Best Sierra alternatives

Comparison

Tool	Price from	Free plan	Category
Sierra	not listed	?	Customer support & chatbots
Crisp	45 USD/mo	trial	Customer support & chatbots
Retell AI	0.07-0.31 USD/mo	trial	Customer support & chatbots
Voiceflow	not listed	trial	Customer support & chatbots
Tidio	29 USD/mo	yes	Customer support & chatbots
Zendesk AI	19 USD/mo	trial	Customer support & chatbots
AgentDock	39 USD/mo	yes	Customer support & chatbots
DialLink	15 USD/mo	trial	Customer support & chatbots
Botpress	150 USD/yr	yes	Customer support & chatbots

Each alternative in short

1. Crisp

All-in-one AI customer support platform combining shared inbox, chat widget, CRM and AI agents for businesses of any size.

There is a free trial. Free plan forever with website chat widget, 2 seats, shared inbox and mobile apps, but no AI credits included. Every new account gets a 14-day free trial of all features without a card.

2. Retell AI

Platform for building, deploying and managing AI voice agents that handle inbound and outbound phone calls for support, scheduling and lead qualification.

There is a free trial. Pay-as-you-go plan includes $10 in free credits and 20 free concurrent calls.

3. Voiceflow

Enterprise platform for building, launching and scaling chat and voice AI agents for customer support and CX teams.

There is a free trial. Free trial for agencies and partners, no credit card required.

4. Tidio

AI customer service platform with Lyro AI agent that answers customer chats and turns conversations into tracked sales, leads and bookings.

Yes, there is a free plan. Free plan forever, available to start for free. The page does not list its limits in detail.

5. Zendesk AI

AI layer of Zendesk's customer service platform that resolves support requests with AI agents, a Copilot for agents, and automation for support teams.

There is a free trial. A 'Try for free' option is offered. Qualified startups can get up to 2 years of Zendesk free.

6. AgentDock

AI customer engagement platform: one AI employee handles customers on web, email, phone, SMS, Telegram and WhatsApp, escalating to your team when needed.

Yes, there is a free plan. Dock writing tool free forever: unlimited documents, 10 AI writing actions a day, Chrome extension and the full prompt library. Unlimited plan has a 7-day free trial.

7. DialLink

Business phone system combining calls, SMS, WhatsApp and AI voice agents in one platform, aimed at small businesses.

There is a free trial. 7-day free trial of the plans.

8. Botpress

AI agent platform for customer support that resolves complex tickets end-to-end, with human handoff when needed.

Yes, there is a free plan. 100 conversations per month, 3 seats, 3 AI agents, Help Center and community support.

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