AI voice agents that answer, qualify and book every call
AI receptionists and call agents that pick up every call, understand what the caller needs, book or resolve it, and log everything in your CRM.
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What is an AI voice agent?
An AI voice agent is software that holds a real phone conversation. It turns speech into text, uses a large language model to understand the caller and decide what to do, takes actions such as booking, looking up an order or updating the CRM, and replies in a natural voice. It can answer inbound calls as an AI receptionist or make outbound calls, and it transfers to a person when needed.
Every missed call is a lead or a customer you may not get back. An AI voice agent answers instantly, day or night, in a natural voice. It understands what the caller wants, asks the right questions, books the appointment or resolves the request in your systems, and hands over to a person when it should.
We build voice agents on your own phone line, calendar and CRM, with call recordings, transcripts and summaries for your team, consent rules for outbound calling, and a working agent on your real calls in under 30 days.
Our offerings
Our senior teams combine proven frameworks, reusable accelerators and hands-on engineering to deliver results at speed and scale.
Get in touch- 01
AI receptionist
Answers your main line, handles FAQs, takes messages, books appointments and routes calls to the right person.
- 02
AI call center agents
Resolve common inbound calls end to end, such as order status, rescheduling and account questions, with warm transfer for the rest.
- 03
Outbound AI calls
Call back web leads, confirm appointments, run reminders and follow-ups, within consent and calling-hour rules (TCPA, PECR).
- 04
AI appointment setter
Qualifies callers with your script and books meetings, viewings or jobs straight into your calendar or job software.
- 05
CRM & calendar integration
Writes transcripts, summaries, outcomes and next steps to HubSpot, Salesforce or your own systems after every call.
- 06
Conversational IVR replacement
Replaces press-1 menus with a voice agent that understands plain speech and can actually take action.
BufferSol's AI Voice Agents delivery approach
- 01
Call mapping
We review your call types, recordings and scripts, and pick the calls the agent should own first.
- 02
Prototype in two weeks
A working voice agent on a test number, connected to your calendar and CRM, with test calls scored for accuracy and tone.
- 03
Pilot on real calls
Live on part of your traffic with warm transfer to your team, monitoring and daily tuning, within 30 days.
- 04
Scale & improve
More call types, outbound campaigns and languages, with dashboards for answer rate, bookings and transfers.
Industry-specific AI Voice Agents solutions
Healthcare & clinics
Appointment booking, rescheduling, reminders and intake questions, with privacy-aware data handling.
Real estate & home services
Answer every enquiry, qualify budget and timing, and book viewings or jobs, even after hours.
E-commerce & retail
Order status, returns and delivery questions handled by phone, with the same rules as your helpdesk.
Professional services
Client intake for law, accounting and agencies: capture details, check fit and book consultations.
Why BufferSol for AI Voice Agents?
Every call answered
Calls are picked up instantly, after hours, at weekends and during peaks, so leads stop going to voicemail.
Booked while intent is high
Callers are qualified and booked straight into your calendar during the call, with SMS or email confirmations.
Clear call records
Every call leaves a transcript, a summary and structured fields in your CRM, and hot leads alert your team at once.
Secure, responsible delivery
Least-privilege access, audit logs and security reviews on every release.
100% IP ownership
You own the code, designs and data. Documented handover, no lock-in.
Senior team, no hand-offs
The engineers who scope your project are the ones who build it.
Technology we use
- OpenAI Realtime
- Twilio
- LiveKit
- Deepgram
- ElevenLabs
- Claude
- Node.js
- Python
- HubSpot API
- PostgreSQL
Enterprise-ready by default
Security, governance and responsible AI
Autonomous systems only create value when you can trust them. Every agent and platform we ship includes the controls your security, legal and compliance teams expect.
Security by design
Least-privilege access, encrypted data in transit and at rest, secrets in managed vaults and OWASP-aligned code reviews.
Human-in-the-loop AI
Approval gates for high-impact actions, confidence thresholds and clean hand-offs to your team when an agent is unsure.
Guardrails & audit trails
Every agent decision, tool call and data access is logged and traceable, so compliance teams can review what happened and why.
Evaluation & monitoring
Test suites for prompts and models, cost and latency dashboards, and drift alerts before quality slips in production.
Data privacy & compliance
GDPR-ready data handling, NDAs as standard, data residency options and HIPAA-conscious builds for healthcare.
You own everything
Full IP transfer, source code in your repositories and documentation your in-house team can run with.
Related case studies
AI Voice Agents solutions we have designed, built and put into production.
How we engage
Engagement models built around outcomes
Start small, prove value fast and scale what works, with transparent pricing at every stage.
2–3 weeks
AI Discovery Sprint
Map your processes, rank automation opportunities by ROI and leave with a working prototype and a costed roadmap.
- ✓Process & data audit
- ✓Use-case scoring
- ✓Clickable or working prototype
- ✓Fixed price
6–16 weeks
Build & Launch
A dedicated squad designs, builds, tests and launches your agent, workflow or product, with weekly demos and a fixed scope.
- ✓Product, design & engineering
- ✓Weekly demos
- ✓QA, security & evaluation
- ✓Production launch
Monthly
Run & Scale
We operate, monitor and improve what we built: model updates, new automations, SLAs and 24/7 support.
- ✓Monitoring & evaluation
- ✓Continuous improvement
- ✓SLA-backed support
- ✓Dedicated team option
How long does it take to launch an AI voice agent?
You get a working voice agent on your real calls in under 30 days: about two weeks to a prototype on a test number, then a pilot on part of your traffic with warm transfer to your team. Full rollout across call types, with every integration, typically takes 4 to 8 weeks.
Will callers know they are talking to AI?
We recommend the agent says it is an AI assistant at the start of the call, and in some places and for some outbound calls the law requires it. Natural, low-latency speech and good interruption handling mean callers can still speak normally and get things done quickly.
Can an AI voice agent make outbound calls?
Yes, for call-backs, reminders, confirmations and follow-ups. Outbound calling must follow consent and calling-hour rules, such as the TCPA in the US and PECR in the UK, so we build consent checks, opt-outs and call logs into the agent from the start.
What happens when the agent cannot help?
It transfers the call to a person with a short summary, so the caller does not have to repeat themselves, or takes a message and creates a task when nobody is available. You decide which call types and situations always go to a human.
Does it work with our phone system and CRM?
Usually yes. Voice agents connect through telephony providers such as Twilio or SIP to your existing numbers, and to calendars, CRMs and helpdesks through their APIs. We check your systems during call mapping and confirm the integration plan before building.
How much does an AI voice agent cost?
It depends on call volume, the number of call types and integrations. Running costs are mostly per minute (telephony, speech and model usage). We scope a fixed-price prototype first, so you see it working on your calls before committing to a full build.
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