Synthflow pricing: Plans, usage costs, and how it compares to SquawkVoice

Synthflow overview

Synthflow is a no-code voice AI platform for building conversational phone agents. It handles inbound and outbound calls across use cases like customer support, appointment scheduling, lead qualification, and sales outreach.

The platform centers on a drag-and-drop builder where you design agent workflows, connect integrations (HubSpot, Salesforce, Cal.com, Stripe, Zapier, and others), and deploy agents across phone, web chat, SMS, and WhatsApp. It supports over 30 languages through ElevenLabs voice integration.

The typical Synthflow user is an agency building voice agents for clients or a technically inclined team seeking granular control over agent behavior. The builder is powerful, but multiple reviewers note that getting agents to perform well in production takes more effort than the “no-code” label implies. Setup is fast. Tuning is not.

Synthflow pricing plans and what you get

Synthflow currently offers two pricing paths: Pay-as-you-go and Enterprise. The older tiered plans (Starter at $29/month, Pro at $99/month, Growth at $449/month, Agency at $899/month) have been removed. If you find those referenced on third-party review sites, they are outdated.

Pay-as-you-go: what it actually costs

There is no monthly subscription. You are billed per minute of conversation, but your per-minute cost is the sum of three separate components:

A common configuration — GPT-4.1 with Synthflow-managed Twilio — costs $0.16/min. Switch to GPT-4.1 mini and bring your own Twilio account, and the rate drops to $0.11/min. Synthflow’s own FAQ confirms most pay-as-you-go setups fall between $0.15 and $0.24 per minute.

What is included: Unlimited agents, API access and integrations, 5 concurrent calls, SOC 2/GDPR/ISO 27001 compliance, ticketing support, Synthflow Academy.

What is not included: SIP trunking, white-label tools, dedicated support, uptime SLAs, or HIPAA compliance.

Enterprise

For teams processing 10,000+ minutes per month, Synthflow offers custom enterprise pricing. This tier adds a 99.99% uptime SLA, SIP trunking, white-label and reseller tools (included rather than charged separately), unlimited concurrent calls, HIPAA compliance, and a dedicated solution architect.

Enterprise pricing requires a sales conversation. Third-party sources suggest rates can reach $0.07–$0.08/min at high volumes.

Per-minute costs, overages, and what counts as usage

You are billed for actual conversation time only. Failed calls are not charged. That is a genuine plus.

Two details worth noting:

Phone numbers: Each agent requires their own phone number at $1.50/month. Five agents means $7.50/month in phone costs alone, before any call volume. Synthflow currently supports numbers from the US, Canada, and Australia natively, with other countries available through a Twilio integration.

Chat usage: Messages through web widget, SMS, or WhatsApp count against voice minutes. The conversion is 5 messages sent or received = 1 minute of voice usage.

Concurrent calls, phone numbers, and add-ons

Pay-as-you-go includes 5 concurrent calls. Additional concurrency costs $20/call/month, up to 50 calls. Enterprise includes unlimited concurrency.

Other add-ons that affect your effective per-minute rate:

Enabling both Performance Routing and Global Low Latency Edge adds $0.08/min to your base cost. A $0.11/min configuration becomes $0.19/min. Factor these in before committing.

SquawkVoice overview

SquawkVoice is an AI voice agent platform that answers business calls, handles routine inquiries, books appointments, manages order status, and escalates complex issues to live agents with full conversation context.

It ships as two products. The WebApp is built for mid-market teams that need configured workflows, backend integrations, and call analytics. The MobileApp is built for small business owners — an HVAC technician, a dentist, an electrician — who need an AI receptionist they can set up in minutes on their phone and forget about.

Where Synthflow gives you a builder to design agents from scratch, SquawkVoice delivers production-ready agents with less configuration. SquawkVoice has production-ready agents out of the box, while Synthflow requires significant time and effort to navigate its setup options, with additional subscriptions required for integrations.

The platform supports over 30 languages, integrates with CRMs (including Freshworks), calendars, and telephony systems, and provides recordings, transcripts, summaries, and structured actions for every call.

SquawkVoice pricing (for comparison)

SquawkVoice uses flat per-minute pricing. No component math. No separate charges for voice engine, LLM, or telephony. The rate you see is the rate you pay.

Plan breakdown: Growth, Pro, and Enterprise

Two things worth highlighting. First, there are no penalty rates for overages. On Pro, every minute beyond your commitment is billed at the same $0.18/min. Second, unused minutes roll into an Annual Credit Pool and can be applied later in the year during busier months.

Standard plans are annual. Additional discounts are available for 3-year commitments. Mid-year tier upgrades are allowed.

Onboarding, credits, and the Squawk Accelerator

For teams that want hands-on setup support, SquawkVoice offers the Squawk Accelerator: a $5,000 one-time fee for 30 days of dedicated AI engineer support covering onboarding, workflow design, prompt tuning, integrations, and go-live. This is optional on Growth and Pro. Enterprise includes fully managed onboarding by default.

On the MobileApp side, new accounts can test with up to 50 calls included. A credit card is required, but there are no charges unless you upgrade.

What SquawkVoice includes that Synthflow doesn't:

• Call recordings on every plan (Synthflow: transcripts only on standard plans)
• Structured post-call summaries and logged actions (Synthflow: not available unless you build it)
• Analytics tied to outcomes and resolution trends (Synthflow: actionable outcomes not available out of the box)
• Leadership dashboard with granular call resolution data (Synthflow: holistic agent view only)
• Production-ready agents with no prompt engineering required (Synthflow: setup effort scales with complexity)
• Lead tracking in the analytics dashboard (Synthflow: not tracked)
• Multiple authentication profile options (Synthflow: limited by user role)

The real cost calculation. At 1,000 minutes/month, Synthflow PAYG runs roughly $140 vs. SquawkVoice Growth at $200. That $60 gap narrows when you factor in: the time cost of building and tuning Synthflow agents, the operational overhead of manually reviewing transcripts for call outcomes, and any add-ons (Performance Routing and Low Latency Edge together add $0.08/min to Synthflow's base rate).

‍

Head-to-head: how Synthflow compares on key capabilities

Pricing is only half the story. Before committing to either platform, it’s worth understanding what you’re getting for the money beyond call minutes. We compared Synthflow and SquawkVoice across 18 capabilities:

Source: SquawkVoice internal competitor analysis, Synthflow evaluation sheet (2025)

The quick marketing comparison

At a higher level, here’s how the two platforms scored on the five capabilities that matter most to buyers:

Source: SquawkVoice marketing comparison matrix (2025)

The pattern is clear: Synthflow earns full marks on the core capability (handling calls autonomously) but falls short on readiness, ease, visibility, and UX. That’s the trade-off of a builder-first platform — you get power and flexibility, but you’re paying for it in setup time and operational overhead.

Side-by-side comparison: Synthflow vs. SquawkVoice

Synthflow vs. SquawkVoice: which has better pricing?

Best for building custom voice agents and workflows

Synthflow. If you want to design agent behavior from scratch — custom call flows, conditional branching, multi-step logic, outbound campaigns — Synthflow’s builder is where you need to be. You can create unlimited agents, test different configurations, and iterate without subscription friction.

The cost of that flexibility is time. Our evaluation found that Synthflow requires “a lot of time and effort to search through the setup options” and that calendar integrations specifically are “not straightforward.” The builder is capable, but production-quality agents require tuning, testing, and ongoing maintenance. That is the operational effort your team absorbs.

Best for turnkey call handling with minimal setup

SquawkVoice. If you run a dental office, an HVAC business, or a med spa and need calls answered reliably — with appointment booking, lead capture, and after-hours coverage — SquawkVoice gets you there with less work.

The MobileApp is the clearest expression of this. A small business owner can set it up from their phone and have an AI receptionist live in minutes. The WebApp handles more complex workflows for mid-market teams with backend integrations (including Freshworks), but it’s still designed around production-ready agents rather than open-ended building.

The post-call experience is a real differentiator here. SquawkVoice provides summaries and structured actions after every call — your team knows what happened and what to do next without having to review transcripts. Synthflow gives you transcripts but no call recordings and no actionable summaries unless you customize them yourself.

Best for agencies and white-label reselling

Synthflow. It offers sub-accounts, Stripe-based client billing, white-label branding with a custom domain, and a full reseller toolkit. On a pay-as-you-go basis, this costs $2,000/month. On Enterprise, it’s included.

SquawkVoice does not offer white-label or agency features. If reselling voice AI under your own brand is part of your business model, Synthflow is the only option between these two.

The UX and setup gap: what the data shows

Price matters, but so does the daily experience of managing your AI agents. There are consistent UX gaps in Synthflow that affect the real cost of running the platform:

Source: SquawkVoice competitor analysis, Synthflow Raw Data evaluation (2025)

Synthflow wins on raw voice variety (1,000+ options vs. 20+) and knowledge base input flexibility (PDF, document, URL). SquawkVoice wins on everything related to daily usability — menu structure, agent management, workflow design, and the time it takes to go from “I want an AI agent” to “it’s handling calls.”

Hidden costs and gotchas to watch

Synthflow

• Phone numbers cost $1.50/month each. Every agent needs one—ten agents = $15/month before any call volume.
• Performance Routing and Global Low Latency Edge each add $0.04/min. Both enabled pushes your effective rate past $0.20/min on most configurations.
• The headline $0.09/min voice engine cost is not your total cost. Add LLM and telephony before comparing to any other platform.
• White-label tools cost $2,000/month on a pay-as-you-go basis.
• No call recordings on the standard plan — only transcripts. If your compliance or QA process requires recordings, you’ll need to build that yourself.
• The Starter plan has been removed. The $29/month entry point that some review sites reference no longer exists.
• Actionable post-call summaries and analytics tied to outcomes are not available out of the box.

‍

SquawkVoice

• The Squawk Accelerator is $5,000 upfront. For smaller businesses testing the platform, that’s a real commitment.
• Pro requires a $1,000/month minimum. That only makes economic sense above roughly 5,500 minutes/month.
• Standard plans are annual contracts. There is no monthly billing option.
• The $0.20/min Growth rate is higher than Synthflow’s entry point on paper, though the all-inclusive pricing means fewer variables to track.

See exactly what $0.20/min gets you. No advanced math skills required.

Request a Demo →

How to choose the right plan

If you’re just testing or running a pilot

Both platforms allow low-commitment starts. Synthflow’s pay-as-you-go plan has no subscription — you pay for usage as you go. SquawkVoice Growth charges $0.20/min with no monthly commitment. The Mobile App includes 50 free calls.

At this stage, the more important question is: how long does it take to get an agent who actually handles your calls well? Our evaluation found SquawkVoice’s guided setup with templates requires no prompt engineering, while Synthflow’s “setup effort increases with workflow complexity.” Build a test agent on each, run real call scenarios, and evaluate.

If you handle 1,000–10,000 minutes per month

At 1,000 minutes/month, Synthflow PAYG at ~$0.14/min averages around $140. SquawkVoice Growth at $0.20/min comes to $200. SquawkVoice Pro at $0.18/min costs $1,000 (the minimum commitment), which only makes sense if your volume is consistently above 5,500 minutes.

At 5,000 minutes/month, Synthflow PAYG runs roughly $700. SquawkVoice Growth hits $1,000. SquawkVoice Pro also costs $1,000 at the commitment level, but now includes Slack support and continuous monitoring — features that Synthflow does not offer at any level below Enterprise.

At 10,000 minutes/month, enterprise tiers converge. Synthflow Enterprise at ~$0.08/min would run approximately $800. SquawkVoice Enterprise at $0.09/min comes to about $900. The price difference is marginal. The real differentiator at this volume is what’s included: Synthflow’s self-build model versus SquawkVoice’s managed optimization with structured post-call data.

Cost comparison at volume

Note: Synthflow PAYG estimate assumes GPT-4.1 mini + Synthflow-managed Twilio ($0.13/min) with some calls on GPT-4.1 ($0.16/min). Actual costs vary by configuration.

On a per-minute cost basis, Synthflow is cheaper across all volume tiers. But the comparison shifts when you factor in what’s included: SquawkVoice’s pricing covers call recordings, structured post-call summaries, outcome-driven analytics, and production-ready agents. With Synthflow, you’re paying less per minute but absorbing the cost of building, tuning, and maintaining those features yourself.

If you need a fully managed voice AI operation

SquawkVoice Enterprise is built around this. Fully managed onboarding, dedicated support, and continuous improvement in resolution rate are included in the tier — not available as paid extras. The Squawk Accelerator adds 30 days of hands-on AI engineering for teams that want to move fast at launch.

Synthflow Enterprise includes onboarding, training, and a dedicated solution architect. But the platform still expects your team to build and maintain agent workflows. It’s a powerful toolkit, not a managed service.

If you have the engineering resources or an agency partner handling the build, Synthflow works. If you’d rather hand that to the vendor and focus on running your business, SquawkVoice is the more practical choice.

Conclusion

Synthflow earns its position for teams that want to build and own their voice AI workflows. The no-code builder is flexible, agency features are mature, and the component-based pricing can be cost-effective at scale if you manage configurations carefully. The entry point is lower on paper.

But the total cost of ownership includes more than per-minute rates. Our evaluation found gaps in post-call visibility (no actionable summaries), call recordings (not available on standard plans), analytics (actionable outcomes not available), and UX (complicated menus, unintuitive navigation). Those gaps translate into operational effort your team must absorb.

SquawkVoice earns its position for businesses where the phone is a revenue channel and every missed call has a cost. Flat per-minute pricing removes the guesswork. Production-ready agents reduce time to value. Structured post-call data means your team knows what happened on every call without manually review transcripts.

The fastest way to decide: run a real call scenario on both platforms with content you already have. The one that handles your actual calls with less effort and fewer surprises is the right answer.

Run a real call scenario and see the post-call data for yourself. Request a Demo →

Frequently asked questions

Does Synthflow have a free plan?

No permanent free plan. Synthflow’s pay-as-you-go tier has no subscription fee, but you pay for every minute of usage. You’ll also need at least one phone number ($1.50/month) to make or receive calls. The previously available Starter plan at $29/month has been discontinued.

What is the difference between Synthflow’s pay-as-you-go and Enterprise plans?

Pay-as-you-go is self-serve with component-based billing, 5 concurrent calls, and ticketing support. Enterprise adds custom per-minute rates, unlimited concurrency, SIP trunking, white-label tools, HIPAA compliance, a 99.99% uptime SLA, and dedicated support with a solution architect.

How does SquawkVoice’s Annual Credit Pool work?

If you don’t use all your committed minutes in a given month, the unused value rolls into an Annual Credit Pool. You can draw on those credits during busier months later in the year. There are no penalty rates — any additional usage beyond your commitment is billed at the same per-minute rate.

Which is better for agencies: Synthflow or SquawkVoice?

Synthflow. It offers sub-accounts, Stripe-based client billing, white-label branding with a custom domain, and a reseller toolkit. SquawkVoice does not currently offer agency or white-label features.

Does Synthflow include call recordings?

No. Synthflow provides transcripts but no call recordings on the standard plan. If your compliance or QA process requires recordings, you’ll need to build that capability yourself or look at platforms like SquawkVoice, which include recordings on all plans.

What should I check to avoid surprise costs with voice AI billing?

Look beyond the per-minute headline. For Synthflow, add the voice engine, LLM, and telephony costs together, then check whether you need Performance Routing or Low Latency Edge (each adds $0.04/min). Factor in $1.50/month per phone number per agent. For SquawkVoice, note that Pro requires a $1,000/month commitment (annual contract) and the optional Accelerator is $5,000. Growth has no commitment but carries a higher per-minute rate than Synthflow’s base configuration.