Best for
Best for laptop-first teams in back-to-back external calls who want structured notes without a recording bot in the room.
- Freelancers
- Small and mid-sized
- Enterprise
AI Voice & Speech Comparison
Granola vs. Synthflow
At a glance
At a glance
Best for
Best for contact centres and outsourcers that want phone agents built, branded and launched under one contract.
- Enterprise
Cataleo does not name a winner. Both statements come from the vendors themselves.
Full Comparison
| Criterion | Granola | Synthflow |
|---|---|---|
| Starting price | lower value Free tier, then $14 / user / month Business is $14 per user per month and Enterprise $35. The free Basic plan takes unlimited notes but limits how far back the history reaches. | From $30,000 / year Enterprise contracts start there and are scoped around call volume, concurrency, telephony setup, integrations, security needs and launch support. No self-serve tier is published. |
| Free trial | Free Basic plan with AI meeting notes, AI chat, shared folders and custom templates | Not stated |
| Commercial use | Not stated | Yes, under an enterprise contract |
| Output | Transcripts and structured meeting notes with summaries and action items | Voice and chat agents for inbound and outbound phone calls, including white-labelled agents resold under a partner's brand |
| API | Yes, on Business and Enterprise, alongside an MCP server | Yes, a public Platform API, plus an MCP server for MCP-capable clients |
| Hosting | Cloud, with desktop apps for macOS and Windows, iOS and Android apps and Apple Watch support | Cloud, with region-based hosting |
| Voice cloning | No, Granola transcribes and summarises speech and does not synthesise or clone voices | Cloning happens in ElevenLabs, not in Synthflow. The voice selector offers Synthflow's own TTS with twelve built-in voices and the ElevenLabs models from Turbo v2 and Flash v2.5 up to v3; a cloned or provider-specific voice is added through Imported > Import Voice by pasting the provider voice ID, or by connecting your own ElevenLabs API key so that account's custom voices appear in the selector. The vendor warns that a synthesiser model your own ElevenLabs plan lacks can mean lower quality or higher latency on your key |
| Real-time use | Yes, it transcribes the computer's own audio live during a call without joining as a bot, and on mobile it captures in-person meetings and phone calls | Yes, live inbound and outbound calls, with IVR handling for outbound agents, voicemail and silence handling, in-call SMS and WhatsApp messaging, and WhatsApp Business calling. The vendor states 99.99% uptime on its own telephony infrastructure |
| Languages | Multi-language support, included from the free Basic plan upwards | Over 30 languages are listed in the documentation, plus a multilingual mode that switches between English, Spanish, French, German, Hindi, Russian, Portuguese, Japanese, Italian and Dutch within a single call. Speech recognition runs on Deepgram or Synthflow's own engine, which the vendor recommends for non-English |
| Speech-to-speech and dubbing | No dubbing or speech-to-speech translation | Not documented. The voice documentation covers text-to-speech for live agents, with a speaker and a synthesis model chosen per agent, and carries no speech-to-speech conversion and no dubbing |
| Editing and controls | Customisable note templates, shorthand typed during the call expanded against the transcript, AI chat across the whole meeting history, shared folders and search | Flow Designer, a node-based canvas with conversation, message, branch, jump and custom action nodes, or a simpler prompt builder, plus a multi-agent system for several flows behind one agent, voice model and pacing settings, manual testing, automated simulations and custom evaluations that score calls against business goals |
| Consent and trust | Opt-out of model training on every plan, with an org-wide opt-out, SSO, admin controls over sharing and API use, usage analytics, org-wide auto-deletion and an org-wide usage notification on Enterprise | SOC 2, HIPAA, PCI DSS, GDPR and ISO 27001, with encryption, audit logs and region-based hosting. Per-agent controls decide whether recordings and transcripts are kept at all, cap retention at 30 days, and redact personal data from transcripts, webhook payloads and logs |
| MCP-ready | Yes | Yes |
| Deployment | Cloud (SaaS), Browser-based | Cloud (SaaS), Browser-based |
| Support | Not stated | Email helpdesk |
| Onboarding | Not stated | Documentation and knowledge base, Personal consulting |
| Company size | more entries Freelancers, Small and mid-sized, Enterprise | Enterprise |
| Integrations | Zoom, Google Meet, Microsoft Teams, Attio, Notion, Slack, HubSpot, Affinity, Zapier | more entries HubSpot, Salesforce, Zapier, Cal.com, GoHighLevel, Twilio, Genesys, Avaya, Five9, Cisco, RingCentral |
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The short version
Key Differences
- Starting price Granola Free tier, then $14 / user / month Synthflow From $30,000 / year
- Company size Granola Freelancers, Small and mid-sized, Enterprise Synthflow Enterprise
- Hosting Granola Cloud, with desktop apps for macOS and Windows, iOS and Android apps and Apple Watch support Synthflow Cloud, with region-based hosting
- Output Granola Transcripts and structured meeting notes with summaries and action items Synthflow Voice and chat agents for inbound and outbound phone calls, including white-labelled agents resold under a partner's brand
- API Granola Yes, on Business and Enterprise, alongside an MCP server Synthflow Yes, a public Platform API, plus an MCP server for MCP-capable clients
Every line is one datapoint from the table above, picked automatically. Nothing here is written text.
The trade-offs
Strengths and Limitations
Granola
Strengths
- No bot joins the call, so nothing appears in the attendee list
- Expands shorthand typed during the meeting instead of replacing note-taking
- AI chat runs across the whole meeting history, not a single transcript
- Opt-out of model training on every plan, including the free one
- MCP server and API on Business, so meeting context reaches other AI tools
Limitations
- Capture depends on a machine being in the meeting, since it records local computer audio
- The free plan limits how far meeting history reaches back
- Integrations, API and MCP start on the Business plan
Synthflow
Strengths
- No-code Flow Designer with a multi-agent system, so a non-developer can build and change call flows
- Connects to existing telephony and contact centre stacks over SIP, including Genesys, Avaya, Five9, Cisco and RingCentral
- White-labelled deployments for partners reselling voice agents under their own brand
- SOC 2, HIPAA, PCI DSS, GDPR and ISO 27001, with agent-level retention and PII redaction controls
Limitations
- No self-serve or trial tier is published; the only listed plan is an enterprise contract from $30,000 per year
- Pricing is scoped by sales, so the cost of a given call volume is not knowable from the website
- Latency figures differ between the vendor's own pages, so the published number is not a specification to rely on
- A cloned voice has to be created in a separate ElevenLabs account and imported, so it means a second subscription alongside Synthflow
Plans
Pricing
Granola
- Basic $0 Per user per month. AI meeting notes, limited meeting history, AI chat, shared folders, customised templates, multi-language support and opt-out of model training.
- Business $14 Per user per month. Adds unlimited meeting notes and history, advanced AI thinking models, integrations with Attio, Notion, Slack, HubSpot, Affinity and Zapier, centralised billing, MCP integration and API access.
- Enterprise $35 Per user per month. Adds enterprise security and admin controls, SSO, priority support, usage analytics, org-wide auto-deletion, admin control over sharing and API, a team-wide model training opt-out and an org-wide usage notification.
Synthflow
- Enterprise $30,000 Per year, the stated starting point. Scoped around call volume, concurrency, telephony setup, integrations and security needs, and covers implementation, onboarding, testing, training, launch support and ongoing optimisation, with SLA and support terms set in the contract.
What users say
Review Scores · opens after launch
Granola
- Ease of use
- Not rated yet
- User interface
- Not rated yet
- Onboarding
- Not rated yet
- Support and service
- Not rated yet
- Value for money
- Not rated yet
- Features
- Not rated yet
No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.
Synthflow
- Ease of use
- Not rated yet
- User interface
- Not rated yet
- Onboarding
- Not rated yet
- Support and service
- Not rated yet
- Value for money
- Not rated yet
- Features
- Not rated yet
No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.
Where this comes from
Where this comes from
Granola https://www.granola.ai · checked against the official source on 2026-09-15
Synthflow https://synthflow.ai · checked against the official source on 2026-09-13
This table lists factual criteria taken from information the vendors publish themselves. For how we put it together, see the methodology.