echowin vs Synthflow

Pricing, voices, languages, integrations and channels, side by side. echowin is a tool for operators who build and configure their own phone and chat agents.

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vs
echowin

Last checked: Synthflow: . echowin: .

Pricing

What you pay, and what costs extra

Free Plan
Synthflow
No
echowin
Yes
Base Price
Synthflow
Not published (quoted by sales)
echowin
No subscription. $10/mo per live phone number
Pricing Model
Synthflow
Annual enterprise agreement, scoped per deployment
echowin
Pay-as-you-go, or monthly minute bundles
Per-Minute Rate
Synthflow
Not published (no per-minute rate)
echowin
$0.20/min pay-as-you-go, $0.14 to $0.18/min on monthly bundles. Model, speech and telephony included
Transfer Pricing
Synthflow
AI usage stops when a transfer completes
echowin
Transferred leg billed at half rate
Free Trial
Synthflow
None (no free plan or trial)
echowin
$5 test balance after adding a card
Extra Costs
Synthflow
Not published (rates and overage set in each agreement)
echowin
Premium voices +$0.08/min. Live phone numbers $10/mo each
White Label Pricing
Synthflow
Not published (added in the enterprise agreement)
echowin
Grey label $149.99/mo, white label $499.99/mo

Voices and Languages

Voice library, languages and speech providers

Voices
Synthflow
Synthflow TTS (200 built-in voices), plus voice cloning
echowin
120+ library voices, plus voice cloning
Languages
Synthflow
30+ languages
echowin
Omega and Gamma engines: multilingual, detect the caller's language. Delta: 33 selectable languages. Theta: English only
Text-to-Speech
Synthflow
Synthflow TTS, ElevenLabs
echowin
Azure, Deepgram, ElevenLabs, Fish Audio, Google, Inworld, MiniMax, OpenAI, Speechify, Unreal Speech

Platform

How you build, scale and integrate

How You Build
Synthflow
Scoped with sales, live in weeks
echowin
No-code builder that drafts the agent from your website. Tools, workflows and webhooks when you need depth
No-Code Builder
Synthflow
Yes
echowin
Yes
API Access
Synthflow
Yes
echowin
Yes
Concurrent Calls
Synthflow
Not published (scoped in each agreement)
echowin
No per-line fee or plan cap
White Label
Synthflow
Yes
echowin
Yes
Integrations
Synthflow
200+, including Salesforce, HubSpot, Genesys, Cisco, Avaya and Freshworks
echowin
Google, Outlook, Wix, Square and GoHighLevel calendars. Zapier, webhooks, REST API, MCP server. Shopify (beta)

Channels

Where the agent can talk to people

Inbound Calls
Synthflow
Yes
echowin
Yes
Outbound Calls
Synthflow
Yes
echowin
Yes
Web Chat
Synthflow
Yes
echowin
Yes

Summary

Quick comparison overview

Best For
Synthflow
Mid-market and enterprise contact centers on an annual contract
echowin
Operators who want to configure their own agent: instructions, tools, workflows and integrations, without writing an API
Limitations
Synthflow
No free plan, trial or published per-minute rate. Every new deployment starts on a sales-scoped annual contract
echowin
No HIPAA BAA. Cold transfers only, no warm transfer. Outbound SMS only, no two-way texting. Telnyx numbers only, no SIP trunking

Who should pick Synthflow instead

  • Large enterprises that want a managed, contracted deployment, scoped with sales and run under an annual agreement.
  • Teams that want Synthflow's forward-deployed engineers to build and launch the agents with them, where the contract includes launch support.
  • Procurement processes that need MSA/DPA support and an enterprise security review in the contract.

What echowin does not do today: No HIPAA BAA. Cold transfers only, no warm transfer. Outbound SMS only, no two-way texting. Telnyx numbers only, no SIP trunking.

Moving from Synthflow to echowin

Self-serve – Sign up and configure your agent in the dashboard, instead of starting with a sales scoping call
No annual contract – Pay as you go, or a monthly bundle you can cancel anytime
Published per-minute pricing – $0.20/min pay-as-you-go, $0.14 to $0.18/min on monthly bundles, $10/mo per live number
Test before you pay – $5 test balance after adding a card, where Synthflow has no free plan or trial
Published white label pricing – $499.99/mo, where Synthflow scopes white label inside an enterprise agreement

Built by an operator, not a services team

Sean Porcher runs 8 Jiffy Lube locations and configured the echowin agent that answers tire-quote calls across all of them.

"We're seeing higher conversion rates on tire quotes compared to our website leads."
Sean Porcher
Sean Porcher, operator, 8 Jiffy Lube locations

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