General contracting is a phone-heavy business. Homeowners call asking for estimates. Subs call about scheduling. Material suppliers call about deliveries. Project owners call with questions that need answers before work can continue. And you're on a job site for most of the day, which means a lot of those calls go nowhere.
Industry data from NextPhone's analysis of 1.4 million contractor calls shows general contractors miss 60-80% of inbound calls during working hours. For trades with $350-$500 average job values, that's painful. For GCs doing remodels, additions, and new builds at $2,000 to $10,000+ per job, it's a different level of hurt entirely.
General contractors miss 60-80% of inbound calls while on job sites. At $2,000-$10,000 average job value, missing 5 calls per week at 30% conversion costs $15,600-$78,000 per year. Dolfyn is the best done-for-you option with custom call flows for estimate qualification. NextPhone at $199/month flat is the strongest self-serve option. 78% of customers hire the first company that responds — speed matters as much as answering at all.
The speed problem compounds the miss rate. A Harvard Business Review study found that responding within 5 minutes makes you 100 times more likely to connect with a lead versus waiting 30 minutes. Research from Lead Connect shows a 391% increase in conversions when contact happens within 1 minute versus 30. A homeowner calling three GCs for estimates hires the first one who calls back. That's it. That's the whole game.
General contractor inbound calls are messier than most trades. An HVAC company gets calls that mostly fall into two buckets: service calls and installs. A GC gets estimate requests for projects that range from deck replacements to full home additions, insurance claims, commercial tenant buildouts, and everything in between.
That variety matters for evaluating AI. A generic system that asks "what can I help you with?" and takes a message isn't much better than voicemail. What you actually need is a system that captures project type, scope, rough budget, timeline, address, and whether the caller has already gotten other bids. Those are the five things a GC needs to decide if a site visit is worth scheduling.
| Tool | Price | Setup | Estimate Intake | Best For |
|---|---|---|---|---|
| Dolfyn | From $179/mo | Done for you | Custom per client | Custom project intake, done-for-you |
| NextPhone | $199/mo flat | Self-serve | Configurable | Self-configured, flat unlimited pricing |
| Cactus AI | Not public | Done for you | Yes, built-in | Lead qualification + follow-up workflows |
| Rosie AI | From $49/mo | Self-serve | Basic | |
| Dialzara | $29/mo + overages | Self-serve | None | Cheapest option, generic |
| Smith.ai | From $292/mo | Done for you | Human-handled | High-value commercial GC work |
The done-for-you piece matters more for GCs than most other trades. Plumbers get predictable call types. GCs get wildly variable ones. A system that's been configured around your specific project types — what you build, what you don't take on, your service area, your minimum project size, how you handle insurance work versus residential versus commercial — will qualify leads that are actually worth your time.
Dolfyn builds the intake flow from scratch around each client. You tell them what a good lead looks like and what a waste of time looks like. The agent filters accordingly. Every call reviewed daily, adjusted as the business changes.
Starts at $179/month, scales with call volume. Day or two to go live. Month to month, no annual contracts, 2-week free trial with no credit card.
NextPhone's $199/month flat rate covers unlimited inbound calls with contractor-specific training. Their model has processed 130,000+ contractor calls, which gives it real context around trade terminology and call types. You configure it yourself, which works well for GCs who are comfortable with software and want control over how leads get handled.
The flat pricing is genuinely valuable here. GC call volume spikes during busy seasons — spring and fall for most markets, after major weather events. Per-call or per-minute pricing models that look cheap on paper can surprise you in busy months.
Cactus raised $7 million in seed funding and is specifically built for home service contractors. Beyond basic call answering it includes lead reactivation, maintenance reminders, and referral workflows — more of a full lead management system than just a receptionist. Pricing isn't public so you'll need to request a demo. Worth evaluating if you're looking for something that goes beyond just answering calls.
Smith.ai starts at $292.50/month for 30 calls with live human receptionists. At GC call volumes that gets expensive quickly. Where it makes sense is commercial general contracting where most inbound calls are from project owners, architects, or developers — people where the quality of the first interaction genuinely matters. For residential volume, the math doesn't work as well.
The single most valuable thing an AI can do for a GC is qualify estimate requests before they reach you. A homeowner who wants a deck built, has a reasonable budget, is in your service area, and isn't getting 12 other bids is worth driving out to see. A homeowner who wants a full addition but has a budget that wouldn't cover the foundation is not.
Generic AI tools can't make that distinction because they don't know your project minimums, your service area, your specialties, or what you've learned to avoid. A custom-built system can. That's the core argument for the done-for-you options over self-serve, and it's most applicable to GCs than to any other trade on this list.
Homeowners shop for GCs at night. They're comparing reviews, looking at project photos, and calling numbers they found on Google after their kids are in bed. CallRail data shows roughly a third of home service calls happen outside business hours. Those are often the most motivated callers — people who set aside time specifically to start their project search.
If your phone goes to voicemail at 8pm, that caller has already moved on by the time you check messages in the morning.
Dolfyn is custom-built around your project types, service area, and qualification criteria. 2-week free trial, no credit card, live in a day or two.
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