Synthflow Pricing and Synthflow AI Cost per Year

How much does Synthflow cost?

Synthflow costs at least $30,000 a year. That is the only figure on synthflow.ai/pricing, which reads "Enterprise contracts start at $30,000 annually. Final pricing is scoped around call volume, concurrency, telephony setup, integrations, security needs, and launch support." The only buttons on the page are Contact Sales and Get a demo.

Spread over twelve months, the floor is $2,500 a month. It is a commitment rather than a monthly plan: the Synthflow docs describe Enterprise pricing as a "sales-led annual agreement", and say included usage, carryover and overage terms are set in that agreement. So the honest answer to how much Synthflow costs is $30,000 a year plus whatever your call volume and concurrency add once a sales rep scopes them.

The billing docs go one step further and tell readers "do not use public documentation as a quote." That matters if you are building a business case from a review site. A number you did not get from Synthflow in writing is not a Synthflow price.

Does Synthflow still have a $29 plan?

No. The plans most reviews still list, Starter at $29 and Pro, Growth and Agency at monthly prices into the low thousands, are closed. Synthflow's concurrency documentation says it directly: "Earlier Pro, Growth, and Agency plans were issued with fixed concurrency limits. These plans are no longer available for new subscriptions and remain supported for existing customers."

When we checked the top ten results for "synthflow pricing" on October 5, 2026, only Synthflow's own page and one competitor review led with the $30,000 Enterprise figure. Directory pages and comparison posts dated as recently as September 2026 still present the $29 tier, a $0.08 or $0.09 per minute pay as you go rate and a $2,000 white label fee as if you could buy them today. Synthflow's own 2025 blog post on voice AI cost still says "starting at $0.08/min", which is where much of the confusion comes from.

If a teammate shares one of those numbers, treat it as a legacy price. You will not be offered it on a new account.

How Synthflow bills an outbound calling campaign

Synthflow publishes its metering rules even though it does not publish its rates, and for a cold calling team those rules decide how fast an allowance drains.

Calls are measured per second, with partial seconds rounded up, then added together and invoiced in whole minutes. The detail that matters for outbound: calls that end as no-answer or hang up on voicemail "are recorded as a flat 5 seconds of usage". Failed and user-canceled calls are not billed.

Cold lists are mostly unanswered. Our arithmetic on those rules: a campaign of 20,000 dials where 15,000 ring out or hit voicemail records 75,000 seconds, about 1,250 minutes, before a single conversation happens. That is not a reason to avoid Synthflow, but it belongs in the volume you hand the sales rep, because included usage in the contract is sized on minutes.

Two more rules from the same docs. Billing thresholds "are triggers, not spending caps", so a busy month generates an extra invoice rather than a stop. And Synthflow stops measuring AI usage at the point of a transfer, so a warm handoff to a rep ends the AI meter.

Can Synthflow make outbound calls at volume?

Yes, but campaigns are an Enterprise feature that support switches on. The batch calling docs say "Campaigns are available on our Enterprise plans. Reach out to our support team to activate them on your account."

How fast a campaign dials is limited by two numbers in your contract: concurrency, the number of calls live at once, and CAPS, the number of call attempts started per second. Both are "scoped with Synthflow" for Enterprise accounts. Go over the limit and, in the docs' words, "excess calls can return a 429 HTTP error or be queued briefly." There is a reserved concurrency setting that holds slots back for inbound and one-off calls, which also means those slots are not dialing your list.

For a team planning outbound, ask for the concurrency figure in writing before you sign. A $30,000 contract with four concurrent lines and one with forty are different products.

What $30,000 a year buys at other voice AI vendors

Our arithmetic on the published rates, dated October 5, 2026, using $2,500 a month as the like for like budget:

Bland Start at $0.14 a minute, which includes the model, transcription and voices: about 17,850 minutes a month. Bland's Start plan caps you at 100 calls a day, so a real outbound program needs Build or Scale, where $2,500 less the $499 Scale fee buys about 18,190 minutes at $0.11.

Retell at its $0.07 to $0.31 published range: between roughly 8,060 and 35,700 minutes a month, depending almost entirely on the language model, plus telephony if you do not bring your own.

Vapi at $0.05 a minute for hosting: 50,000 minutes of platform time, but models, voices and telephony are billed at cost on top, so the real figure is far lower and depends on your stack.

All three are build-it-yourself platforms. You still write the call flow, the qualification logic, the compliance checks and the CRM handoff. We compare the per-minute stacks line by line in our AI voice agent pricing breakdown, and the developer-focused options on Vapi pricing, Retell AI pricing and Bland AI pricing.

Is Synthflow worth $30,000 a year for cold calling?

It can be, for a specific buyer. Synthflow's Enterprise package bundles things a large operation genuinely needs: an SLA, SIP trunking or native telephony, contact center integrations, a data processing agreement and security review, a HIPAA business associate agreement for US healthcare use, white label for agencies when it is in your setup, and hands-on implementation. If you run a contact center with inbound and outbound lines, several brands and a procurement process, that is a reasonable package.

It is a poor fit for a sales team that wants an outbound program running this month. The price is committed for a year before you know your connect rate, campaigns need support to activate them, and the platform is a builder, so the call script, objection handling and booking logic are still your team's project. We cover that trade in more depth on the Synthflow alternative page, including where Synthflow is the better buy.

The question to answer first is what you are actually buying. If it is a voice agent platform, compare Synthflow with Vapi, Retell and Bland. If it is booked meetings from cold outbound, compare it with an AI SDR that already does that job.

Synthflow vs an AI SDR seat for a sales team

For a US team of three to ten reps that wants first touch calls made and meetings booked, the comparison is a committed annual floor against a flat monthly seat.

Synthflow: from $30,000 a year, sales-led, with outbound campaigns, concurrency and usage set in the contract, and the agent built by your team or Synthflow's implementation staff.

ColdCalls.ai: Growth is $1,490 a month for 3 AI SDR seats and about 6,000 connected minutes, or $745 a month billed yearly, which is $8,940 for the year. Scale is $3,900 a month for 10 seats and about 20,000 connected minutes, or $23,400 billed yearly. Both prices are on our pricing page, and both are below the Synthflow floor on a yearly bill.

The difference that matters more than the price is the job. Our agent is already an outbound SDR: it discloses that it is AI, scrubs DNC, respects state calling windows, handles the first objections, qualifies against your criteria and books onto your reps' calendars. You configure it rather than build it. If you need a general voice agent for inbound support, appointment reminders and outbound in one platform, Synthflow is the closer fit.