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Voice agent

Synthflow review

Synthflow is a no-code voice agent platform for inbound and outbound calls, now sold only as annual enterprise agreements.

Published · Updated . Facts checked November 12, 2026.

Fit by business size
  • Small business—
  • Mid-size company7.0
  • Enterprise7.2

Is Synthflow worth it?

It depends on your size and the job. Synthflow is worth it if you want no-code voice agents with an enterprise contract, support and security review. Its best placement is #4 of 12 in our voice and phone ranking. It's built for mid-size companies and enterprises, not small businesses. On the downside, annual contracts only. Consider Retell AI instead if you have someone who can build a custom voice agent and want high call quality at transparent per-minute prices. Price: custom pricing, as of November 2026.

Jobs it takes on4 of 10 fully
  • Answers customers: yesSupport
  • Finds and follows up with leads: partlySales
  • Writes and posts marketing: noMarketing
  • Handles email and calendar: noInbox
  • Takes and makes phone calls: yesPhone
  • Back office: reports, docs, data: noAdmin
  • Runs on a schedule or trigger: yesRuns alone
  • Asks before risky actions: partlyApprovals
  • Connects to hundreds of apps: partlyApps
  • API or MCP access: yesAPI/MCP

Synthflow screenshots

synthflow.aiScreenshot of the Synthflow homepage
Synthflow homepage, captured November 12, 2026
synthflow.aiScreenshot of the Synthflow pricing page
Synthflow pricing page, captured November 12, 2026

Our verdict

Synthflow offers no-code voice agents with enterprise support, but it has moved to annual enterprise contracts only, with no free plan, trial or per-minute pricing. Good for mid-size and large teams; out of reach for small ones.

Choose Synthflow if you want no-code voice agents with an enterprise contract, support and security review.

Where it ranks

Where it's strong

  • No-code voice building
  • Enterprise support and security review
  • Inbound and outbound
  • Telephony included in contracts

Where it falls short

  • Annual contracts only
  • No trial
  • No public pricing
  • Voice only

How it scored

Base scores

Used in every size ranking, each with its own weights.

Does the work7.5
Reach6.0
Setup6.0
Control7.5
Value5.0
Trust7.0
Enterprise readiness8.0

Voice and phone: 7.5

Call quality8.5
Configurability8.0
Telephony8.5
Pricing5.5
Setup6.0
Trust7.0
Does the work:
Once set up, does the agent finish real jobs on its own, on a schedule or when something happens, or does it wait to be prompted?
Reach:
How many of a business's jobs and tools it can reach: customers, inbox, phone, sales, marketing, back office and other apps.
Setup:
Can a non-technical person get it working from a plain-English description, without building flows, hiring a developer or a services team?
Control:
Approvals before risky actions, logs of what it did, spending limits, and how reliably it does the job the same way twice.
Value:
What you pay for the work you get, counting usage charges, seats, onboarding fees and minimum contracts.
Trust:
Refunds, data handling, the company behind it, and what public reviews say.
Enterprise readiness:
SSO, role-based admin, audit logs, compliance certifications, data residency and procurement terms a large company expects.

Synthflow pricing

PlanMonthlyBilled yearlyIncludes
Enterprisen/an/aAnnual agreement; concurrency scoped in contract

Prices as of November 2026, in US dollars before tax unless noted, from synthflow.ai or the sources below, checked November 12, 2026. Prices change; check before you buy.

Synthflow alternatives

  • Retell AI Teams building custom voice agents for inbound or outbound calls.Synthflow vs Retell AI
  • Vapi Developers who want full control over voice agents.
  • Bland AI Teams running high-volume phone calls who can configure a voice platform.
  • Crevio Small businesses that want one agent to handle customers, marketing and admin.
  • Lindy Busy owners who want an AI assistant for inbox, calendar, meetings and calls.

See all Synthflow alternatives

Sources