Cold outreach with AI voice is legally complex but commercially powerful. This guide covers what's compliant, what's not, and how to design campaigns that convert without getting sued.
Critical compliance warning
Cold calling consumers (B2C) with AI voice is effectively illegal under TCPA without prior express written consent. B2B cold calling has more flexibility but still requires careful compliance. Violations cost $500-$1,500 per call. Consult a TCPA attorney before any AI cold outreach campaign.
The rules for AI cold outreach
TCPA and FCC rules on AI voice cold calling:
- Residential/consumer calls: AI voice calls to consumers without prior express written consent are illegal. Period. Don't do it.
- B2B calls: More permissive but still regulated. Must disclose AI upfront, honor DNC, respect calling hours. Some states have additional restrictions.
- AI disclosure required: FCC requires disclosure of AI use at the start of any AI voice call, regardless of consent status.
- Artificial voice restrictions: TCPA's "artificial voice" provision may apply to AI voice calls, restricting them in some circumstances.
- State laws: Florida, California, Washington, and other states have additional AI calling restrictions beyond federal law.
See our TCPA compliance guide for the full breakdown.
Designing compliant B2B cold outreach
For B2B cold outreach, follow these rules:
- Scrub against DNC — even B2B calls must respect the National Do Not Call Registry for individual phone numbers
- Verify business numbers — only call numbers verified as business lines (not personal cell phones used for business)
- Disclose AI in first 5 seconds — "Hi, this is Riley, an AI assistant calling from ABC Corp..."
- Respect calling hours — 8am-9pm local time of recipient
- Honor opt-out immediately — "Take me off your list" must end the call and update your DNC list within 24 hours
- Don't leave AI voicemails — FCC restricts artificial voice voicemails. Hang up on voicemail.
- Limit call frequency — don't call the same number more than once per 7 days
- Document consent — for any number you call, document the source of the lead and basis for calling
Sample compliant B2B cold call script
"Hi, this is Riley, an AI assistant calling from ABC Marketing. I work with [industry] businesses like yours on [specific value proposition]. Is now a bad time?
If yes: "No problem, I'll call back another time. Have a great day."
If no: "Great. I'll be brief — we help [target business type] with [specific outcome]. Would it be ok if I sent you an email with more info?"
If yes: capture email, send info, end call.
If no: "Understood, I'll take you off our list. Sorry for the interruption."
If they want to talk: "I can transfer you to one of our team members, or schedule a 15-minute call later this week. Which would you prefer?"Notice the script: discloses AI, asks permission, brief, offers opt-out, never tries to close the sale. The goal is to qualify and book, not to sell.
Best platforms for compliant cold outreach
- Bland AI — purpose-built for high-volume outbound, built-in compliance features (DNC scrubbing, time-zone windows, AI disclosure)
- Vapi — flexible, can integrate with any compliance tool, requires developer
- Retell AI — higher quality for cold calls where first impression matters, more expensive
Synthflow is less suited for cold outreach — its strength is inbound no-code workflows.
Frequently asked questions
Is AI cold calling legal?
For B2B with proper compliance, generally yes. For B2C (consumers), no without prior express written consent. The rules are complex and vary by state. Always consult a TCPA attorney.
What's the penalty for non-compliant AI cold calls?
$500-$1,500 per call under TCPA. Class action lawsuits can multiply this. There have been multi-million dollar judgments against companies using non-compliant AI voice calling.
Can I use AI to call my existing customers for upsells?
Generally yes, if you have an existing business relationship and they haven't opted out. Still must disclose AI and respect calling hours. Document the existing relationship in your records.
Should I leave AI voicemails?
Generally no — FCC restricts artificial voice voicemails under TCPA. If you must leave voicemails, use a pre-recorded human voice, not AI. Check current FCC guidance — this area is evolving.