plan
Decagon builds its own speech model, but its agents still call outside AI providers such as OpenAI and Anthropic, and it publishes no rates.
On Bland, not on Decagon
- Transcription run in-house
- iMessage
- FedRAMP 20x Class A
What Decagon charges extra
- Per-conversation pricingFixed rate per conversation, with no rate published
- Per-resolution pricingHigher fixed rate per resolved conversation, with no rate published
Sierra builds its agents on a constellation of LLMs that combines frontier, open-weight, and proprietary models, and bills by outcome with no published rate.
On Bland, not on Sierra
- Dedicated GPU clusters
What Sierra charges extra
- Outcome-based pricingPaid per resolved conversation or other agreed outcome, with no published rate
- Routing and greeter interactionsCan be priced per conversation instead
ElevenLabs bills a customer's language model on top of its call minute, and grades calls on transcripts alone, not call audio.
On Bland, not on ElevenLabs
- Language model in your base rate
- iMessage
What ElevenLabs charges extra
- Language modelBilled on top in Custom mode, based on the model chosen
- Burst pricing$0.16 per minute
- PhoneNo telephony fee, and a connected provider bills its own carrier charges
LiveKit is a developer framework and cloud where a team picks speech, transcription, and language models from partner providers and writes its agent in code.
On Bland, not on LiveKit
- Language model in your base rate
- Voice in your base rate
- Language model run in-house
- Transcription run in-house
- iMessage
What LiveKit charges extra
- Ship planFrom $50 a month
- Scale planFrom $500 a month
- Private links$50 each plus $0.10 per GB
Twilio is a phone network API where a developer writes the agent, and Conversation Relay adds speech recognition and voices from other companies in front of a language model the developer brings.
On Bland, not on Twilio
- Language model in your base rate
- Language model run in-house
- Transcription run in-house
What Twilio charges extra
- Local calls$0.0140 a minute to make and $0.0085 to receive
- Local number$1.15 a month
- Premium text-to-speechPriced per 100 characters, $0.0130 for Generative
Which comparison covers each voice AI provider?
Bland vs Retell
where calls run, and what a minute costs.
Bland vs Vapi
one integrated platform or a stack assembled by hand.
Bland vs Synthflow
building agents, telephony, and contract terms.
Bland vs Thoughtly
revenue teams or enterprise calls.
Bland vs Decagon
phone tasks or broader support automation.
Bland vs Sierra
phone workflows or outcome-priced service agents.
Bland vs ElevenLabs
complete phone agents or speech products.
Bland vs LiveKit
a framework engineers build on or a complete platform.
Bland vs Twilio
what a call runs on, and what a minute costs.
Bland vs PolyAI
a platform a team runs or a managed service.
Bland vs Parloa
enterprise calls across many markets.
Bland vs Cognigy
AI infrastructure or contact-center orchestration.
Bland vs Air AI
what to check before buying.
1 of 13 comparisons
Which companies run enterprise call volume on Bland?
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
Teams moving off another provider can start from AI voice agent alternatives by provider, which has a page for each one. Teams leaving Parloa can read Best Parloa alternatives, and a PolyAI alternative for enterprises is covered too.
Frequently asked questions
Which voice AI provider ranked most realistic in Design Arena's 4 August 2026 results?
Bland Speech v3 ranked 1st of 13 AI voices at 1365 in Design Arena's blind listening test of 4 August 2026.
What does full stack mean for a voice AI provider?
A full-stack voice AI provider builds and runs its own language, speech, and transcription models. Bland is full stack, so no outside AI company sits in a call's path, while Retell and Vapi take transcription and language models from other companies and ElevenLabs uses an outside language model unless a customer picks its hosted one.
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.
Does Bland's rate include phone?
No, Bland's rate covers its language model, transcription, and speech, and phone is billed separately, on a customer's own carrier or on Bland's at pass-through cost.
How much does Bland cost per minute?
Bland costs $0.14 per minute on its self-serve Start plan and $0.12 per minute on self-serve Build, which adds a $299 monthly platform fee, and phone is billed separately. Bland replaced its earlier flat $0.09 rate with these plans in December 2025. Enterprise pricing is custom, set with Bland's sales team.
Which voice AI providers support iMessage?
Bland runs native, branded iMessage agents on Enterprise, on the same pathways as its voice agents. As of November 2026, Retell, Vapi, Synthflow, Decagon, ElevenLabs, and LiveKit don't offer iMessage agents, Thoughtly offers iMessage on every plan through partner integrations via Linq, Sierra supports Apple Business Chat, and Twilio offers Apple Messages for Business as a private beta.
How do enterprise voice AI providers compare side by side?
Ten voice AI providers sit in four tables, and each table is followed by what its rows mean. A cell reads No where a provider's own pages, checked on 5 November 2026, publish nothing on that row.
Voice and channels
Bland ranked first of 13 AI voices in Design Arena's results of 4 August 2026, and it runs native iMessage agents on Enterprise, which share pathways with its voice agents. Most providers here don't offer iMessage agents, with three exceptions: Thoughtly offers iMessage on every plan through partner integrations via Linq, Sierra supports Apple Business Chat, and Twilio offers Apple Messages for Business as a private beta.
What these rows mean
- Audio Realism Bench score, 4 August 2026: Audio Realism Bench is Design Arena's blind listening test, where listeners pick whichever of two voices sounds more like a real person, and a higher score means listeners picked that voice more often. In its published results of 4 August 2026, Bland Speech v3 ranked first among AI voices. Each rival number is the highest-scoring voice model in those results available on that platform. Not ranked for Thoughtly means Thoughtly doesn't publish its voice model, so none was ranked. Not ranked for Decagon means Decagon's own Chord speech model wasn't ranked, though Cartesia and ElevenLabs, the outside voice companies on its subprocessor list, were. Not ranked for Sierra means Sierra doesn't publish its voice vendor, and no voice carrying its name was ranked. Not ranked for Twilio means no voice Conversation Relay offers was ranked: not ElevenLabs Flash 2 or Flash 2.5, Google Text-to-Speech, or Amazon Polly.
- Voice cloning: Voice cloning lets an agent speak in a chosen voice, and one-shot means a single audio sample is enough. Bland clones a voice from 10 seconds of audio in seconds, or builds a studio clone from 10 minutes or more. On Vapi, cloning happens at the customer's voice provider. Decagon offers custom-tuned voices, and no Decagon page describes cloning a voice from a customer sample. Sierra designs custom voices for its customers, and no Sierra page describes cloning a voice from a sample. On LiveKit, cloning happens at the customer's voice provider.
- iMessage: iMessage lets an agent text customers on a channel they already use. Bland offers it natively on Enterprise. Thoughtly offers iMessage on every plan, through partner integrations via Linq. Sierra supports Apple Business Chat. Twilio offers Apple Messages for Business as a private beta that a customer applies to join.
Deployment
A platform can run inside a customer's environment only as far as its own AI does, and where the language model belongs to another company, that part of a call still runs there. Enterprise customers get dedicated orchestration and dedicated GPUs run by Bland.
What these rows mean
- Dedicated infrastructure: Dedicated infrastructure means calls don't share capacity with other customers. On Enterprise, Bland gives a customer its own isolated tenant on dedicated GPU clusters, with its own models set aside. Retell sells a dedicated server as an add-on. On Vapi, SIP only means its Premier package offers dedicated SIP, the standard connection between a phone system and a voice platform, and it publishes no dedicated compute. Synthflow runs each enterprise workspace in a single-region US or EU cluster, with all data and processing in that region.
Security and compliance
Most providers hold the same audits, so the differences sit in the conditions attached. A BAA is the Business Associate Agreement a health-data vendor signs, and PII means a caller's personal details, which Bland redacts in real time. Bland's PCI DSS status is self-attested and shared under NDA on Enterprise, not certified by an outside assessor.
Each concept has a page of its own: HIPAA compliant voice AI, PCI compliant voice AI, and Voice AI PII redaction.
What these rows mean
- HIPAA with a BAA: A Business Associate Agreement, or BAA, is the contract that lets a vendor handle patient information under HIPAA. Bland includes its BAA on Enterprise. Vapi sells HIPAA mode as a $2,000 monthly add-on. On Decagon, HIPAA listed, no BAA stated means Decagon reports HIPAA compliance and doesn't publish a BAA. On Sierra, HIPAA report, no BAA stated means Sierra publishes a HIPAA audit report and doesn't publish a BAA. Zero Retention only means ElevenLabs' BAA applies only while Zero Retention Mode is on, which limits the language models and analytics a customer can use. Twilio signs a BAA only with customers on its Security Edition or Enterprise Edition, and only for products on its HIPAA eligible list.
- PII redaction: PII redaction removes personal details from recordings and transcripts. Bland redacts them in real time. Retell charges $0.01 a minute for PII Removal as an add-on. On Vapi, Partial means redaction is a Deepgram transcriber setting and not a platform-wide feature. Synthflow's redaction covers transcripts, webhook payloads, and internal logs, and Synthflow says real-time audio is not affected. Decagon redacts just after a conversation ends, on logs and transcripts. ElevenLabs' conversation history redaction is for enterprise clients. Twilio offers Message Redaction and Voice Recording Encryption, and doesn't offer voice redaction.
- PCI DSS: PCI DSS is a security standard from the card industry for handling card details. Bland self-attests to v4.0.1 and shares its attestation under NDA on Enterprise. Retell gives no PCI status, and it bars card data unless it agrees in writing. Twilio lists PCI DSS Level 1 and says the credentials listed do not apply to every product.
- FedRAMP: FedRAMP is the US government's cloud security program. Bland holds 20x Class A. Sierra holds FedRAMP High through Knox Systems, under whose platform it is listed, rather than an authorization of its own. ElevenLabs holds 20x Class A.
- ISO 27001: ISO 27001 is an international standard for managing information security.
- SOC 2 Type II: SOC 2 Type II is an independent audit of how well a company's security controls work over time.
- GDPR: GDPR governs personal data from people in the EU.
Pricing
Bland publishes self-serve Start at $0.14 a minute and self-serve Build at $0.12 plus $299 a month, both covering its language model, transcription, and speech, and phone is billed separately. Enterprise pricing is custom, set with Bland's sales team. A cell reading Quote means a provider sells by quotation, and LiveKit's Per model means its rate depends on the models a team picks.
What these rows mean
- AI rate per minute: Headline rates cover different things, so a buyer should check what each one includes before comparing them. Bland's self-serve rate covers all of its AI: language model, transcription, and speech. Phone is billed separately at carrier cost, and Enterprise pricing is custom, set with Bland's sales team. Retell advertises $0.07 to $0.31 a minute, and one language model alone lists at $0.384 a minute. Vapi's $0.05 is hosting only, with language model, transcription, and voice billed at provider cost on top. Synthflow publishes no per-minute rate and sells an annual contract. Decagon prices per conversation or per resolution and publishes no rate. Sierra prices by outcome and publishes no rate. ElevenLabs' $0.08 is for call minutes past a plan's allowance, with the language model billed on top. Twilio's Conversation Relay costs $0.07 a minute and the language model is the customer's own.
- Transcription in the base rate: Some platforms fold transcription into their base rate and others bill it on top. Bland's rate covers transcription. Vapi bills transcription at provider cost on top of its $0.05 hosting fee.
- Language model in the base rate: This row shows whether a language model's cost sits inside the rate or is added on top of it. Bland's rate covers its language model. Retell bills its language model on top, priced by the chosen model. Vapi bills its language model at provider cost on top of hosting. ElevenLabs bills its language model "separately on top, based on the model you choose".
- Voice in the base rate: Whether voice sits inside a base rate decides if a customer pays a separate voice provider. Bland's rate covers its voices. Retell bills voice on top, and a premium voice adds about $0.04 a minute. Vapi bills voice at provider cost on top of hosting. ElevenLabs includes speech in its call minute.
- Monthly platform fee: A platform fee is a monthly charge on top of per-minute rates. Bland's self-serve Start plan has no platform fee, and self-serve Build is $299 a month. Vapi's Pro package is 10% of hosting with a $999 monthly minimum.
- Phone number per month: Phone numbers are billed monthly, and what counts as included depends on the plan. Bland's Start plan includes one inbound number, and further numbers are $15 a month. Retell adds $10 a month for a verified number. Vapi includes one free Vapi number, and imported numbers are billed by the customer's provider. ElevenLabs charges no telephony fee, and the customer's own phone provider bills for the carrier side of a call.
- Enterprise pricing: Enterprise pricing is set per customer, so Custom means a buyer gets a price from sales. Synthflow sells only an annual contract, with no free plan or trial.
Sources
Bland trust and security, Bland pricing, Bland customer stories, and Design Arena's published results.
