Both run AI voice agents over the phone. They are built for different buyers: Synthflow for enterprises that want a managed rollout with many integrations, VoiceOI for outbound call floors, especially VICIdial shops, that want per-bot pricing and to run their own scripts.
| VoiceOI | Synthflow | |
|---|---|---|
| Pricing model | Prepaid per bot (one concurrent call slot), no per-minute AI fee. | Enterprise contracts starting at $30,000 per year, priced on volume, concurrency, telephony, integrations, security and launch support. |
| How you buy | Self-serve sign-up; talk to sales for volume. | Sales-led enterprise contract. |
| Telephony | Any SIP carrier (including Twilio and Telnyx SIP trunks), added in the Carrier Manager; or VICIdial remote agents. | Synthflow native telephony, SIP trunking, or approved enterprise telephony. |
| Integrations | VICIdial outcome write-back; Google Sheets (call data to a sheet). CRM integrations coming soon. | CRM, calendar, contact-center stack, webhook, API and knowledge-source integrations. |
| Bot types | Recorded-voice bots (real recordings, fixed branching script) and AI agents. | AI voice agents. |
| Implementation | Build it yourself in the no-code builder and test in the simulator; edits apply on the next call. | Implementation and launch support included in the enterprise package. |
Synthflow details from Synthflow's pricing page, reviewed October 2026. Competitor information changes often; verify on their site.
Per Synthflow's pricing page (October 2026), Synthflow sells enterprise contracts starting at $30,000 a year, priced on call volume, concurrency, telephony setup, integrations, security needs and launch support. VoiceOI is prepaid per bot (one concurrent call slot) with no per-minute AI fee; current rates are on the VoiceOI pricing page.
Synthflow lists CRM, calendar, contact-center, webhook, API and knowledge-source integrations in its enterprise package. VoiceOI today integrates with VICIdial (bots as remote agents, outcomes written back), any SIP carrier, and Google Sheets (call data written to a sheet); CRM integrations are coming soon.
Yes. VoiceOI bots run as VICIdial remote agents, can be provisioned in bulk, and write call outcomes back to VICIdial, so your campaigns, lists and reports stay where they are.
No. You can sign up and build a bot yourself in the no-code builder, test it in the simulator, and talk to sales when you want help or volume pricing.