Because Twilio's pricing is largely usage-based, unexpected traffic spikes — including from unauthorized use of your API credentials — could result in significant unexpected charges that you remain obligated to pay.
Twilio's ToS primarily affects developers and businesses who build on the platform rather than end consumers directly. Key impacts include mandatory arbitration that waives class action rights, significant indemnification obligations that shift legal risk to customers, and Twilio's broad right to suspend or terminate accounts with limited notice. You can opt out of arbitration by sending written notice to Twilio within 30 days of first accepting the terms.