Voice AI platform for developers
The fastest Voice AI agents
#1 on voicebenchmark.ai. For developers shipping production voice AI at scale.
1,000 free minutes. No credit card required.
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Dasha answers first. 108 ms ahead of Telnyx, the next-best.
Median turn latency on voicebenchmark.ai: Dasha 925 ms, Telnyx 1,033 ms, OpenAI Realtime API 1,059 ms, Retell 1,059 ms, ElevenLabs 1,874 ms, VAPI 2,744 ms.
calls powered by Dasha
Live count. Verify it at app.us.dasha.ai/api/v1/misc/stats/aggregated/count
For AI agents
- Ask
- GET /ask?q=your+question
- Card
- /.well-known/agent-card.json
- Index
- /llms.txt
How you build
Ship fast. Keep full control.
REST API to start. Full control when you need it. One platform.
REST API
Built to ship fast
No complex SDKs, no learning curve. If you can make an API call, you can ship. Days to production, not weeks.
- Ship in days
- Simple REST API
- Production-ready
Programmatic control
Full control when you need it
Full programmatic control when you need it. Go beyond REST API limitations.
- Full control over conversation flow
- Complex multi-turn workflows
- Predictable behavior
Platform
Platform capabilities
Languages
Mid-call language switching
Customer switches to Spanish mid-sentence? The agent adapts instantly, with no restart.
Models
Any LLM, switched mid-conversation
GPT for creativity, Claude for reasoning, your fine-tuned model for domain tasks, all in one call.
Telephony
Any SIP/VoIP provider
Connect to your infrastructure: Twilio, Vonage, your PBX. No forced telephony migrations.
Control
Deterministic flow control
Exact flows, handled edge cases and predictable behavior, even when the caller goes off-script.
Handoff
Warm transfers to humans
The person taking over is briefed on everything discussed before the transfer.
Reliability
Automatic failover
If an LLM provider goes down, calls switch to another one and keep running.
#1 latency on voicebenchmark.ai
Measurably the fastest voice AI platform. Sub-second response = natural conversation, not awkward pauses.
10,000+ concurrent calls
Most platforms demo well but fail at scale. This is actual production capacity, not marketing promises.
30+ languages
Global businesses need global support. Deploy worldwide without separate systems per market.
Mid-call language switching
Customer switches to Spanish mid-sentence? The agent adapts instantly, with no restart.
Use any LLM (GPT, Claude, Gemini, etc.)
No vendor lock-in. GPT-5 launches tomorrow? Switch immediately. Your investment is future-proof.
Any LLM, switched mid-conversation
GPT for creativity, Claude for reasoning, your fine-tuned model for domain tasks, all in one call.
BYOC (Bring Your Own Carrier)
Switching phone numbers is painful. Add AI without disrupting existing telephony. Seamless continuity.
Any SIP/VoIP provider
Connect to your infrastructure: Twilio, Vonage, your PBX. No forced telephony migrations.
REST API
No complex SDKs, no learning curve. If you can make an API call, you can ship. Days to production, not weeks.
Full programmatic control
Full programmatic control when you need it. Go beyond REST API limitations.
Deterministic flow control
Exact flows, handled edge cases and predictable behavior, even when the caller goes off-script.
Voice cloning
Clone any voice in minutes. Match your CSR's voice, create brand voices, build regional accents. Your AI sounds like YOUR brand.
Warm transfers to humans
The person taking over is briefed on everything discussed before the transfer.
Voicemail detection
In high-volume calling, wasted voicemail time = wasted money. High accuracy means focus on real conversations.
Real-time transcription
Search across calls, review what was said, train teams on successful patterns. Turn phone calls into searchable data.
CRM integrations (Salesforce, HubSpot)
Pull customer data into conversations, push results back automatically. Your AI becomes extension of existing systems.
Zapier integration
Connect to 5,000+ apps instantly. Trigger workflows without custom integration code.
Automatic failover
If an LLM provider goes down, calls switch to another one and keep running.
99.99% uptime target
Contractual commitment, not hopeful promises. Enterprises require this for vendor approval.
Interruption handling
Customers interrupt. Your AI pauses, acknowledges, adapts — like a human would. No talking over each other.
Custom voice creation
Match existing CSR voices, create unique brand voices, build region-specific accents. Not generic TTS.
Stabilized LLM function calls
LLMs sometimes don't trigger function calls. We fixed that. Never lose leads to missed CRM writes.
Multi-provider load balancing
Not just failover — actively balance for best latency/cost. Optimize continuously.
A/B testing built-in
Test prompts/scripts against each other with real calls. Make data-driven decisions, not guesses.
Event tracking & funnel building
Tag conversation points, see exactly where calls drop off. Instrument conversations like you instrument code.
Automatic call tagging/disposition
Auto-categorize outcomes and pipe directly to CRM. Manual tagging doesn't scale.
Advanced call queuing
Not just "call now" — queue for optimal timing. Respect business rules, execute at right moment.
Version comparison testing
Compare old vs new app behavior before deploying. Catch regressions before customers do.
Dynamic field insertion in prompts
Pull CRM data into prompts in real-time. Every conversation personalized with latest customer info.
Memory management
Control what bot remembers/forgets mid-conversation. Fine-grained control over AI context.
Unlimited voice clones
Not 1-2 voices, unlimited. Different voices for departments, regions, campaigns, brands.
Dynamic VoIP configuration
Configure different SIP trunks per customer, region, or campaign programmatically via API. Essential for SaaS platforms.
Telephony settings control
Set simultaneous line limits per app. Manage capacity precisely, prevent congestion.
Omnichannel
Voice + SMS + Chat, not just phone. Meet customers on whatever channel they prefer.
White-label ready
Resell as your own product. We stay behind scenes. No competing with you in your market.
Smart call scheduling
Don't just blast calls — schedule for optimal timing. Higher answer rates without manual optimization.
Natural turn-taking
Know when to speak, when to listen, when to wait. No robotic patterns. Feels like talking to a person.
Smart backchanneling
AI inserts natural "okay," "I see," "got it" — keeps conversation flowing, customer feels heard.
Context awareness
AI remembers everything discussed, never asks customers to repeat themselves.
Flexible transfer options
AI briefs agent privately first, or real-time three-way intro. Choose what fits your workflow.
Inbound & outbound optimization
Handle customer support and sales campaigns equally well. Same platform, both directions.
Sentiment analysis
Detect customer frustration before they hang up. Emotional intelligence at scale.
Call recordings
Review, analyze, train, comply. Essential for QA, disputes, continuous improvement.
Database connectivity
Connect directly to databases. Pull/push data in real-time during calls. Maximum flexibility.
Webhooks
Real-time event notifications. Know instantly when calls complete, transfers happen, custom events fire.
Real-time logs
Stream logs as calls happen. Debug live issues, don't wait for call to end.
On-premise deployment
For enterprises requiring data on their infrastructure. Full control over data and systems.
Role-based access control
Access is granted based on responsibility level and permitted actions, ensuring each user can only perform operations aligned with their scope. This is essential for enterprise-grade security.
Regional provider selection
Optimize latency by choosing providers per region. Better quality where it matters.
Timezone-aware scheduling
Never call customers at 3 AM. Appropriate call times automatically.
Dedicated support team
Partner invested in your success, not ticket queue. Help from setup through optimization.
Battle-tested platform
Mature, stable, proven in real-world production — not just impressive demos.
Millions of production calls
Not "could handle millions" — HAVE handled millions. Actual enterprise workloads.
Proactive LLM enhancement
Dedicated team fixing LLM limitations. Pauses, missed functions? Already solved.
Knowledge Base (RAG)
Upload documents, your AI pulls relevant context automatically. No manual prompt stuffing.
Post-call analysis
Extract structured data from conversations — sentiment, entities, custom labels. Automatic insights.
IVR detection
Detect when you've hit an IVR menu, not just voicemail. Handle automated systems intelligently.
Web widgets
Embed chat, voice, and phone interfaces directly on your website. One line of code.
MCP integration
Connect Model Context Protocol servers for extended AI capabilities.
Start webhooks
Validate calls and dynamically configure agents before they start. Pre-call logic.
Agent scheduling
Set weekly availability by day/time. Agents only active during business hours.
Ambient noise control
Add background noise to make calls feel more natural and human.
Speech fillers
Configure "um", "uh" during pauses. Makes AI sound less robotic, more human.
Bulk call scheduling
Enqueue thousands of calls at once with priority and deadline settings.
Full-text search across calls
Elasticsearch-powered search across all call data. Find any conversation instantly.
Cold/warm/HTTP transfers
Multiple transfer types — cold handoff, warm briefing, or HTTP-triggered transfers.
Max call duration limits
Set time limits per call or transfer. Control costs and agent availability.
Concurrency monitoring
Real-time view of active calls vs your limits. Capacity planning.
Voice library
Access pre-built voices from ElevenLabs, Cartesia, plus Dasha voices. Start fast.
WebSocket real-time
Persistent connections for web calls and chats. Low-latency browser integration.
Domain origin validation
Control which websites can use your integrations. Security built-in.
100% backwards compatibility
We never break your code. No deprecation surprises, no forced migrations. Your production app keeps working.
Configurable call routing
Route calls based on region, compliance requirements, or custom business rules via API.
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