The 5 best Retell AI alternatives I found in 2025

Voice AI is getting impressively good, and tools like Retell AI have shown us what’s possible with human-like voice agents that respond almost instantly. Plenty of teams use it to automate simple calls, and honestly, it’s a solid tool for getting your feet wet.

But what happens when your support needs get bigger? The cracks in a voice-only solution start to show. Many teams are realizing they need more than just a bot that talks; they need a genuine automation platform that connects to their existing tools, understands all their scattered knowledge, and lets them call the shots.

After trying out the main players, I’ve put together a list of the best Retell AI alternatives that can help you do more than just automate calls and actually improve your whole support system.

What is Retell AI?

So, what is Retell AI, exactly? It’s a platform built for developers to create, test, and launch AI voice agents. Its biggest claim to fame is creating conversations with super low latency (that tiny delay between when someone stops talking and the AI replies), which makes the whole thing feel a lot more natural.

You’ll see it used for things like outbound sales calls, booking appointments, or handling basic customer questions over the phone.

It has some neat features, like integrations with phone systems and the ability to handle interruptions when people talk over it. But, as you’ll see in a few reviews and comparisons, the pricing can get tricky and expensive as you scale, and doing anything truly custom usually means calling in a developer.

Why look for Retell AI alternatives?

While Retell is great for voice-specific jobs, a lot of businesses are looking elsewhere. This isn’t just about saving a few bucks; it’s about finding a tool that actually fits how a modern support team works.

• The pricing gets complicated, fast: Retell’s pay-as-you-go model bills you for the language model, the voice engine, and the phone connection separately. This makes it a headache to predict your monthly costs, which can balloon without warning if your call volume spikes.

• It only does voice: Real customer support happens everywhere: email, live chat, help desk tickets. A voice-only tool just creates another silo, completely cut off from where most of your support conversations are actually happening.

• You need a developer for real customization: You can build simple conversation flows, but if you want an agent that can do things like look up an order number or update a customer’s record, you’re going to need to write code. It’s not exactly a plug-and-play setup for complex tasks.

• It doesn’t play nice with your help desk: Retell is a phone tool first and foremost. It wasn’t designed to deeply connect with help desks like Zendesk or Freshdesk to do things like automate ticket sorting, draft replies for your human agents, or learn from all your past support conversations.

How I evaluated the best Retell AI alternatives

To find the best options, I had to look past just the voice quality. I focused on platforms that solve the real, day-to-day problems of running a support team. Here’s what I was looking for:

1. Easy setup: How fast can someone who isn’t a developer get it up and running and actually see it working?

2. Plays well with others: Does it connect to your current help desk and knowledge sources without a massive migration project?

3. You’re in control: Can you decide exactly what the AI does, what actions it can take, and what its personality should be?

4. Gets smarter over time: How well does it learn from your existing information, like old tickets, internal docs, and help center articles?

5. Straightforward pricing: Is the cost simple and predictable, without weird fees for every ticket it solves?

Quick comparison of the top Retell AI alternatives in 2025

Feature	eesel AI	Bland AI	Synthflow AI	Vapi AI	Strada
Primary Use Case	Unified Support Automation	Developer-First Voice & SMS	No-Code Voice Agents	Developer Voice API	Insurance Voice AI
Go-Live Time	Minutes	Hours to Days	Hours	Hours to Days	Days to Weeks
Help Desk Integration	Native (Zendesk, etc.)	API/Webhooks	API/Webhooks	API/Webhooks	Custom
Trains on Past Tickets	✅ Yes	❌ No	❌ No	❌ No	❌ No
Simulation Mode	✅ Yes (Advanced)	❌ No	❌ No	❌ No	❌ No
Pricing Model	Flat, predictable tiers	Usage-based	Tiered	Usage-based	Enterprise
Self-Serve	✅ Yes	✅ Yes	✅ Yes	✅ Yes	❌ No

The 5 best Retell AI alternatives in 2025

Here are the top five platforms I found that give Retell a run for its money, each with its own vibe.

1. eesel AI

eesel AI is the top choice for teams who want to think bigger than a simple voice bot. It’s a full-on AI automation layer for your entire support operation. Instead of just taking calls, eesel connects directly to your help desk (like Zendesk, Freshdesk, or Intercom) and all your knowledge sources to automatically resolve tickets, draft replies for agents, and power your chatbots.

It’s designed so you can set it up yourself in minutes without ever having to talk to a salesperson. The absolute best part is its ability to train on your past support tickets, letting it automatically pick up your brand’s voice and learn how you solve common problems. You can even run a simulation to see how it would have performed on last week’s tickets before you turn it on, which gives you a ton of confidence before going live.

A screenshot of the eesel AI simulation mode, which is one of the best features among Retell AI alternatives for testing performance before going live.

• What I liked:

  • Go live in minutes: It’s truly self-serve with one-click integrations for major help desks.

  • Brings all your knowledge together: It connects to past tickets, help centers, Confluence, Google Docs, and pretty much anywhere else you store info.

  • Test without risk: The simulation mode is a huge plus, letting you see exactly how it will perform on your real data before you flip the switch.

  • Predictable pricing: Simple monthly fees, so you know exactly what you’re paying. No surprise charges.

  • Total control: You get to fine-tune which tickets get automated and set up custom actions for the AI to take.

• What to watch out for:

  • It isn’t a "telephony-first" platform. Voice is just one part of its much bigger support automation toolkit.

  • There are a lot of customization options, which is great, but it can take a little time to explore everything it can do.

• Pricing: eesel AI has clear, tier-based pricing.

  • Team: $299/month ($239/month if billed annually) for 1,000 AI interactions and 3 bots. This includes training on docs and websites, an AI Copilot for agents, and a Slack integration.

  • Business: $799/month ($639/month if billed annually) for 3,000 AI interactions and unlimited bots. This level adds training on past tickets, the full AI Agent, AI Actions (like auto-triage), and the simulation mode.

  • Custom: You can contact their sales team for plans with unlimited interactions and more advanced setups. They also offer a 7-day free trial.

2. Bland AI

Bland AI is a really solid option for developer teams who want fine-grained control over their AI agents. It’s an API-first platform like Retell, but it goes beyond just voice to include programmable SMS. This makes it a much better fit if you’re trying to build simple workflows that span multiple channels. Their Conversational Pathways feature lets developers map out the conversation logic pretty precisely.

• What I liked:

  • It supports both voice and SMS, which is great for omnichannel use cases.

  • Developers get a ton of control over the conversation logic.

  • Simple, flat-rate pricing per minute.

• What to watch out for:

  • You need to know how to code to build and customize agents.

  • It lacks native help desk integrations, so you’ll be building custom connections with webhooks.

  • There are no simulation features to test performance before you launch.

• Pricing: Bland AI’s official pricing page seems to be down at the moment. But based on its documentation, it runs on a flat-rate model of $0.09 per connected minute. The simplicity is nice, but without a public pricing page, it’s tough to confirm other potential costs.

3. Synthflow AI

Synthflow AI markets itself as a super easy, no-code platform for building AI phone agents. It’s a decent pick for small businesses or teams without developers who just want to get a basic voice bot up and running fast. It comes with pre-built templates for common jobs and has a clean, easy-to-understand interface. While it’s more user-friendly for non-techies than Retell, it has some of the same core limitations.

• What I liked:

  • The no-code setup means pretty much anyone can get started.

  • It has built-in workflows for tasks like booking meetings.

  • It offers more native integrations than Retell does out of the box.

• What to watch out for:

  • It can struggle a bit under a high volume of calls.

  • Customization is fairly limited compared to the developer-first platforms.

  • The pricing is bundled, but the higher tiers can get pretty expensive.

• Pricing: Synthflow’s pricing is tiered and based on how many minutes you use.

  • Starter: $29/month for 50 minutes.

  • Pro: $450/month for 2,000 minutes.

  • Growth: $900/month for 4,000 minutes.

  • Agency: $1,400/month for 6,000 minutes.

  • Enterprise: They offer custom pricing with rates as low as $0.08/minute for very high volume.

4. Vapi AI

Vapi is another platform aimed squarely at developers who need to build voice agents at a massive scale. Its main thing is providing the raw infrastructure to handle millions of calls at once with low latency. It’s made for teams that want to build completely custom voice apps from scratch and have the engineering firepower to do it. Vapi gives you a powerful engine, but you have to build the rest of the car yourself.

• What I liked:

  • It’s built to scale and handle a huge number of concurrent calls.

  • It’s fast, with a big focus on keeping latency low.

  • Offers a ton of flexibility for developers who want to build something unique.

• What to watch out for:

  • There’s a steep learning curve; this is not for beginners.

  • The usage-based pricing can get very expensive if you have a lot of traffic.

  • It provides the building blocks, not a finished solution.

• Pricing: Vapi uses a pretty complex, usage-based model. You pay for Vapi’s hosting fee plus the direct cost of each provider you use for text-to-speech, etc.

  • Vapi Hosting Cost: $0.05 / minute.

  • Model Provider Costs: Billed directly from providers like OpenAI and Deepgram.

  • Concurrency: Your first 10 concurrent lines are free; after that, it’s $10/line/month.

  • This model is flexible, but it also makes it almost impossible to predict your monthly bill.

5. Strada

Strada is a perfect example of where the AI market is going: tools built for one specific industry. While Retell is a generalist tool, Strada is made specifically for insurance companies. It’s been trained on insurance-speak and workflows, from renewing a policy to processing a claim. This makes it an incredibly powerful choice if you’re in that world, but pretty irrelevant for anyone else. It’s a great reminder that sometimes, the best tool is the one that already understands your business.

• What I liked:

  • It’s highly specialized and already knows insurance terminology and processes.

  • It’s built to handle the compliance and regulatory headaches of the industry.

  • It integrates with insurance-specific software.

• What to watch out for:

  • It’s not a fit for any business outside of insurance.

  • There’s no self-serve option; you have to go through a demo and a sales process.

  • The pricing is geared toward enterprise customers and isn’t public.

• Pricing: Strada doesn’t list its prices online. You have to request a demo to get a custom quote, which usually points to a longer sales and onboarding cycle.

How to choose the right Retell AI alternatives: A voice bot vs. a support automation platform

Picking the right tool really boils down to one question: Are you trying to automate phone calls, or are you trying to automate customer support?

If your only goal is to have an AI answer the phone and do one repetitive thing (like appointment reminders), then a dedicated voice bot like Retell or one of its direct competitors might be all you need.

But for most businesses, phone calls are just one small piece of a much bigger puzzle. The real goal is to solve customer problems quickly and well, no matter if they send an email, open a chat, or make a call that turns into a ticket. This is where a support automation platform like eesel AI really makes a difference.

This workflow shows how a full support automation platform, one of the top Retell AI alternatives, handles customer issues across all channels.

Instead of adding another disconnected tool to your stack, a support automation platform plugs right into the core of your operation: your help desk. It pulls together knowledge from all your different sources and automates work right where your team is already living. This approach helps you solve issues faster, makes your human agents smarter, and creates a much smoother customer experience across the board.

Retell AI alternatives: Move beyond the bot

Retell AI is a capable tool that helped show what modern voice AI could do. But in 2025, the best Retell AI alternatives are the ones that understand that customer support is so much more than a phone call. Tools like Bland and Vapi give developers more power, while niche solutions like Strada prove how valuable an industry focus can be.

For most businesses, though, the smartest play is to go with a platform that solves the whole problem. eesel AI stands out because it offers a truly integrated solution that automates support work wherever it happens. By connecting to the tools you already use and learning from your own data, it offers a faster, more controllable, and ultimately more effective way to deliver great support.

Ready to see how a real support automation platform can change your workflow? You can set up and test eesel AI on your own data in just a few minutes.