# 8 best Vapi alternatives in 2026, compared

By Samuel Oram-Jones

The best Vapi alternatives in 2026 are Bland, Synthflow, PolyAI, Ada, Sierra, Cognigy, Decagon, 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 Vapi alternatives?

The best Vapi alternative for enterprise calls is Bland, because one company builds and runs every AI model on a call, while the other seven providers each rely on outside companies, an undisclosed stack, a managed service, or a quote for part of the work.

- **Bland:** Best overall for enterprise calls
- **Synthflow:** Best for sales-led teams that sign one annual contract
- **PolyAI:** Best for enterprises that want a managed, quoted agent
- **Ada:** Best for chat, email, and voice customer service agents
- **Sierra:** Best for enterprise teams buying outcome-priced agents
- **Cognigy:** Best for contact centers with their own platform team
- **Decagon:** Best for support teams adding voice to chat and email
- **Retell:** Best for developer teams that pick their own model and voice

| Provider | Best for | Price | Who builds the AI | iMessage |
|---|---|---|---|---|
| Bland | Enterprise calls | $0.14 per minute on self-serve Start, $0.12 on self-serve Build plus $299 a month, phone billed separately | Bland builds all of it | Native on Enterprise |
| Synthflow | Sales-led annual contracts | Annual agreement only | Mixed | No |
| PolyAI | Managed, quoted agents | Quote only | Mixed | No |
| Ada | Chat, email, and voice support | Per conversation, no published rate | Undisclosed | No |
| Sierra | Outcome-priced agents | Per outcome, no published rate | Mixed | Business Chat |
| Cognigy | Contact centers with a platform team | Quote only | Other companies | No |
| Decagon | Support teams adding voice | Per conversation or per resolution | Mixed | No |
| Retell | Developer teams | $0.07 to $0.31 per minute, with the model and voice as separate lines | Other companies | No |

## Why do teams look for Vapi alternatives?

Teams look for Vapi alternatives when assembling a voice stack turns into the main job, because Vapi bills hosting at $0.05 per minute and passes a transcriber, a language model, and a voice through at provider cost on top. Vapi's own calculator splits one production minute into hosting, transcriber, model, and voice, so a buyer adds up four price lists before phone.

Contract terms are the second reason. Vapi offers a 99% uptime SLA on its Pro package, with a $999 monthly minimum, and a "99.9% uptime SLA" on Premier through sales. Its HIPAA data handling and Business Associate Agreement, the contract HIPAA requires before a vendor handles patient information, come as a $2,000 monthly add-on.

Speed is the third. Vapi advertises an "average latency-to-response" under 500ms on its enterprise page, while its FAQ says "typically around 800 milliseconds for end-to-end voice processing", so a buyer who needs a firm figure should ask each provider for one in writing.

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 sit in each vendor's call path. A BAA matters for [HIPAA](/hipaa-compliant-voice-ai) work, and card payments need a clear [PCI DSS](/pci-compliant-voice-ai) statement. Each outside language model, speech, or transcription provider is also one more company in a [security review](/blog/call-center-security-best-practices).

Messaging belongs on the same list. A buyer who wants branded iMessage beside voice should ask each provider directly, because Bland runs iMessage agents natively on Enterprise and the other providers here don't offer iMessage agents as of November 2026, apart from Sierra, which supports Apple Business Chat.

## How do the 8 best Vapi 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 weighing a managed service against a platform a team runs itself can read [Bland vs Vapi](/compare/bland-vs-vapi) first, and the [Vapi alternative for enterprises](/alternatives/vapi) covers the move itself. A buyer who also shortlisted Synthflow can read [Best Synthflow alternatives](/blog/synthflow-alternatives) alongside this ranking.

![Bland's homepage, which reads Voice AI for the calls that can't go wrong.](/images/compare/bland-home.jpg)

### 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, with no model, voice, or transcriber to wire together.

**Who is it for?** Enterprises and contact centers in any industry that run high-stakes calls at volume. Bland publishes sub-200ms latency and a 99.9% uptime SLA on every plan, and serves more than 250 enterprise customers. Bland runs its own SIP and media servers, with no third-party telephony provider in the call path.

<div class="cmp-proscons cmp-proscons-own"><div class="cmp-proscons-pros"><p><strong>Pros</strong></p><ul><li>No outside AI lab in the call path, so a security team reviews one AI company</li><li>Dedicated orchestration and dedicated GPUs run by Bland, on Enterprise</li><li>BAA on Enterprise, PCI DSS self-attested, FedRAMP 20x Class A</li><li>Bland Speech v3 ranked first of 13 AI voices on Audio Realism Bench on 4 August 2026</li><li>Forward-deployed engineers on Enterprise</li><li>Native iMessage agents on Enterprise, sharing pathways with voice</li><li>Its own SIP and media servers, with no outside telephony provider in the call path</li><li>Staged releases that pause a new agent version when it performs worse than the last</li></ul></div><div class="cmp-proscons-cons"><p><strong>Cons</strong></p><ul><li>Overkill for a small prototype, because Bland is built for production calls at volume</li></ul></div></div>

**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](https://www.bland.ai/pricing) 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. 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. It says it is "Powered by proprietary orchestration and models from OpenAI, ElevenLabs, Deepgram, and custom in-house logic."

**Who is it for?** Mid-market and enterprise teams that work through a sales-scoped voice platform with WhatsApp and SMS options.

<div class="cmp-proscons" data-rival="synthflow"><div class="cmp-proscons-pros"><p><strong>Pros</strong></p><ul><li>Visual builder</li><li>SOC 2 Type 2, ISO/IEC 27001, HIPAA, and GDPR coverage</li></ul></div><div class="cmp-proscons-cons"><p><strong>Cons</strong></p><ul><li>Annual enterprise agreement only, with no free plan or trial</li><li>No public per-minute rate</li><li>No iMessage agents</li></ul></div></div>

**Pricing:** Annual agreement only.

### 3. PolyAI: Best for enterprises that want a managed, quoted agent

**What does it do?** PolyAI builds and runs a voice and chat agent for a customer on quoted per-minute pricing. Its proprietary Raven model family runs beside OpenAI and Anthropic models served through Amazon Bedrock.

**Who is it for?** Large consumer-facing companies that want PolyAI to build and run their agent, from hotels and restaurants to insurers and telcos.

<div class="cmp-proscons" data-rival="polyai"><div class="cmp-proscons-pros"><p><strong>Pros</strong></p><ul><li>PolyAI handles the build</li></ul></div><div class="cmp-proscons-cons"><p><strong>Cons</strong></p><ul><li>No public per-minute rate for a managed agent</li><li>Its contract says "the total handle time is rounded up to the next 30-second increment"</li><li>Says its systems are "designed to meet HIPAA" where relevant</li><li>No iMessage agents</li></ul></div></div>

**Pricing:** Quote only for a managed agent, and a model API at 2¢ per connected minute with telephony and orchestration not included.

### 4. Ada: Best for chat, email, and voice customer service agents

**What does it do?** Ada sells an agentic customer experience platform that deploys AI customer service agents across voice, messaging, and email.

**Who is it for?** Enterprise support teams that handle high volumes of customer inquiries across several channels.

<div class="cmp-proscons" data-rival="ada"><div class="cmp-proscons-pros"><p><strong>Pros</strong></p><ul><li>Voice, messaging, and email on one platform</li><li>HIPAA, SOC 2, GDPR, and PCI DSS coverage</li></ul></div><div class="cmp-proscons-cons"><p><strong>Cons</strong></p><ul><li>Charges per conversation, and its pricing visitors are sent to a demo booking form with no rate</li><li>Who builds its language, speech, and transcription models is undisclosed</li><li>No iMessage agents</li></ul></div></div>

**Pricing:** Per conversation, with a resolution-based model for enterprises that ask for it, and no published rate.

### 5. 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 now sells a managed AI agent across chat, voice, email, SMS, and WhatsApp, priced by outcome. It says its agents combine "frontier, open-weight, and proprietary models".

**Who is it for?** Enterprise customer experience teams that buy a managed agent and negotiate pricing.

<div class="cmp-proscons" data-rival="sierra"><div class="cmp-proscons-pros"><p><strong>Pros</strong></p><ul><li>Managed agents across chat, voice, email, SMS, and WhatsApp</li><li>SOC 2, HIPAA, GDPR, and ISO 27001 coverage</li></ul></div><div class="cmp-proscons-cons"><p><strong>Cons</strong></p><ul><li>No published rate, with outcome-based pricing</li><li>No self-serve mode</li><li>"Sierra automatically switches between LLM providers to optimize your agent"</li><li>Voice vendor undisclosed</li></ul></div></div>

**Pricing:** Outcome-based, with no published rate.

### 6. Cognigy: Best for contact centers with their own platform team

**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. 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 wire together their own model and speech vendors.

<div class="cmp-proscons" data-rival="cognigy"><div class="cmp-proscons-pros"><p><strong>Pros</strong></p><ul><li>Voice Gateway connects over SIP, with Twilio endpoints for SMS and WhatsApp</li><li>SOC 2 Type II, ISO 27001, and PCI DSS coverage</li></ul></div><div class="cmp-proscons-cons"><p><strong>Cons</strong></p><ul><li>A customer needs "all the necessary API credentials" for each language model it connects</li><li>Pricing runs through a demo request</li><li>No iMessage agents</li></ul></div></div>

**Pricing:** Quote only, after a demo request.

### 7. Decagon: Best for support teams adding voice to chat and email

**What does it do?** Decagon sells AI agents for customer support across chat, email, and voice. It says it uses "both models from the frontier labs, along with our models developed by Decagon Labs".

**Who is it for?** Support teams that want one agent across chat, email, and voice.

<div class="cmp-proscons" data-rival="decagon"><div class="cmp-proscons-pros"><p><strong>Pros</strong></p><ul><li>Chat, voice, and email in one layer</li><li>Supports customers in 70+ languages</li></ul></div><div class="cmp-proscons-cons"><p><strong>Cons</strong></p><ul><li>Prices per conversation or per resolution, and says resolutions "may vary month-to-month, making it tough to forecast costs"</li><li>Calls outside AI providers such as OpenAI and Anthropic</li><li>No iMessage agents</li></ul></div></div>

**Pricing:** Per conversation or per resolution, with larger commitments lowering the rate.

### 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 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.

<div class="cmp-proscons" data-rival="retell"><div class="cmp-proscons-pros"><p><strong>Pros</strong></p><ul><li>A wide choice of language models and voices</li><li>SOC 2, HIPAA, and GDPR coverage</li></ul></div><div class="cmp-proscons-cons"><p><strong>Cons</strong></p><ul><li>Advertises "We guarantee >99.9% uptime", while its terms say "at least 99.5% uptime"</li><li>PII (personal data) Removal adds $0.01 a minute</li><li>No iMessage agents</li></ul></div></div>

**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](/compare/bland-vs-retell), [Bland vs Synthflow](/compare/bland-vs-synthflow), [Bland vs Sierra](/compare/bland-vs-sierra), [Bland vs Decagon](/compare/bland-vs-decagon), and [Bland vs Cognigy](/compare/bland-vs-cognigy), and the [Vapi review](/blog/bland-vs-vapi-which-ai-voice-platform-is-right-for-enterprise) goes deeper on the platform itself. Teams comparing a wider field can also read [Best Thoughtly alternatives](/blog/thoughtly-alternatives). A [demo](https://www.bland.ai/book-a-demo) built on a real customer workflow is the quickest next step.

## How much do Vapi alternatives cost?

Vapi alternatives count a bill in different units, from $0.05 per minute for hosting alone on Vapi to quoted contracts on PolyAI, Synthflow, and Cognigy and per-conversation, per-resolution, or per-outcome pricing on Ada, Decagon, and Sierra, 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 conversation, resolution, or outcome has to estimate how many minutes one of those takes before the two can be set side by side.

![Bland's pricing page, with self-serve Start at $0.14 a minute, self-serve Build at $0.12 a minute, and custom Enterprise pricing.](/images/compare/bland-pricing.jpg)

Every total below is AI before phone. Vapi's card adds hosting to the top of each range its calculator shows for transcription, language model, and voice, and Retell's card adds Retell Voice Infra, GPT-4.1, and an ElevenLabs Flash voice to reach $0.14 per minute.

Ada, Sierra, Decagon, PolyAI, Synthflow, and Cognigy publish no per-minute rate, 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 |
| 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 |
| 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. Vapi: Hosting plus the top of each range on Vapi's pricing calculator, before phone. 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. Vapi had no voice of its own in those results, and every outside voice a Vapi customer can pick that was in them scored lower, with GPT Realtime 2 highest at 1119, 4th.

Retell's own platform voices weren't in the results either, and ElevenLabs' Eleven v3, which Synthflow and Cognigy also offer, ranked 12th at 938. Sierra's voice vendor is undisclosed, so nobody can check how real its agents sound against anyone else's.

See [Design Arena's published results](https://notes.designarena.ai/audio-realism-benchmark-measuring-realism-in-audio-models/).

## What does moving off Vapi involve?

Moving off Vapi means rebuilding call flows on a new platform, one flow at a time, and keeping phone numbers by connecting a carrier over [SIP](https://docs.bland.ai/agents/sip). Teams that are also weighing a flow builder can look at [Best Voiceflow alternatives](/blog/voiceflow-alternatives).

The safest start is a flow a team handles every day, which gets rebuilt and run beside Vapi on a share of live calls. Call logs and recordings should be exported before a cancellation, because Vapi keeps raw data for 14 days on its Usage only package, 30 on Core, and 180 on Pro.

A team that built in code can keep that habit, since Bland's no-code and custom-code paths both end in the same agent, as [No-code vs custom-code voice AI agents](/blog/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. Buyers who started from a chatbot suite may find [Best Yellow.ai alternatives](/blog/yellow-ai-alternatives) useful too.

## Frequently asked questions

### What is the best alternative to Vapi?

Bland is the best alternative to Vapi for enterprise calls as of November 2026, because one company builds every model on a call, a single self-serve rate covers all of its AI, and Enterprise customers get dedicated orchestration and dedicated GPUs run by Bland.

### What is the best Vapi alternative for healthcare?

Bland is the best Vapi alternative for healthcare, because it includes a BAA on Enterprise and keeps outside AI labs out of its call path. Vapi sells HIPAA data handling and a BAA as a $2,000 monthly add-on, so a buyer comparing the two should price both.

### Does Bland build its own AI models?

Yes, Bland builds and runs its own language, speech, and transcription models, so no outside AI lab sits in a Bland call path. Enterprise customers get dedicated orchestration and dedicated GPUs run by Bland.

### Which Vapi alternatives support iMessage?

Bland is the one provider here that runs branded iMessage agents natively, on its Enterprise plan. Synthflow, PolyAI, Ada, Decagon, Retell, and Cognigy 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 Vapi 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 Ada, Decagon, and Sierra count conversations, resolutions, and outcomes. 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.