Vendor intelligence
Synthflow
A visual voice-agent workflow platform sold through scoped deployments and partner delivery.
Read the signals. Keep the scope.
A place in your stack.
Best for
- Operations teams that need reviewable flows and a sales-scoped rollout.
- Integrators delivering managed customer-service automation.
Watch-outs
- Do not apply old self-service rates to a new contract.
- Test transfer fallback and negotiate capacity, integrations and support as a single scope.
Product specification
What the evidence says.
Unknown means we have not established it. It does not mean No. Compliance claims require plan and contract review.
White label
Agency branding settings exist for eligible workspaces.
Source ↗ (opens in new tab)Client tenancy
Agency subaccounts receive allocated usage/capability limits.
Source ↗ (opens in new tab)Client billing
In-product Stripe reselling explicitly removed September 15, 2026. Historical instructions remain below the deprecation banner; do not present them as current.
Source ↗ (opens in new tab)ISO 27001
Not established by the evidence reviewed. This does not mean unsupported.
No verified sourceBAA availability
Public BAA template is executed at contract signing; HIPAA Setting restrictions are part of the agreement.
Source ↗ (opens in new tab)SIP
Carrier/PBX SIP integration is documented; compatibility and account terms apply.
Source ↗ (opens in new tab)Warm transfer
Cold, whisper-message and summary transfers are documented. SIP/provider and destination settings affect behavior.
Source ↗ (opens in new tab)Cold transfer
Cold, whisper-message and summary transfers are documented. SIP/provider and destination settings affect behavior.
Source ↗ (opens in new tab)Batch calling
Not established by the evidence reviewed. This does not mean unsupported.
No verified sourceMCP tools
Official workspace MCP connector exists; management tooling is separate from the runtime model.
Source ↗ (opens in new tab)Webhooks
Post-call payload is delivered to the customer endpoint.
Source ↗ (opens in new tab)Calendar
No scoped current connector or documented integration path was established. Generic API feasibility and navigation mentions are not Native integration evidence.
Source ↗ (opens in new tab)Source ↗ (opens in new tab)Source ↗ (opens in new tab)CRM
Install Synthflow AI Phone Calling from HubSpot Marketplace and connect the account.
Source ↗ (opens in new tab)Bring your carrier
Carrier/PBX SIP integration is documented; compatibility and account terms apply.
Source ↗ (opens in new tab)Bring your model
Bring-your-own OpenAI/Azure credentials are documented only for BYOK-enabled agreements.
Source ↗ (opens in new tab)Bring your voice
ElevenLabs credential connection is documented; this is provider-key support, not arbitrary TTS endpoints.
Source ↗ (opens in new tab)HIPAA / BAA
Vendor HIPAA path is conditional on the executed BAA and HIPAA Setting; not an independent certification.
Source ↗ (opens in new tab)SOC 2
Reviewed source says SOC 2 without identifying Type II. Generic SOC 2 wording cannot establish the audit type or independently reviewed certification; request the applicable audit report.
Source ↗ (opens in new tab)GDPR
Security documentation lists supplier compliance claims. Independent report and buyer deployment were not audited.
Source ↗ (opens in new tab)Languages
Multilingual mode switches among a documented subset of languages; selected transcriber matters.
Source ↗ (opens in new tab)Voices
Not established by the evidence reviewed. This does not mean unsupported.
No verified sourceRealtime audio
Not established by the evidence reviewed. This does not mean unsupported.
No verified sourceVoice cloning
Not established by the evidence reviewed. This does not mean unsupported.
No verified sourceArchitecture & connections
Understand the moving parts.
STT
Deepgram · Synthflow STT
LLM
OpenAI
TTS
Synthflow TTS · ElevenLabs · Deepgram
TELEPHONY
Synthflow-managed · Custom Enterprise telephony
Integrations
Salesforce · HubSpot · WhatsApp · Webhooks · MCP connectors
Evidence you can inspect.
A documented feature, a supplier claim and an unanswered question are different kinds of evidence.
Evidence coverage details
- Strong-source resolved
- 63
- Vendor-claim only
- 2
- Conditional
- 17
- Other sourced outcomes
- 0
- Unknown after research
- 32
- Conflicting evidence
- 0
- Not applicable
- 0
- Not researched
- 0
Inspect detailed evidence, sources and research gaps
September 2026 remains the historical baseline. A new research date does not mean a feature launched that day. Unknown after research and not researched are separate states.
Official documentation establishes what the supplier documents. No paid calls, independent product benchmarks or compliance audits were performed in this research pass. Coverage measures research work, never product quality.
The operating decision.
Price structure
Custom / sales-led
V3.3 evidence review · Enterprise contract starting annual commitment; scoped quote required
Sales-ledcontract;call usage metered but exact unitrates and allowances negotiated.
Human fallback
Warm transfer · Cold transfer
Derived from individually verified capabilities. Other selections remain Unknown.
Documented transfer is not a staffed human service. Verify who answers, when they answer and what happens if they do not.
Try it yourself
Unknown — no independently checked public demo entry is attached.
External signals
No dated external signal in this record. Missing evidence is not a negative review.
Underlying model context: the documented stack above does not establish an exact benchmark checkpoint or its deployed settings. Public model results cannot become a Synthflow score.
Append-only price history
Every capture leaves a trace.
A new check creates a new snapshot. Deltas appear only for the same currency, unit, model and scope.
Tracked: Numeric rate undisclosed · V1 archive · Sales-led, scoped agreement
Tracked: Numeric rate undisclosed · New sales-led deployment
Tracked: Numeric rate undisclosed · V3.2 evidence review · Contract-specific
Tracked: $30,000 / year · V3.3 evidence review · Enterprise contract starting annual commitment; scoped quote required
Tracked: $30,000 / year · V3.3 evidence review · Enterprise contract starting annual commitment; scoped quote required
Tracked: $30,000 / year · V3.3 evidence review · Enterprise contract starting annual commitment; scoped quote required
New research observations preserve earlier captures. “Evidence improved” records what we learned; it does not claim the market changed on that date. September 2026 is the historical baseline.
Price the actual workflow.
Complete cost cannot be established from this reference. No complete current public contract rate and allowance schedule was established. · Account agreement and carrier/add-on terms require quote
Carry the current source into your estimate, then enter the model, voice, carrier and fixed fees your configuration needs.
Alternatives by category
Other full platforms to inspect.
Alphabetical alternatives within the same category. An editorial starting point, not a performance ranking.
Read the Synthflow alternatives guide →
Teams that want AI escalation to land in the same operating environment as human calls.
CompareSmall businesses looking for reception plus follow-up tools in one subscription.
CompareEvidence archive
Inspect the record.
Synthflow billing overviewreviewed
New deployments use sales-led scoped pricing based on volume, telephony, integrations, security and launch support. Existing accounts may retain legacy terms. Public docs are not an account-specific quote.
Inspect official source ↗Synthflow introductionreviewed
Synthflow documents inbound/outbound agents, a visual flow builder, testing, webhooks and Salesforce/HubSpot integration. Custom telephony is restricted to Enterprise in the FAQ.
Inspect official source ↗Synthflow call transfersreviewed
Cold transfer uses SIP REFER. Warm modes deliver a message or generated summary, with human detection and failure handling. Carrier configuration affects caller ID and transfer compatibility.
Inspect official source ↗Synthflow MCP connectorsreviewed
Synthflow documents in-call external MCP tools on Prompt Builder agents only. Flow Designer support is planned; management MCP connectors are separate.
Inspect official source ↗Synthflow partner programreviewed
Referral, BPO, reseller/integrator and technology tracks are published. Revenue terms are negotiated during qualification. White-label availability depends on the partnership model.
Inspect official source ↗Evidence describes documented scope, not a tested platform score. Unknown means a conclusion has not been established; API connectivity does not establish a native integration. Read our research methodology →
No verified affiliate enrollment or tracking link.
Partner terms negotiated; no published self-service affiliate rate verified.