20 Estera alternatives
Estera: AI receptionist that answers every call and WhatsApp message for local service businesses, 24/7. 20 apps do similar work, most sharing Voice Agents, Customer Support and Telephony, ranked by how much they have in common with Estera.
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Build, test, and monitor production phone agents — with the testing and analytics that call centres actually require.
Also: Customer Support, Telephony, Voice Agents
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Build, test and ship customer-facing AI agents on a visual canvas, with evaluation runs and per-step logs rather than vibes.
Also: Customer Support, Voice Agents
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TruGen AI
A face-to-face video AI sales rep that meets website visitors live, qualifies them, demos the product and books the meeting.
Also: Customer Support, Voice Agents
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AI concierge agents for support at scale, with a supervision layer that turns transcripts into improvements.
Also: Customer Support, Voice Agents
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Bland AI
Enterprise phone agents on self-hosted models, tuned for human-sounding delivery at very large call volumes.
Also: Telephony, Voice Agents
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A developer platform for voice agents that make and take phone calls, with sub-second turn latency.
Also: Telephony, Voice Agents
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Open-source voice AI platform you can self-host — a visual workflow builder, bring-your-own STT/LLM/TTS models, telephony, and no per-minute platform lock-in.
Also: Telephony, Voice Agents
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Interface, Inc.
AI receptionist and second work number for local service businesses — answers calls 24/7, transcribes everything, and turns each conversation into summaries and next steps.
Also: Telephony, Voice Agents
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Autophonix, LLC
AI voice agents for inbound and outbound phone calls, priced from 2¢ per minute, with 40+ languages, native SIP trunking and HIPAA/GDPR compliance.
Also: Telephony, Voice Agents
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Developer platform for AI agents on Apple's own channels — programmable iMessage at scale, plus video agents that answer and place FaceTime calls in a few lines of code.
Also: Telephony, Voice Agents
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Voice and text AI agents that run multi-week outbound calling campaigns for home-service businesses.
Also: Telephony, Voice Agents
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OpenClaw Foundation
Open-source personal AI assistant that runs on your own machine and answers from WhatsApp, Telegram, Slack, iMessage and 25 other chat apps.
Also: WhatsApp
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Cloud-hosted long-horizon AI agents: pick a harness like Claude Code or Codex, pick a model, and reach the same agent from Slack, WhatsApp, iMessage, the web or a CLI.
Also: WhatsApp
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Meta
Meta's free assistant built on Llama, available on the web and woven into WhatsApp, Instagram, and Messenger.
Also: WhatsApp
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Agent infrastructure for messaging: describe one AI agent and run it on iMessage, WhatsApp, Telegram, Slack, SMS and email.
Also: Customer Support
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Puts live chat, help center, surveys, a feedback board, roadmap and changelog on one customer record, so you learn what to build and can tell the people who asked.
Also: Customer Support
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Intercom
Intercom's AI support agent, resolving a majority of customer conversations end to end, priced per resolution.
Also: Customer Support
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Conversational AI agents for customer experience, built per company and accountable for real outcomes.
Also: Customer Support
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Instantly provide support with your custom AI agent
Also: Customer Support
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HubSpot
The complete AI solution that’s easy to use, fast to add value, and unifies teams and data throughout your business
Also: Customer Support