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Ultravox alternatives
Ultravox is a voice agent platform, with a free entry tier. These 15 vendors are in the same product group and share the most published facts with it.
2 of the alternatives publish a paid monthly plan, the lowest being OpenMic at $29/month.
Price comparison
| # | Vendor | Starts at | Per-min | Included | Free trial | HIPAA | Why it's here |
|---|---|---|---|---|---|---|---|
| — | Ultravox (the one you're replacing) | Free | $0.05 | — | Not stated | Not stated | |
| 1 | Bland AI Voice agent platform · site | Free | $0.14 | — | Free plan | BAA available | |
| 2 | Dasha Voice agent platform · site | Free | $0.08 | — | Free plan | Not stated | |
| 3 | Famulor Voice agent platform · site | Free | — | — | No credit card | BAA available | |
| 4 | Floatbot Voice agent platform · site | $99/mo | — | 500 min | 14-day free trial, no credit card | Claims HIPAA | |
| 5 | LiveKit Agents Voice agent platform · site | Free | $0.01 | — | Free plan | BAA available | |
| 6 | OpenMic Voice agent platform · site | $29/mo | — | — | Free trial | Not stated | |
| 7 | Retell AI Voice agent platform · site | Free | $0.07 | — | $10 free credits | BAA available | |
| 8 | Vapi Voice agent platform · site | Free | $0.05 | — | $5 free credits | BAA available | |
| 9 | ElevenLabs Agents Voice agent platform · site | Not published | — | — | Not stated | BAA available | |
| 10 | Synthflow Voice agent platform · site | Quote | — | — | Not stated | Not stated | |
| 11 | Thoughtly Voice agent platform · site | Not published | — | — | Not stated | BAA available | |
| 12 | Callin.io Voice agent platform · site | Free | $0.16 | — | Free trial | Not stated | |
| 13 | Cartesia Managed Agents Voice agent platform · site | Free | $0.06 | — | Free plan | Claims HIPAA | |
| 14 | Millis AI Voice agent platform · site | $0.02/min | $0.02 | — | Not stated | Not stated | |
| 15 | Tabbly Voice agent platform · site | Free | $0.05 | — | No credit card to start | Not stated |
Each alternative in one line
- Bland AI: Developer voice AI platform with per-minute talk-time pricing, Conversational Pathways and self-hosting options. Bland AI alternatives
- Dasha: Developer voice-AI platform billed per second with 1,000 free minutes, any LLM and bring-your-own carrier. Dasha alternatives
- Famulor: AI voice agent platform with per-minute pricing in euros, 120 languages and a BAA option. Famulor alternatives
- Floatbot: No-code voicebot and chatbot builder for inbound and outbound calls, priced by voice minutes or chat sessions. Floatbot alternatives
- LiveKit Agents: Open-source agent framework plus LiveKit Cloud for deploying voice agents, with per-minute agent sessions and built-in telephony. LiveKit Agents alternatives
- OpenMic: No-code voice agent builder with monthly plans; Business includes 1,000 minutes. OpenMic alternatives
- Retell AI: Pay-as-you-go voice agent platform for developers; component pricing for infra, voices, LLM and telephony. Retell AI alternatives
- Vapi: Developer platform for voice agents: $0.05/min hosting plus pass-through transcriber, model, voice and telephony. Vapi alternatives
- ElevenLabs Agents: Voice and chat agent platform from ElevenLabs with 90+ languages and telephony integrations. ElevenLabs Agents alternatives
- Synthflow: Enterprise voice AI platform for building phone agents with native telephony, SIP and contact-center integrations. Synthflow alternatives
- Thoughtly: Voice AI agent platform with Basic, Business and Enterprise plans and a BAA for healthcare. Thoughtly alternatives
- Callin.io: White-label AI voice platform for agencies at a flat per-minute rate with no monthly fee. Callin.io alternatives
- Cartesia Managed Agents: Voice agent builder from the Sonic TTS maker: $0.06 per call minute, with prepaid agent dollars on every plan. Cartesia Managed Agents alternatives
- Millis AI: Low-latency voice agent platform from $0.02/min for no-code or code builders, with numbers in 100+ countries. Millis AI alternatives
- Tabbly: Pay-as-you-go AI voice agent platform billed by the second, 50+ languages. Tabbly alternatives
Head-to-head comparisons
Retell AI vs UltravoxBland AI vs VapiBland AI vs Retell AIBland AI vs SynthflowBland AI vs Smith.ai AI ReceptionistBland AI vs PolyAIBland AI vs ElevenLabs AgentsBland AI vs SierraLiveKit Agents vs VapiLiveKit Agents vs Retell AIRetell AI vs VapiRetell AI vs SynthflowRetell AI vs VoiceflowElevenLabs Agents vs Retell AIPolyAI vs Retell AI
How we pick alternatives: same product group (voice platforms), at least one shared industry when Ultravox names any, then ranked by shared industries, stated features and integrations. Only facts from vendor sites; unknown values are left blank. Methodology.