The best ways to answer calls when you are on a job
If most callers are existing customers, voicemail is fine. If new customers call while you are on a roof or under a sink, use something that answers: a self-serve AI agent such as Rosie or Goodcall if you will set it up yourself, a live service such as Ruby if every caller needs a human, an AI receptionist built for you by Modern Mustard Seed if you want it done and owned, or Avoca if you run a larger shop on ServiceTitan.
Last checked October 5, 2026.
Who each one is best for
- VoicemailBest when almost every caller is an existing customer
- RosieBest for a one-truck business on a tight budget
- GoodcallBest for a small crew that will configure its own AI agent
- Modern Mustard SeedBest for an owner who wants it built, tested and handed over
- RubyBest when every caller needs a live human
- AvocaBest for a multi-truck shop with a dispatch board on ServiceTitan
Voicemail
The greeting and beep that comes with your phone plan.
Strengths
- Usually included with your phone plan.
- Nothing to set up.
Watch for
- A new customer who reaches voicemail can call the next business on the list.
- Every message is a callback you still owe.
PriceUsually included with your phone plan.
Rosie
An AI answering service for small businesses, priced by minutes a month.
Strengths
- The lowest starting price on this list.
- 7-day free trial, cancel anytime.
Watch for
- Minute caps per plan; the pricing page does not list overage rates.
- Self-serve setup.
PriceProfessional $49 a month (250 minutes), Scale $149 (1,000), Growth $299 (2,000).
Source: Rosie websiteGoodcall
A self-serve AI phone agent priced per agent, with unlimited minutes on every plan and limits set by unique customers a month.
Strengths
- Unlimited minutes on all plans.
- Free trial on every plan.
- Annual billing takes 15% off.
Watch for
- Plans cap unique customers a month (100 on Starter), with $0.50 per extra customer.
- You configure the logic flows yourself.
PriceStarter $79 a month per agent, Growth $129, Scale $249; $66, $108 and $208 billed annually.
Source: Goodcall websiteModern Mustard Seed(that's us)
A US AI studio in Kalispell, Montana that builds a custom AI voice receptionist around one business: its services, service area, prices and booking rules, in a natural voice. Built, tested and handed over.
Strengths
- Built for you, not a platform to configure yourself.
- Answers every call at once, around the clock, and books into your calendar.
- Can share one set of business facts with your website and Google profile.
- You own the configuration and accounts; changes to what we built are included.
Watch for
- Not a self-serve sign-up. It starts with a discovery call and a written scope.
- Overkill if you get a handful of calls a week.
PriceSet package price, quoted after a free discovery call
See what we buildRuby
A live virtual receptionist service. Ruby describes its service as "100% live, personalized communication," with coverage 24/7 including after hours, weekends and holidays.
Strengths
- Real people answer every call.
- No activation, onboarding or setup fees, per its pricing page.
- Live chat plans for your website too.
Watch for
- Plans are metered by minutes: 50 minutes on the Starter plan.
- Cost grows with call volume.
PriceStarter $250 a month (50 minutes), Professional $395 (100), Business $720 (200), Enterprise $1,725 (500).
Source: Ruby websiteAvoca
Calls itself "The AI Front Office for Service Businesses": an AI CSR for inbound booking, outbound campaigns, call coaching and web chat, for HVAC, plumbing, electrical, roofing, garage door, pest control and more.
Strengths
- A certified ServiceTitan app, with Housecall Pro and FieldRoutes integrations named on its site.
- Built specifically for the trades.
- Call coaching and analytics for a CSR team.
Watch for
- Pricing is not published; it starts with a demo.
- Aimed at companies with a dispatch board and a CSR team.
PriceNot published. Book a demo.
Source: Avoca website- Written for owner-operators and small crews in plumbing, HVAC, roofing, electrical, landscaping and cleaning.
- Competitor facts come from each company's own pages, read October 5, 2026.
- Sorted by business size and how much setup you will do yourself.
- Modern Mustard Seed wrote this page and is one of the options. Every option gets the same space.
Last checked October 5, 2026. Prices change; check each source before you buy.
Common questions
How do contractors stop missing calls?
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Put something on the line that answers when you cannot: a live answering service, a self-serve AI agent, or an AI receptionist built for your business. Voicemail alone only works when callers will wait.
Is an AI receptionist better than an answering service?
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For high volume and after-hours calls, AI usually costs less per call and answers every call at once. For sensitive calls that need a human, a live service wins. See the full comparison at modernmustardseed.com/compare/ai-receptionist-vs-answering-service.
Can I try before I commit?
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Rosie offers a 7-day free trial and Goodcall a free trial on every plan. You can hear the Modern Mustard Seed voice agent at (406) 312-1223.
Want it built for you?
Tell us what the business needs. We scope it in a free discovery call and agree a set package price before work starts.