Use cases / General Contracting / Missed & after-hours calls
Missed-call text-back
The owner can't answer on a job site, and some callers move on.
Proof build available
We built this one for real: Twilio and Vercel, 23 passing tests, with real 10DLC costs and gotchas. Locally tested, not yet run live. See the proof build and code →
The business case
Incremental-lift model: baseline lost volume × lift × job value × gross margin − running cost. Every input below is an illustrative assumption, not an industry statistic. Measure the client's real baseline first.
- Baseline: 8 missed calls per week with no callback within an hour
- Average job value $6,000, gross margin 25%, running cost $50/mo, setup $600
| Case | Lift (extra booked jobs ÷ baseline) | Extra gross profit / mo | Payback |
|---|---|---|---|
| Conservative | 5.0% | $2,548 | 0.2 months |
| Expected | 10.0% | $5,146 | 0.1 months |
| Optimistic | 15.0% | $7,744 | 0.1 months |
Requirements & gating
- Business SMS (US): requires A2P 10DLC brand and campaign registration, with sample messages, a verifiable opt-in flow, and opt-out language. Since June 30, 2026, new campaigns must include public privacy policy and terms URLs, and the privacy policy must say mobile and consent data isn't shared for marketing. A sole-proprietor campaign is limited to one number. verified
- Zapier, Make, and n8n connectors for the job-management app: not verified. Confirm the exact trigger exists before you rely on it.
Check what the app already does first:
- Jobber includes automated quote follow-ups, visit reminders, on-my-way texts, invoice follow-ups, and Google review requests with up to two reminders verified.
Build steps
- Check whether the phone system or app already does this (OpenPhone/Quo and others advertise it: not verified).
- Otherwise use Twilio: a missed-call status callback triggers an SMS through a registered 10DLC campaign.
- The LLM handles the reply thread to capture the project type and address, then hands off to the owner.
Test cases before go-live
- A caller who is a known spam number gets no text.
- STOP is honored.
Tool names are examples, not endorsements. Check current features, plan tiers, and pricing before quoting a client.
Sample prompt
A caller missed us. Send: 'Sorry we missed you, this is {biz}. What can we help with? Reply STOP to opt out.' Then collect the project type and address and hand off.Pitch it to the owner
"Missed callers get a text back within a minute."
Lead with the outcome, not with "AI," and show the business case using their own numbers.
What can go wrong
- 10DLC registration is required. Keep follow-ups conversational.
- Texting consent: Under the TCPA, automated texts generally need prior express consent, and marketing texts need prior express written consent. Honor STOP right away and keep consent records.
- Twilio/10DLC (2026): new A2P 10DLC campaigns must include public privacy policy and terms URLs (required since June 30, 2026), a verifiable opt-in, and opt-out language. Third-party lead generation and affiliate marketing are forbidden use cases. verified
- Reactivation defaults to email. Texting past customers is marketing. Use SMS only where written consent is documented.
- Call-recording consent: some states, including California, require all parties to consent (this list is not exhaustive). The safe default is to disclose recording and the automated assistant at the start of every call.
- AI voices: the FCC's February 2024 declaratory ruling (FCC-24-17) treats AI-generated voices as 'artificial voice' under the TCPA, so outbound AI calls generally need prior express consent. Further AI disclosure rules were only proposed in 2024. Keep builds inbound unless counsel approves. verified
- Failure modes: hallucinated details, missed escalations, and integrations that break silently. Add a human fallback, daily error alerts, and a weekly transcript review.
Not legal advice. Texting, calling, and recording rules vary by country and state and change over time. Have the client confirm compliance with qualified counsel before launch.
Suggested price
$400–$1,200 setup + $50–$150/mo
Starting estimate only, not verified against market rates. Adjust for scope and support.