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21X alternatives
21X is a voice agent platform, billed from $0.07/min. Its site states: appointment booking, CRM integration. These 15 vendors are in the same product group and share the most published facts with it.
21X does not publish a monthly price. 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 |
|---|---|---|---|---|---|---|---|
| — | 21X (the one you're replacing) | $0.07/min | $0.07 | — | Not stated | Not stated | |
| 1 | ElevenLabs Agents Voice agent platform · site | Not published | — | — | Not stated | BAA available | 2 shared features, 1 shared integration |
| 2 | Dasha Voice agent platform · site | Free | $0.08 | — | Free plan | Not stated | 1 shared feature, 1 shared integration |
| 3 | Famulor Voice agent platform · site | Free | — | — | No credit card | BAA available | 2 shared features |
| 4 | Leaping AI Enterprise voice AI · site | Quote | — | — | Not stated | Not stated | 2 shared features, 1 shared integration |
| 5 | Synthflow Voice agent platform · site | Quote | — | — | Not stated | Not stated | 2 shared features |
| 6 | Thoughtly Voice agent platform · site | Not published | — | — | Not stated | BAA available | 1 shared feature, 1 shared integration |
| 7 | Bland AI Voice agent platform · site | Free | $0.14 | — | Free plan | BAA available | 1 shared feature |
| 8 | Callin.io Voice agent platform · site | Free | $0.16 | — | Free trial | Not stated | 1 shared feature |
| 9 | Floatbot Voice agent platform · site | $99/mo | — | 500 min | 14-day free trial, no credit card | Claims HIPAA | 1 shared feature |
| 10 | LiveKit Agents Voice agent platform · site | Free | $0.01 | — | Free plan | BAA available | 1 shared feature |
| 11 | Millis AI Voice agent platform · site | $0.02/min | $0.02 | — | Not stated | Not stated | 1 shared feature |
| 12 | OpenMic Voice agent platform · site | $29/mo | — | — | Free trial | Not stated | 1 shared feature |
| 13 | Retell AI Voice agent platform · site | Free | $0.07 | — | $10 free credits | BAA available | 1 shared feature |
| 14 | Vonage AI Studio Voice agent platform · site | Free | — | — | Free plan | Not stated | 1 shared feature |
| 15 | Ada Voice Enterprise voice AI · site | Quote | — | — | Not stated | Claims HIPAA | 1 shared feature, 1 shared integration |
Each alternative in one line
- ElevenLabs Agents: Voice and chat agent platform from ElevenLabs with 90+ languages and telephony integrations. ElevenLabs Agents 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
- Leaping AI: Voice AI for call centers with self-improving agents and human handoff. Leaping AI 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
- Bland AI: Developer voice AI platform with per-minute talk-time pricing, Conversational Pathways and self-hosting options. Bland AI alternatives
- Callin.io: White-label AI voice platform for agencies at a flat per-minute rate with no monthly fee. Callin.io 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
- 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
- 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
- Vonage AI Studio: Low-code builder for voice and chat virtual agents on Vonage APIs, with free, advanced and fully managed plans. Vonage AI Studio alternatives
- Ada Voice: AI voice agents for customer service that resolve calls, place outbound calls and hand off into existing contact centers. Ada Voice alternatives
Head-to-head comparisons
ElevenLabs Agents vs VapiElevenLabs Agents vs Retell AIElevenLabs Agents vs SynthflowBland AI vs ElevenLabs AgentsCartesia Managed Agents vs ElevenLabs AgentsSynthflow vs VapiBland AI vs SynthflowRetell AI vs SynthflowSynthflow vs VoiceflowRetell AI vs ThoughtlyBland AI vs VapiBland AI vs Retell AIBland AI vs Smith.ai AI ReceptionistBland AI vs PolyAIBland AI vs Sierra
Lists that include 21X
How we pick alternatives: same product group (voice platforms), at least one shared industry when 21X names any, then ranked by shared industries, stated features and integrations. Only facts from vendor sites; unknown values are left blank. Methodology.