# Synthflow (Synthflow)

Category: Voice AI agents. Public reviews about the AI: 7. Profile updated 2026-10-08.

Voice AI platform for enterprise phone automation, with no-code agent building and sales-led annual contracts.

## What it does

Synthflow builds AI agents that answer and place phone calls, and the same agents run on chat and SMS [1]. Agents connect to a company's own telephony or any SIP provider [1]. Synthflow says its forward-deployed engineers help launch agents [1].

Channels: Voice, Chat, SMS, WhatsApp. Works with: Telephony and contact center systems Cisco, Avaya, Genesys and RingCentral, any SIP provider, and CRMs such as Salesforce and HubSpot [1]. Docs cover Genesys Cloud, Five9, Salesforce, HubSpot, GoHighLevel and Freshworks [2].

## Handoff

Cold transfer hands the call off over SIP REFER without speaking to the person [3]. Warm transfer plays either a whisper message or an AI-generated summary of the conversation to the person before connecting, and the person can accept or decline the call [3]. SIP transfers can attach custom X-headers with data such as a reference ID [3]. Transfer destinations are chosen by conditions such as "caller asks for billing", with an out-of-hours message when no one is available [3].

## Controls

- Changes save to a draft; publishing shows what the draft adds and removes against the live version, and any earlier version can be restored [4].
- The Test Center runs simulated calls with an AI customer and marks each success criterion passed or failed, with up to 25 test cases per suite [5].
- PII redaction removes card numbers, Social Security numbers, names, emails, phone numbers and addresses from transcripts, webhooks and logs; live audio is not affected [6].
- Options to stop saving recordings or transcripts, and to delete transcripts, recordings and caller IDs after 30 days [6].
- Synthflow lists SOC 2, HIPAA, PCI DSS and GDPR, plus audit logs and region-based hosting [1].

## Setup

Agents can be built for free with templates before launch [1]. Synthflow says its forward-deployed engineers launch agents in weeks, not months [1].

## Billing

Per minute. Sales-led annual contracts that start at $30,000 a year, with final price set by call volume, concurrency, telephony and integrations [7]. Usage is counted in minutes against a contracted allocation, with overage per extra minute [8]. What counts: Minutes used in the contract period count against the allocation; calls after the allocation runs out are billed at a per-minute overage rate that is not published [8].

## Vendor claims (not results)

- Synthflow says it has handled more than 500 million customer calls and runs at 99.99% uptime [1].
- Synthflow says its agents give zero off-script or hallucinated responses [1].
- Synthflow says Freshworks automated 65% of routine calls and cut wait times by 75% [1].
- Synthflow says customers see measurable ROI in the first 60 days [1].

## Not found in public sources

- Per-minute rate and overage rate
- Content guardrails or blocked topics beyond following approved knowledge sources

## What reviewers say

- Does the job: 0 positive, 3 negative (too few to rate)
- Accuracy: 0 positive, 1 negative (too few to rate)
- Handoff to a person: 0 positive, 0 negative (too few to rate)
- Cost: 0 positive, 3 negative (too few to rate)
- Setup and upkeep: 0 positive, 0 negative (too few to rate)

> "The AI agents suffer from severe hallucinations, frequently deviating from their programmed instructions" (Small Business Owner, Trustpilot, 2026-05-04: https://www.trustpilot.com/reviews/69f8b0f57050e2b4aceff963)
> "I cancelled my subscription over 5 moths ago and continue to get billed each month." (Tyler C., Trustpilot, 2026-04-11: https://www.trustpilot.com/reviews/69da6b898f2ca725a91e7340)
> "the tools you actually need are locked behind their absurdly overpriced enterprise plan." (Dan M., Trustpilot, 2025-08-18: https://www.trustpilot.com/reviews/68a345e342a1782898733992)
> "The voice is the best I've found, unfortunately the entire rest of the platform is glitchy" (Keith D., Trustpilot, 2025-05-24: https://www.trustpilot.com/reviews/68322cf7d1b50c3f4c07cbf1)
> "So far so good, I need more time with the application to see how well it is going to work for me" (Jordan, Trustpilot, 2025-04-18: https://www.trustpilot.com/reviews/6802b08cc5eae4ade0ea8667)
> "Our bots went down over a week ago and they will not get back to me over me trying to pay them money!" (Michael H., Trustpilot, 2025-03-26: https://www.trustpilot.com/reviews/67e433ebdb522d89c79020c9)
> "I got charged for the free plan and even after cancelling the subscription I got charged Again." (NS, Trustpilot, 2025-03-05: https://www.trustpilot.com/reviews/67c86e9d63a8a2932ba71f10)

## Sources

1. [Synthflow home page](https://synthflow.ai/), Synthflow, accessed 2026-10-08
2. [Documentation index](https://docs.synthflow.ai/llms.txt), Synthflow, accessed 2026-10-08
3. [Call transfers](https://docs.synthflow.ai/call-transfers), Synthflow, accessed 2026-10-08
4. [Version control](https://docs.synthflow.ai/version-control), Synthflow, accessed 2026-10-08
5. [Simulations](https://docs.synthflow.ai/simulations), Synthflow, accessed 2026-10-08
6. [Security and compliance](https://docs.synthflow.ai/security-and-compliance), Synthflow, accessed 2026-10-08
7. [Pricing](https://synthflow.ai/pricing), Synthflow, accessed 2026-10-08
8. [Billing](https://docs.synthflow.ai/billing), Synthflow, accessed 2026-10-08

Canonical page: https://get-support-ai.com/products/synthflow