Dig into details of comparison in pricing, features and performance.
Flexibility and Customization
Synthflow has stronger flexibility for custom workflows, multilingual support, and broader integration with many systems. It tends to let you adapt call flows more deeply and supports no-/low-code tools for creating complex, real-world flows (e.g. warming transfers, routing, etc.). Thoughtly is good for quick setup, with no-code drag-and-drop conversation editors, skills libraries, personality/voice traits, etc.
Telephony Capabilities
Synthflow appears to offer more advanced telephony-features: multilingual inbound/outbound call handling, robust simultaneous call handling (high concurrency), native CRM & calendar integration, with SIP trunking or custom telephony setups. Thoughtly also supports inbound & outbound calls, CRM/calendar integrations, and offers no-code flow and skills libraries, but some of the more advanced telephony bells & whistles appear more limited.
User Experience
Here Thoughtly has an edge, especially for less technical users: its interface is cleaner and easier to use according to reviews, set-up time is shorter, drag/drop editors, “voice agents in under 20 minutes” type of claims. Users seem to appreciate that Thoughtly makes getting started easy, so for teams with less dev resources, small businesses, or first trying voice automation, Thoughtly will be more pleasant. Synthflow is powerful, but some of that power comes with more complexity.
Call Quality
On call quality, Thoughtly seems to pull ahead, mostly due to its use of high-quality voice models (ElevenLabs voices, for example), good voice realism, accents/dialects, etc. There are reports that users of Synthflow also find it good, though perhaps with more variance (especially as call complexity or volume goes up, accents or unexpected inputs may degrade performance more).
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