| Twilio (baseline) |
Per segment, plus carrier fees and number rental |
$0.0083 / segment+ $0.0035 to $0.005 carrier fee; $1.15/mo per number |
Required |
WhatsApp: yes, $0.005 / message + Meta feesiMessage: not listed |
Built-in option (connect your own Twilio account) |
Developers who need voice, short codes and global reach from one API |
| VoidFix Gateway |
Flat monthly fee by number of phones; you send through your own SIM plans |
$49/mo for 5 devicesUnlimited SMS on paid plans, no per-message fee; your SIM plan costs extra |
No 10DLC step (texts go from your SIMs); carrier rules still apply |
WhatsApp: yes, from $19/moiMessage: yes, from $99/mo per line |
Native for SMS, WhatsApp and iMessage; replies land in GHL Conversations |
GHL agencies and SMBs texting opted-in contacts at steady volume |
| LC Phone (HighLevel) |
Per segment through your HighLevel wallet |
$0.00747 / segment+ $0.0035 to $0.005 carrier fee; $1.15/mo per number |
Required; $22.50 to $64 one-time, then $1.50 to $10.50/mo per campaign |
WhatsApp: through HighLevel's WhatsApp add-on, billed per messageiMessage: not listed |
Built in; nothing to connect |
Agencies that want one HighLevel bill and have registered A2P |
| Telnyx |
Per message part, plus carrier fees |
$0.004 / part+ $0.0035 to $0.005 carrier fee; $1.00/mo per number |
Required |
WhatsApp: yes, at Meta ratesiMessage: not listed |
Not a built-in GHL phone option |
Developers who want a low per-message rate |
| Plivo |
Per message, plus carrier surcharges |
$0.0077 / SMS+ $0.0035 to $0.005 surcharge; $0.50/mo per number |
Required |
WhatsApp: yes, US marketing $0.025, utility $0.0034 / message + platform feeiMessage: not listed |
Not a built-in GHL phone option |
Teams moving a Twilio-style API integration |
| SignalWire |
Per segment, plus carrier pass-through fees |
$0.00415 / segment+ carrier pass-through; $0.50/mo per number |
Required; $4.50 brand, $7.50 vetting, $10/mo standard campaign |
WhatsApp: early-access alphaiMessage: not listed |
Not a built-in GHL phone option |
Developers building programmable voice and messaging apps |