Cloud business phone system with SMS, WhatsApp, AI call summaries and AI voice agents, from $15 per user per month with a 7-day trial.

Synthflow
Voice AI platform for building and running AI phone agents that answer and handle inbound and outbound business calls.
What is Synthflow?
Synthflow is a voice AI platform that lets businesses automate phone conversations with AI agents instead of manual call handling. Teams use it to build agents for customer support and sales calls, connect them to telephony, and launch them at scale. Enterprise deployments can use Synthflow Native Telephony, SIP trunking or approved enterprise carriers, along with planning for custom concurrency, routing, escalation paths, handoffs and fallback logic. Agents can be linked to CRM, calendar, contact-center, webhook, API and knowledge-source systems. The company also provides implementation, onboarding, testing, training and launch support, plus MSA and DPA support and workspace controls for security reviews. Synthflow pricing is sales-led: enterprise contracts start at $30,000 annually, and the final price depends on factors such as telephony setup, call volume, concurrency, integrations, security requirements and launch support. There is no self-serve plan listed, so new customers contact the sales team to scope a package.
Use cases
- Automate inbound customer support calls
- Run outbound sales calls with AI agents
- Route and escalate calls to human agents
- Book appointments by phone
- Connect phone agents to a CRM
- Test voice agents before launch
Who it's for
Why use Synthflow
- Phone conversations that used to need staff can be handled by AI agents, which makes customer support more scalable.
- Telephony options include native telephony, SIP trunking and approved enterprise carriers, so existing numbers and carriers can stay in use.
- Scoped onboarding, testing and launch support helps teams go live with fewer surprises.
- Escalation paths and fallback logic let agents hand off to people when a call needs it.
- MSA and DPA support and workspace controls fit enterprise procurement and security reviews.
Synthflow features
- AI voice agents for phone conversations
- Synthflow Native Telephony and SIP trunking
- Custom concurrency planning and routing
- Escalation paths, handoffs and fallback logic
- CRM, calendar and webhook integrations
- Knowledge-source and API connections
- Call, chat and simulation usage tracking
- Workspace controls and security review support
- Agency subaccounts with usage views
Synthflow integrations
How to get started with Synthflow
- Contact Synthflow sales with your expected call volume, use case, telephony needs and launch timeline.
- The team scopes an Enterprise package covering capacity, telephony, integrations, security and support.
- Build voice agents and connect them to your CRM, calendar, webhooks, APIs and knowledge sources.
- Set routing, escalation and fallback rules, then test the agents before going live.
- Launch, monitor usage in the Usage dashboard, and work with your account team on optimization.
Synthflow limitations
- Pricing is sales-led with no published self-serve plan
- Enterprise contracts start at $30,000 annually
- In-product reselling through Stripe was removed on September 15, 2026
Synthflow pricing
Synthflow is sold on custom quotes, so its prices aren't published. Paid plans start at $30,000 per year, according to the official pricing page on .
Synthflow plans
Enterprise
From $30,000/year
annual contract; final price scoped to usage
- Enterprise SLA and support terms
- Native Telephony, SIP trunking or approved carriers
- Custom concurrency, routing and fallback logic
- CRM, calendar and webhook integrations
- MSA/DPA support and security review
- Onboarding, testing and launch support
Plans as listed on the official pricing page on . Prices can change and may vary by country or exclude tax. Check the official pricing page.
Synthflow alternatives
The main Synthflow alternatives listed on Debuly are Vapi, ElevenLabs, DRING, Quiq, Bland and Open Computer. The table compares pricing and platforms; order is A–Z.
| Tool | Pricing | Starting price | Platforms |
|---|---|---|---|
| Synthflow | Contact sales | $30,000/yr | Web, API |
| Bland | Freemium | $0.14, usage-based | Web, API, CLI, Self-hosted |
| DRING | Contact sales | — | API |
| ElevenLabs | Freemium | $6/mo | Web, API |
| Open Computer | Contact sales | — | Self-hosted, API, Web |
| Quiq | Contact sales | — | Web |
| Vapi | Paid | $0.05, usage-based | Web, API, CLI |

Bland
Voice AI platform for building phone agents that take inbound and outbound calls, with per-minute pricing that includes the LLM, speech and voices.
FreemiumVisit Bland (official site)
DRING
AI agents that answer and make calls, and reply on WhatsApp, web chat and email, with a shared inbox for handover.
Contact salesVisit DRING (official site)
ElevenLabs
AI audio platform for text to speech, voice cloning, dubbing, transcription, music and conversational voice agents, via app or API.
FreemiumVisit ElevenLabs (official site)Open Computer
Private AI agent, model router and realtime voice layer that run on your own infrastructure, with human approval gates.
Contact salesVisit Open Computer (official site)
Quiq
Enterprise AI agent platform for customer service that resolves requests across voice, chat, SMS and email with guardrails and audit trails.
Contact salesVisit Quiq (official site)
Vapi
Developer platform for building voice AI agents that handle phone and web calls, with per-minute pricing and optional success packages.
Synthflow FAQ
How much does Synthflow cost?
Synthflow uses sales-led pricing. Enterprise contracts begin at $30,000 per year, and the final price depends on factors such as telephony setup, call volume, concurrency, integrations, security requirements and launch support.
Is there a free plan for Synthflow?
The current pricing page lists no free plan or self-serve tier. New pricing is scoped with the Synthflow team, so you contact sales to start.
What plans does Synthflow have?
The pricing page shows one Enterprise package, scoped per customer. Existing workspaces may keep legacy billing terms that are governed by their agreement.
Who is Synthflow for?
It is aimed at businesses and enterprises that want to replace manual phone handling with AI voice agents, including contact centers and agencies.
Does Synthflow have an API or integrations?
Yes. Enterprise packages cover integrations for CRM, calendar, your contact-center stack, webhooks, APIs and knowledge sources.
Does Synthflow support SIP trunking?
Yes. Enterprise telephony options include Synthflow Native Telephony, SIP trunking or approved enterprise telephony.
What are alternatives to Synthflow?
Alternatives for AI phone agents include Vapi, Retell AI, Bland AI, PolyAI, Air AI and Voiceflow.
Sources & verification
Facts on this page come from the official sources below, each with the date we read it. Written by Debuly; the vendor did not review this page.
| Source | Type | Accessed |
|---|---|---|
| synthflow.ai/ | official | |
| synthflow.ai/pricing | pricing | |
| docs.synthflow.ai/set-up-pricing-and-rebilling | pricing | |
| docs.synthflow.ai/pay-as-you-go.mdx | docs | |
| docs.synthflow.ai/billing | pricing | |
| docs.synthflow.ai/billing.mdx | pricing |
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