Synthflow vs Voiceflow
Synthflow
synthflow.ai
Voiceflow
voiceflow.comSide by side
| Figure | Synthflow | Voiceflow |
|---|---|---|
| Price from | $2,500/mo | $81/mo |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 1 | 7 |
| Spec score · AI Voice Agents | 7.2 (#24) | 8.7 (#4) |
| Spec score · Conversational AI Platforms | 7.1 (#33) | 8.6 (#7) |
| Agent building | The visual Flow Designer lets teams define business logic, connect APIs, and build voice AI flows. | The platform combines agentic playbooks, deterministic workflows, global instructions, and guardrails. |
| Integrations | Synthflow says it connects with more than 200 apps, including HubSpot, Salesforce, RingCentral, Zapier, and Google Calendar. | Native connectors include Zendesk, Salesforce, HubSpot, Shopify, Airtable, Google Sheets, Gmail and Twilio. |
| Product | Synthflow describes itself as an enterprise Voice AI platform for automating inbound and outbound phone conversations. | Voiceflow is a platform for building, testing, deploying, and monitoring chat and voice agents across channels and languages. |
| Security certifications | Its Trust Center lists SOC 2 Type 2, GDPR, HIPAA, ISO/IEC 27001, ISO/IEC 42001:2023, and PCI DSS v4.0.1 among its compliance resources. | Voiceflow states that it is SOC 2 Type II audited, ISO/IEC 27001:2022 certified, GDPR compliant and HIPAA compliant. |
| Security controls | Synthflow documents two-factor authentication, enterprise single sign-on, allowed email domains, and signed webhooks. | The security page describes encryption at rest and in transit, customer-managed keys, multi-region backups, vulnerability scanning, penetration tests, SSO, WAF and DDoS protection. |
| Support | Enterprise pricing includes SLA and support terms scoped in the contract, along with implementation, onboarding, testing, training, and launch support. | Official documentation directs users to Voiceflow support by email and offers enterprise product demos. |
Plans
Voiceflow
- Agencies & PartnersFree
- StarterFree
- Pro$120 a month
- Business$500 a month
- Pro$972 a year
- BusinessesPriced on request
- EnterprisePriced on request
In their own words
Voiceflow
Voiceflow is a platform for building, testing, deploying, and monitoring chat and voice agents across channels and languages. Its builder combines agentic playbooks, deterministic workflows, shared instructions, and guardrails. Teams can review transcripts and call recordings, run evaluations and tests, and track analytics. Agents can reach users through a native chat widget, mobile apps, phone calls, SMS, or custom interfaces built with the Conversations API. Native integrations include Zendesk, Salesforce, HubSpot, Shopify, Airtable, Google Sheets, Gmail, and Twilio. Agents can also connect to external REST APIs, custom Functions, and MCP servers. Teams can choose from major LLM providers or bring their own model. Voiceflow says customer data is not used to train AI or machine-learning models and integrated model providers are configured for zero data retention. Its security information describes encryption at rest with customer-managed keys and encryption in transit using TLS and mTLS. The company was founded in 2019. Agencies and partners have a free-trial plan with usage-based billing; business pricing is available on request. Support includes implementation that can be self-serve or fully managed.