5 Best Retell AI Alternatives for AI Voice Agents in 2026

Retell AI can help a technical team build a capable voice agent. The harder question is whether it also gives sales, RevOps or support teams enough control over routing, transfers, follow-up and post-call outcomes.

You are probably comparing Retell AI alternatives because one part of the voice-agent motion is creating friction. Maybe latency, interruption handling, or telephony setup is the thing your team keeps testing. Another team may care more about HIPAA, data residency, call monitoring, warm transfers, or the cost of running thousands of minutes per month.

Or, you may like Retell’s agent builder but still need the post-call workflow to update the CRM, send the SMS, trigger the email, route the owner, and measure the outcome.

The 2026 market reality is that AI voice agents are no longer a novelty layer for phone calls. Buyers now compare them as production systems: speech quality, agent control, inbound and outbound calling, batch calling, testing, QA, compliance, handoff, and the work that happens after the call.

There is a bigger thing worth flagging before we get into the list: an AI voice agent differs from an autonomous revenue engine. That category distinction changes which vendors actually solve your problem. The stronger system acts on the right revenue moment through the right channel, then drives the next outcome.

In this post, we will cover the Retell baseline, how we evaluated the alternatives, and then compare five platforms. After that, we will give you a fit map so you can choose based on your actual constraints: lower latency, lower per-minute cost, no-code building, better telephony, healthcare compliance, higher concurrency, contact-center integration, or connected revenue workflows. By the end, you will know where Retell still makes sense and where another platform deserves the meeting.

Let’s get started.

TL;DR - Best Retell AI Alternatives Based on Use Case

1. Outcraft AI - Best for connected revenue workflows.
2. Vapi - Best for engineering teams that want provider-level control.
3. Bland AI - Best for high-volume programmable calling.
4. Synthflow - Best for enterprise voice AI deployments with managed rollout.
5. ElevenAgents by ElevenLabs - Best for voice quality, multilingual agents, and product-led conversational experiences.

Retell is a solid builder for AI phone, chat, and SMS agents. Outcraft fits when the AI voice agent must trigger the next revenue action across calls, SMS, email, WhatsApp, CRM ownership, and measurable outcomes.

Retell AI baseline before you compare alternatives

Retell is best for teams that want to build, test, deploy, and monitor AI phone agents with a low-to-no-code builder, API access, simulation testing, call analytics, transcripts, webhooks, batch calling, call transfer, post-call analysis, AI QA, chat agents, and SMS agents.

• Starting price: Retell starts with $10 in free credits. AI voice agents run $0.07 to $0.31 per minute, and AI chat agents start at $0.002 per message.

• Included concurrency: Pay as you go includes 20 free concurrent calls. Enterprise moves concurrency, support, uptime, compliance, data handling, and contract terms into a custom plan.

• Main strengths: Retell is strong when you want a practical AI voice-agent builder with templates, simulation testing, analytics, transcripts, webhooks, phone deployment, chat, SMS nodes, two-way SMS agents, batch calling, and contact-center-adjacent controls such as transfers and QA.

• Main limitations: The workflow still needs design work. You have to decide which moments deserve a call, which ones move to SMS, which ones need email or WhatsApp, how CRM ownership works, who reviews exceptions, and how the system proves the outcome. Retell can support many of those pieces, but the revenue operating model is still yours to build.

• When switching is unnecessary: Stay with Retell if your team is happy with its builder, pay-as-you-go economics, 20 included concurrent calls, SMS and chat expansion, testing tools, and the engineering ownership required to connect it to the rest of your stack.

How we evaluated these Retell AI alternatives

The ranking is not a claim that every buyer should pick the same tool. I looked at the criteria I would use as a GTM owner responsible for turning an AI voice agent into a working revenue system.

• Voice quality and production reliability: The agent has to sound natural, handle interruptions, work across background noise, support the right languages, and stay stable under real call volume.

• Agent-building control: Some teams need a no-code builder. Others need API-first control over speech-to-text, LLMs, text-to-speech, prompts, dynamic variables, tools, and routing logic.

• Telephony and human handoff: Inbound and outbound calling, native versus third-party telephony, warm transfers, cold transfers, batch calling, verified numbers, and live takeover matter when the agent leaves the lab.

• CRM and post-call orchestration: A good call is wasted when the transcript, disposition, next step, booking link, payment link, or account owner does not move with it.

• Security and compliance: SOC 2, HIPAA, PCI, BAAs, data residency, retention controls, SSO, RBAC, and audit needs change the shortlist quickly.

• Total operating cost: The real cost includes platform fees, per-minute rates, telephony, LLM, speech-to-text, text-to-speech, transfer charges, add-ons, support, and the people who own the workflow after launch.

• Ease of ownership after launch: The best tool for a developer is not always the best tool for RevOps, sales, support, lifecycle, or ecommerce. Ownership after launch matters because manual follow-up does not scale.

5 Best Retell AI Alternatives For AI Voice Agents

Here is the balanced comparison before we get into each alternative:

#1. Outcraft AI 

Outcraft AI is best for connected revenue workflows. It is the Retell alternative I would consider when the problem is no longer “can we build an AI voice agent?” and has become “can this agent move revenue forward after the call?”

Outcraft AI is an autonomous revenue engine for voice-led follow-up across calls, SMS, email, and WhatsApp

Compared with Retell AI, Outcraft is less about giving builders raw voice-agent infrastructure and more about coordinating the revenue motion around the conversation. A demo request lands. This is the highest-intent moment in the funnel. Call inside five minutes, and fall back to SMS with a booking link. If the buyer books, confirm by email. If the account needs context, route the owner with the transcript and next step attached.

That is the core difference. Retell can help you build phone, chat, and SMS agents. Outcraft coordinates calls, SMS, email, WhatsApp, CRM ownership, and outcome tracking around the revenue moment.

We wrote a full guide on AI voice agents for context on how the voice category breaks down when revenue outcomes are the scoring lens.

Outcraft AI vs Retell AI

Pricing

Contact sales / demo-based.

Outcraft pricing is not public. The cost depends on the use case, channels in play, volume, CRM or commerce data, implementation needs, and the operational work the platform removes. A single phone-agent prototype will usually be lighter elsewhere. A revenue system that needs the right revenue moment through the right channel is where Outcraft earns the conversation.

Pros

• Built around moment, channel, outcome instead of only agent configuration.
• Covers calls, SMS, email, and WhatsApp, which matters when the buyer misses the call or needs a link.
• Route exceptions to the right owner with account context, transcript, attempted channel, and next step attached.
• Fits inbound lead conversion, demo booking, abandoned-cart recovery, failed-payment recovery, churn prevention, activation, post-purchase upsell, and inbound call handling.

Cons

• Pricing is not public, so teams need a sales conversation before cost modeling.
• It is heavier than a single-channel phone-agent builder when you only need a prototype.
• Teams with messy CRM or commerce data may need cleanup before autonomous revenue workflows can act cleanly.

Summary

Disclosure: We build Outcraft, and we are placing it first for the reader whose Retell AI alternative search is really about connected revenue workflows after the call.

Who should not choose Outcraft: Choose Retell or Vapi when engineering wants raw voice infrastructure and provider-level control. Pick ElevenAgents by ElevenLabs when the main job is the voice experience inside a product. Synthflow will be easier for enterprise buyers who want a managed voice deployment and do not need calls, SMS, email, WhatsApp, CRM ownership, and outcome tracking in one system.

#2. Vapi

Vapi is best for engineering teams that want provider-level control over their AI voice-agent stack. Compared with Retell AI, it feels more infrastructure-oriented: your team controls model choices, provider economics, assistant configuration, integrations, and how the voice layer connects to the rest of the product.

Vapi: developer infrastructure for customizable AI voice agents

Vapi pricing page for usage-based AI voice-agent infrastructure

Vapi helps when your team cares about latency tuning, bring-your-own-key economics, custom provider selection, API-first agent building, and deeper control over the stack. A developer-led team can tune speech-to-text, LLM, text-to-speech, telephony, tool calls, prompts, and logging around its own product requirements.

The tradeoff is ownership. RevOps can get a powerful agent, but engineering usually owns more of the build and more of the changes after launch.

Vapi vs Retell AI

Pricing

Vapi Build starts at $0.05 per call minute for Vapi hosting, with 60+ free minutes and model costs passed through. SMS and chat hosting is $0.005 per message. Scale is an annual contract with a fixed platform fee, committed volume, enterprise SOC 2, HIPAA, PCI, SSO, RBAC, support SLA, and a dedicated account team. HIPAA adds $2,000 per month, and Zero Data Retention adds $1,000 per month.

At 10,000 call minutes, Vapi hosting alone is 10,000 x $0.05 = $500 before model, telephony, support, compliance, and internal build time. That can be efficient when engineering is already owning the voice stack.

Pros

• Strong technical control for teams that want to choose providers and tune the agent stack.
• Usage-based hosting makes the infrastructure cost easy to model before provider costs.
• SMS and chat hosting are available for teams building multimodal agents.
• Enterprise add-ons cover the security requirements serious buyers ask about.

Cons

• Provider pass-through costs can make the all-in cost harder for non-technical buyers to predict.
• RevOps teams may rely on engineering for prompt changes, tool calls, integrations, and QA workflows.
• A working voice agent still needs surrounding logic for CRM updates, post-call follow-up, and owner routing.
• HIPAA and Zero Data Retention add meaningful monthly cost before usage.

Summary

Vapi is the right Retell AI alternative when the buyer wants engineering control more than a packaged GTM workflow. Outcraft fits better when the voice agent has to become part of connected revenue workflows across calls, SMS, email, and WhatsApp.

#3. Bland AI

Bland AI is best for high-volume programmable phone operations. Compared with Retell AI, Bland puts more emphasis on running call-heavy workflows with bundled AI minutes and operational controls around outbound and inbound phone agents.

Bland can fit teams that care about batch calling, transfer rates, call concurrency, inbound phone numbers, voice clones, knowledge bases, and predictable per-minute AI rates. If the team wants to push many calls and prefers a simpler bundled AI rate instead of separate LLM, speech-to-text, and text-to-speech line items, Bland deserves a close look.

The main question is what happens after the call. A phone-heavy operation can still need CRM updates, SMS fallback, email confirmation, WhatsApp reminders, QA review, and human handoff.

Bland AI vs Retell AI

Also Read - In-Depth Bland AI Review: Is It Worth It as an Omnichannel Tool?

Pricing

Bland Start runs $0.14 per minute with a $0 platform fee, two free credits, no card required, 10 concurrent calls, 100 calls per day, one voice clone, and 10 knowledge bases. Build adds a $299 monthly platform fee at $0.12 per minute. Scale adds a $499 monthly platform fee at $0.11 per minute. Enterprise gates custom concurrency, on-prem or VPC deployment, BAA, SSO, data residency, and forward-deployed engineering.

At 10,000 minutes, Start is 10,000 x $0.14 = $1,400 before telephony and add-ons. Build is $299 + (10,000 x $0.12) = $1,499. Scale is $499 + (10,000 x $0.11) = $1,599.

Pros

• Bundled per-minute AI pricing is easier to understand for call-heavy teams.
• Batch calling, concurrency, voice clones, and knowledge bases fit outbound and inbound phone operations.
• Enterprise options cover deployment and compliance needs for larger buyers.
• The plan ladder makes volume tradeoffs clearer than a fully custom quote.

Cons

• Start caps daily calls and concurrency, which can matter for campaign-style usage.
• Telephony and transfer costs still sit around the core AI rate.
• The broader post-call revenue workflow still needs design outside the phone-agent layer.
• Smaller teams may find the jump to platform fees early if usage is still experimental.

Summary

Bland AI is the Retell AI alternative I would test when the call volume itself is the constraint. Outcraft belongs in the conversation when the call is only the first step, and the team needs follow-up, CRM ownership, and outcome tracking after the conversation.

#4. Synthflow

Synthflow is best for enterprise voice AI deployments with managed rollout. Compared with Retell AI, Synthflow is less self-serve and more implementation-led: the buyer brings a use case, and the vendor helps scope, launch, support, and optimize the voice deployment.

Synthflow can be a good fit when an enterprise team needs handoff logic, fallback flows, CRM or contact-center integrations, testing, training, support terms, security review, and launch help. That matters when the buyer has a defined use case and wants less internal build load.

Retell is better for fast self-serve building. Synthflow is better when procurement, implementation, SLA, and support model matter as much as the first agent.

Synthflow vs Retell AI

Also Read - 5 Best Synthflow AI Alternatives for AI Voice Agents in 2026

Pricing

Synthflow enterprise contracts start at $30,000 annually. No free plan or trial is published. The contract gates enterprise SLA and support terms, custom concurrency planning, routing, escalation paths, handoffs, fallback logic, CRM and contact-center integrations, MSA/DPA support, data handling review, onboarding, testing, training, launch support, and ongoing optimization.

The simple math is $30,000 per year / 12 = $2,500 per month before any scoped expansion. That can make sense when the voice deployment is already approved, and internal implementation capacity is the bottleneck.

Pros

• Managed rollout helps enterprise buyers move from use case to launch with less internal build work.
• Handoff, fallback, CRM, and contact-center integration work can be scoped into the engagement.
• Enterprise support, MSA/DPA handling, and launch assistance fit larger procurement paths.
• Useful when the team knows the voice use case and wants help operationalizing it.

Cons

• The entry cost is high for teams still testing whether AI voice agents fit the motion.
• Self-serve builders may prefer Retell or Vapi because they can experiment faster.
• The contract path can be too much of a process for one demo-booking or call-routing workflow.
• Omnichannel revenue follow-up still depends on how the deployment is scoped.

Summary

Synthflow is the Retell AI alternative for buyers who want a managed enterprise voice AI deployment. Outcraft fits when the enterprise question is broader: how do calls, SMS, email, WhatsApp, CRM ownership, and measurable outcomes work together after launch?

We have a longer dive on omnichannel conversational AI agents if you want the full setup walkthrough.

#5. ElevenAgents by ElevenLabs

ElevenAgents by ElevenLabs is best when the voice experience, multilingual coverage, agent configuration, monitoring, text and voice interaction, and conversational product experience are the main reasons to switch. Compared with Retell AI, ElevenAgents is less focused on being a phone-agent operations platform and more focused on high-quality conversational agents powered by a deep speech and audio platform.

ElevenAgents now belongs in the voice-agent shortlist beyond pure text-to-speech. It supports configurable agents, workflows, monitoring, text and voice interactions, telephony options, knowledge bases, RAG, multilingual voices, voice cloning, and API access. Product teams should evaluate it when the agent’s voice, latency, language handling, and audio realism affect adoption.

The tradeoff is GTM ownership. ElevenAgents can power a strong conversational experience, but booking, payment recovery, churn prevention, owner routing, email, WhatsApp, and revenue reporting still need a workflow around the agent.

ElevenAgents vs Retell AI

Pricing

Free is $0 and includes 15 call minutes, $0.08 additional call minutes, $0.003 text messages, $0.16 burst minutes, and four concurrent calls. Starter is $6 per month with 75 included call minutes, six concurrent calls, the same $0.08 additional call rate, and the same $0.003 text-message rate.

Creator is $22 per month with 275 included call minutes and 10 concurrent calls. Pro is $99 per month with 1,238 included call minutes and 20 concurrent calls. Scale is $299 per month with 3,738 included call minutes, 30 concurrent calls, and three workspace seats. Business is $990 per month with 12,375 included call minutes, 40 concurrent calls, 10 workspace seats, and 10 professional voice clones. Enterprise gates elevated concurrency limits, custom terms, DPA/SLA assurance, BAAs for HIPAA customers, custom SSO, more seats and voices, scale discounts, and priority support. LLM and telephony are billed separately.

At 10,000 included minutes, Business covers the volume for $990 per month before separate LLM and telephony charges. Starter would not fit that volume without overage math.

Pros

• Voice quality, multilingual speech, transcription, voice cloning, and conversational audio are deep product strengths.
• Free and Starter plans let teams test agent quality before moving into larger included-minute tiers.
• Concurrency scales clearly from four calls on Free to 40 calls on Business.
• Monitoring, workflows, knowledge bases, RAG, text, voice, and telephony options make it more than a speech-only layer.

Cons

• LLM and telephony are billed separately, so the plan price is not the full cost of a working phone agent.
• Revenue teams still need surrounding workflow for CRM updates, fallback messages, QA, and human handoff.
• Business pricing is a meaningful jump for teams that mainly want a lightweight phone agent.
• Product teams will get more value from ElevenAgents than RevOps teams that need lifecycle revenue automation out of the box.

Summary

ElevenAgents by ElevenLabs is the Retell AI alternative to test when the voice experience itself is the product constraint. Outcraft fits when the agent needs to move the buyer into the next revenue action across calls, SMS, email, and WhatsApp.

How to choose the right Retell AI alternative

Use this fit map before you book demos:

• Choose Outcraft AI for connected revenue workflows where the agent needs calls, SMS, email, WhatsApp, CRM context, owner routing, and outcome tracking.
• Choose Retell AI when the current platform already gives you the builder, SMS/chat expansion, testing tools, 20 included concurrent calls, and pay-as-you-go economics you need.
• Choose Vapi for engineering-led voice infrastructure when provider control, API flexibility, and bring-your-own-key economics matter most.
• Choose Bland AI for call-heavy teams that want bundled AI rates, batch calling, and high-volume phone-agent operations.
• Choose Synthflow for enterprise teams that want a managed AI voice rollout with scoped implementation and support.
• Choose ElevenAgents by ElevenLabs for product teams that need voice quality, multilingual speech, configurable agents, monitoring, and a strong audio API layer.

What changes once the voice agent owns the next step

The old model treats the call as the finish line. The better model treats the call as one point in a connected revenue workflow.

A cart was abandoned thirty minutes ago. Intent is present, and the friction is unknown. Send an SMS with the cart link, then place a call if there is no reply in two hours. A payment fails. This is involuntary churn, not a decision to leave. Email the card-update link, follow up with WhatsApp at twenty-four hours, call at seventy-two.

That is where the moment, channel, and outcome matter. Voice may be the fastest channel, but more channels do not fix a broken workflow. The workflow has to decide when the call should happen, what happens after no answer, when a human owner steps in, and how the CRM learns from the result.

We covered the broader revenue-automation setup in our omnichannel marketing automation post.

Limitations to call out before you pick a platform

Voice AI needs pilot validation. Test real customer objections, background noise, accents, interruptions, voicemail behavior, consent handling, transfer rules, supported languages, batch calling, QA review, and escalation notes before you roll out a large workflow.

Outcraft is not the cheapest path for a single phone prototype. Public pricing is not available; the platform is heavier than a single-channel AI phone agent tool, and teams with messy CRM or commerce data may need setup work before an autonomous revenue engine can act cleanly.

Retell and Vapi ask more of engineering. Bland’s bundled minute can be simpler, but call volume still needs governance. Synthflow’s enterprise contract can make sense for mature buyers and feel too heavy for small teams. ElevenAgents by ElevenLabs is excellent for conversational voice quality, but you still need the workflow layer around the conversation.

We wrote a full guide on AI-powered customer engagement software for teams deciding whether this belongs in RevOps, sales, support, or lifecycle marketing.

Use Outcraft to turn AI voice calls into revenue follow-up

Retell deserves credit for giving builders a practical way to create AI phone, chat, and SMS agents. Vapi gives engineers control, Bland AI suits call volume, Synthflow packages enterprise rollout, and ElevenAgents by ElevenLabs raises the bar on conversational voice quality.

What those tools will not do by themselves is own the full motion around the call: the revenue moment, the channel decision, the customer context, the human handoff, and the measurable outcome.

Outcraft is for the team that wants the AI voice agent to become part of a connected revenue workflow:

• A demo request gets a fast call and an SMS booking fallback.
• A failed payment gets email, WhatsApp, and call recovery in sequence.
• An after-hours inbound call gets handled autonomously and routed with context.
• A churn signal gets sent to the named owner before renewal risk becomes visible.

If your team is still stitching this together manually across calls, SMS, email, and WhatsApp, Outcraft can help you turn the revenue moment into an autonomous follow-up workflow your team can measure and improve.