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Synthflow vs Sesame

SynthflowSesame

Bottom line: Synthflow for agencies building voice agents for clients; Sesame for people curious about the most natural-sounding voice AI available.

SynthflowSynthflow

No-code AI voice agents for calls

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SesameSesame

Lifelike conversational voice AI companions and ambient intelligence, from the team behind viral voices Maya and Miles.

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Votes00
PricingPaidFree
CategoryVoice AgentsAudio
Tags
voice-agentsai-phone-callsno-codeconversational-aicall-automation
voice-aiconversational-aicompanion
Best for
  • agencies building voice agents for clients
  • SMBs wanting no-code call automation
  • teams without in-house voice-AI developers
  • People curious about the most natural-sounding voice AI available
  • Users who prefer voice-first, conversational interaction
  • Early adopters comfortable with preview-stage software
Pros
  • No-code visual builder for non-developers
  • Strong CRM, calendar, and tool integrations
  • Agency and white-label orientation
  • Flexible bring-your-own-provider model
  • Well funded with Accel-led Series A
  • Exceptionally natural, human-like voices with breaths, pauses and emotion
  • Voices can be interrupted and respond in real time
  • Free to try via browser and mobile preview
  • Open-source CSM-1B model available for developers under Apache 2.0
  • Backed by an experienced team (Oculus co-founder Brendan Iribe) and major investors
Cons
  • Advertised per-minute rate understates real cost with add-ons
  • Managing separate provider accounts adds complexity
  • Self-serve tiers have narrowed toward enterprise contracts
  • Total cost can reach $1,600-2,000+/month for agencies
  • Pricing model changed, causing confusion
  • Still an early preview and research product, not a polished mainstream app
  • Access and features are limited and can change without notice
  • Primarily English-focused, with limited multilingual support
  • No public consumer pricing, API or broad third-party integrations yet
  • Eyewear and full product experience are not yet available (targeted 2027)

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