The AI receptionist platform
Your next receptionist
isn’t human.
OnCallClerk agents are superhuman. They answer at 2am. They never get sick. They cost $29 a month.
Set up in an afternoon. Cancel anytime. You only pay for calls we answer.
From signup to live calls in one afternoon
Three steps. No code. No phone engineers. Just a receptionist that shows up every time.
Step 1 · Set it up
Up and running in minutes
A guided wizard walks you through industry, voice, and call handling. No developers, no prompt writing, no phone systems to configure.
- Industry templates with pricing and answers pre-filled
- 30+ natural voices, preview with one click
- Smart defaults for hours, escalation, and forwarding
Setup · Wizard
Set up your agent.
Takes about a minute. You can change anything later.
What kind of business is this for?
We'll pre-fill pricing and answers for your industry.
Step 2 · Connect a number
Your own phone number, instantly
Pick a local or toll-free number in seconds, or forward your existing business line. Callers keep dialing the number they already know.
- Local numbers in every area code
- Toll-free and port-your-own options
- Call forwarding in one click
Setup · Phone number
Pick a phone number.
Claim a local US number instantly. You can change it later.
Step 3 · Answer every call
Your business, 24/7
Your AI receptionist answers instantly, holds a natural conversation, captures the details that matter, and sends you a clean summary.
- Real-time transcripts and call summaries
- Books appointments straight into your calendar
- Instant alerts for urgent calls
Tuned to your trade
Industry-specific scripts, vocabulary, and urgency rules — so callers feel like they’re talking to someone who knows the business.
After-hours emergencies are where the money is.
Industry data, Q4 2025
OnCallClerk triages urgency in seconds — burst pipes get routed to the on-call tech, slow drains get booked for tomorrow.
18 industries supported. See the full list.
Tuned to your trade
Industry-specific scripts, vocabulary, and urgency rules — so callers feel like they’re talking to someone who knows the business.
Industry
Plumbing
After-hours emergencies are where the money is.
Industry data, Q4 2025
OnCallClerk triages urgency in seconds — burst pipes get routed to the on-call tech, slow drains get booked for tomorrow.
See plumbing agentIndustry
HVAC
No heat in January is a same-day decision.
HVAC industry report, 2024
Captures equipment model and symptom, checks your dispatch window, and books the right tech — before the caller dials the next number on Google.
See hvac agentIndustry
Real estate agents
The first agent to call back usually wins.
Lead Response Management Study, 2011
Picks up instantly, qualifies the buyer’s timeline and budget, and books the showing or callback while the lead is still warm.
See real estate agents agentIndustry
Property management
Leaks and lockouts don’t wait for office hours.
NMHC / Grace Hill Renter Preferences Report, 2024
Triages emergency maintenance, schedules property tours, and captures applicant details — so your team isn’t fielding pager calls at midnight.
See property management agent18 industries supported. See the full list.
People are expensive.
We're not anti-people. But the math on a full-time receptionist is hard for most small businesses. And an answering service still misses the calls that matter most.
Receptionist cost based on US median salary ($42k) + employer taxes & benefits. Your numbers may vary. The gap doesn't.
Pay for what works.
No setup fees. No contracts. Cancel anytime. The trial is fourteen days — long enough to see whether your phone actually rings less.
All plans include a 14-day free trial. You only pay for calls we actually answer.
Calculate your savingsA platform, not just a product.
Every feature on this page is exposed over an API. Ship AI phone agents into your own product, or resell them to your clients under your own brand.
REST API
Create agents, provision numbers, fetch transcripts, and stream call events. Everything the dashboard does, your code can do.
Read the API referenceTypeScript SDK
Typed client with first-class support for Node, Next.js, and the edge. Call webhooks, subscribe to call events, wire into your stack in a few lines.
Browse the SDK docsWhite-label & resell
Run OnCallClerk under your own brand. Manage client numbers from one dashboard. Keep the margin between what you pay us and what you charge them.
Talk to usFind yours
Agents pre-tuned to the questions, vocabulary, and urgency of your industry.
From the blog
Guide
How to Hire an AI Receptionist
A practical guide to choosing the right AI receptionist for your business.
Guide
AI Receptionist Cost: Pricing & Comparison Guide
AI receptionist cost vs in-house staff, virtual receptionists, and answering services — with real numbers and ROI.
Guide
How to Start an AI Call Center
Step-by-step guide to building an AI-powered call center from scratch.
Ready to never miss
another call?
Join thousands of businesses using OnCallClerk to answer every call, 24 hours a day.
No credit card required · 5-minute setup · Cancel anytime