本番環境向け音声AIエージェントインフラ — スケール可能なインバウンド、アウトバウンド、IVR代替AIエージェントを構築できます。
音声ツール利用メモリ
Retell AI vs Vapiwhich AI support agent should you pick in 2026?
Production voice agent platform — LLM-native phone agents with low-latency streaming and per-minute pricing.
VoiceTool useMemory
Retell AI vs Vapi — specs
| Spec | Retell AI | Vapi |
|---|---|---|
| Agent Rank | 73 / 100 (A) | 70 / 100 (B) |
| Autonomy | Autonomous | Autonomous |
| Pricing | Pay per task · Free tier | Pay per task · Free tier |
| Open source | No | No |
| Capabilities | Voice, Tool use, Memory | Voice, Tool use, Memory |
| Integrations | 3 apps | 2 apps |
| Verified | Verified | Verified |
| Released | Mar 2025 | Feb 2025 |
Agent Rank breakdown
Retell AI
Agent Rank
73/ 100
- 自律性
- 9
- 機能
- 6
- 連携
- 4
- 料金
- 9
- 完成度
- 6
- 検証性
- 10
自律性、機能、連携、料金、成熟度、編集部の検証を基に自動算出。デプロイごとに更新されます。 どのように算出されているか?
Vapi
Agent Rank
70/ 100
- 自律性
- 9
- 機能
- 6
- 連携
- 2
- 料金
- 9
- 完成度
- 6
- 検証性
- 10
自律性、機能、連携、料金、成熟度、編集部の検証を基に自動算出。デプロイごとに更新されます。 どのように算出されているか?
Pros & cons
Retell AI
メリット
- +Lowest per-minute pricing among production voice agent platforms
- +Strong streaming latency (~300ms) competitive with ElevenLabs
- +Per-minute pricing easier to forecast than per-seat
デメリット
- −Less polished out-of-the-box than Synthflow for non-technical buyers
- −Documentation and tooling still maturing vs ElevenLabs
- −Voice quality varies by model selection
Vapi
メリット
- +Most developer-friendly voice agent in 2026 — SDK-first, well documented
- +BYO model gives full cost + behavior control
- +Pay-as-you-go makes prototyping nearly free
デメリット
- −You build the conversation logic — not a turnkey product
- −Voice quality depends heavily on which provider you wire in
- −Less polished than Parloa for contact-center deployments
Pricing
Retell AI
Pay-as-you-go
無料
Developers
- +~$0.07/min
- +Production-ready API
おすすめ
Scale
カスタム
High-volume voice ops
- +Volume discounts
- +Dedicated infrastructure
- +Custom models
Vapi
おすすめ
Pay-as-you-go
無料
Developers
- +$0.05/min base
- +BYO LLM provider
- +Full SDK + dashboard
Enterprise
カスタム
Production at scale
- +Volume discounts
- +Dedicated infra option
- +SLA + support
Which one should you pick?
Retell AI
Pick Retell AI if its specific capabilities (Voice, Tool use) match what you need.
Try Retell AI →Affiliate links. We may earn a commission at no extra cost to you.
Frequently asked
Should I pick Retell AI or Vapi in 2026?+
Pick Retell AI if its specific capabilities (Voice, Tool use) match what you need. Pick Vapi if its specific capabilities (Voice, Tool use) match what you need. Most working teams running both can use Retell AI for primary work and Vapi for the workflows where its specific strengths matter.
What's the price difference between Retell AI and Vapi?+
Both Retell AI and Vapi start in the same pricing range (Pay per task · Free tier vs Pay per task · Free tier). Total cost of ownership depends on your team size and volume — see the TCO calculator for your specific math.
Which is more autonomous, Retell AI or Vapi?+
Both Retell AI and Vapi are Autonomous agents — neither has a meaningful autonomy advantage over the other. The decision should hinge on capabilities and pricing instead.
Readers comparing Retell AI and Vapi also picked
Adjacent agents in the same category with overlapping capabilities — worth a side-by-side glance before you commit.
Conversational Agents を備えたAI音声プラットフォーム — プロダクションレベルの音声クローニング、TTS、および音声エージェント。
音声ツール利用メモリDemo · hover to playコールセンター向けエンタープライズ音声アシスタント — 自然な会話で顧客対応を完結。
音声ツール利用メモリRAGDemo · hover to play
See more alternatives: alternatives to Retell AI · alternatives to Vapi
Want the real monthly cost at your volume? Run the TCO calculator →
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