Alternatives to Stellar
30 tools that compete with or replace Stellar. Ranked by direct product-type match — not generic category overlap.
Why people look for alternatives to Stellar
The complaints that come up most often in public discussion — reviews, forums and community threads. Not our opinion, and not the vendor's marketing.
- No verified user feedback exists—all claims are unproven.
- Name collision makes finding real reviews nearly impossible.
- Lack of community support channels reported by any user.
- Per-minute pricing could become expensive at high call volumes.
Drawn from 78 mentions across 5 sources · researched Jul 2, 2026.
In fairness: users also consistently praise no-code setup in about ten minutes with pre-built industry knowledge, and covers 16 verticals including hvac, dental, and real estate. A complaint list is not a verdict — see the full picture on the Stellar page.
Synthflow AI
Synthflow AI runs enterprise voice AI agents on its own telephony network for automated phone calls at scale.
ElevenLabs Conversational AI
Build voice and chat agents that hold real conversations in 70+ languages, live in about five minutes.
Synthflow
Enterprise voice AI agents running on Synthflow's own telephony network, from $30,000/year
AgentZee
One no-code platform for AI chatbot, outbound voice calling, WhatsApp broadcast, and sales analytics agents.
SkipCalls
SkipCalls is a 24/7 AI receptionist that answers your existing business line, books jobs, blocks spam, and texts you every call summary for $19.99/mo.
Upfirst
Upfirst is an AI phone receptionist that answers calls 24/7, books appointments into your calendar, and texts you the details.
PolyAI
PolyAI builds enterprise voice AI agents that handle complex customer calls in 40+ languages
EliseAI
Agentic AI for property management and healthcare that answers every lead, resident, and patient 24/7 across SMS, email, chat, and voice.
Voctiv
Voctiv is an omnichannel generative AI platform that handles calls, messages, and appointments for enterprises, SMBs, and solo professionals.
Slang.ai
AI phone answering built only for restaurants — it takes inbound calls, answers guest questions, and books reservations 24/7.
Awaz.ai
No-code AI voice agents that run outbound and inbound phone calls, book meetings, and take call-time actions for you.
Giga
AI voice and chat support agents that chase a metric — resolution rate, escalation rate, or CSAT — not just answer calls.
Inworld
Inworld is a research lab and inference provider for realtime voice AI, offering first-party TTS-2 and STT models plus a zero-markup LLM router for developers
Decagon
Enterprise AI concierge platform for customer support agents that work across chat, voice, and email.
Inworld AI
Inworld AI is a research lab and inference provider for realtime voice — first-party TTS-2 and STT models plus zero-markup routing across 220+ LLMs.
TMate
Millis AI (by TMate Inc.) builds LLM voice agents you can deploy to phone numbers, web, mobile or desktop with claimed 500–600ms latency.
Dograh
Open-source, self-hosted voice AI platform with a visual workflow builder, MCP-native design, and bring-your-own-key model support.
Callab AI
AI voice agents for enterprise contact centers that run on your existing PBX, SBC, and telephony instead of replacing it.
Retape
Resolve is an AI-native CRM built only for debt settlement teams, with six named AI workers automating intake, servicing, and negotiations.
Bland AI
Bland AI runs enterprise voice AI phone agents for regulated calls, with a per-minute rate that bundles LLM, STT, and TTS.
Vapi
Vapi is an API-first platform for building voice AI agents that handle real inbound and outbound phone calls at sub-500ms latency.
Murf AI
Low-latency text-to-speech API and AI voice agents — Murf AI runs real-time phone conversations at 1 cent per minute.
ElevenLabs
ElevenLabs turns text into ultra-realistic AI voice, music, dubbing and conversational voice agents from one credit pool.
Cartesia
Real-time voice AI platform: Sonic-3.6 text-to-speech and Ink-2 speech-to-text models plus Managed Agents for building production voice agents.
Turbo
Turbo is Bland AI's all-in per-minute voice API covering LLM, STT, and TTS in one rate
Converse Now
Voice AI that answers restaurant phone and drive-thru orders with a customizable, branded persona.
Spitch
Modular LLM agentic AI platform that automates enterprise contact centers across voice and text in Swiss-German, German, French and Italian.
Hume AI Octave 2
Emotionally expressive text-to-speech and speech-to-speech voice AI with human-judged evaluation built in.
Smallest.ai
Smallest.ai is a developer-first voice AI platform with TTS, STT, speech-to-speech models, telephony and hosting on one API-first bill.
Vocode
Open-source voice AI framework for building real-time voice agents you host yourself
Frequently asked questions
What are the best alternatives to Stellar?
We currently list 30 alternatives to Stellar: Synthflow AI, ElevenLabs Conversational AI, Synthflow, AgentZee, SkipCalls. Each is ranked by direct product-type match rather than generic category overlap.
How do you choose which Stellar alternatives to show?
Alternatives are ranked by direct product-type match — tools that do the same job — not by shared category tags. Every listed tool is independently re-verified on a continuous cycle.