Quick verdict
TL;DR: Synthflow builds AI voice agents that answer and make phone calls for businesses — support, sales, booking and follow-up — and in 2026 it has gone fully enterprise. Its own pricing page lists one plan: Enterprise, with contracts starting at $30,000 a year, scoped to your call volume and setup. There is no self-serve tier and no per-minute rate card anymore. If you run a serious call operation, the bundled, sales-led package may suit you. If you are a small team that remembers Synthflow’s old $29/month plans, that product no longer exists — look at usage-priced rivals instead.
Bottom line: Synthflow is now an enterprise call-automation contract, not a tool you sign up for. Budget $30,000 a year or shop elsewhere.
What does Synthflow actually do?
Synthflow is an end-to-end voice AI platform for automating phone calls. You deploy AI agents that handle inbound and outbound calls — answering support questions, qualifying and following up with leads, booking appointments — with custom routing, escalation paths, human handoffs and fallback logic when a call goes off script. Synthflow says its platform powers over 65 million voice calls a month across 30+ countries, and it carries 1,000+ reviews on G2.
The enterprise packaging is the product now. Per its pricing page, a contract bundles Synthflow’s native telephony (or SIP trunking, or your approved enterprise carrier), custom concurrency planning, and integrations with your CRM, calendar, contact-center stack, webhooks, APIs and knowledge sources. Implementation is included: onboarding, testing, training, launch support and ongoing optimization, with an enterprise SLA and support terms scoped in the contract, plus MSA/DPA and security review support.
That is a very different animal from the developer-first voice platforms we have covered — Vapi sells per-minute platform access you assemble yourself, and Retell AI prices agents by the minute with self-serve signup. Synthflow’s bet is that a large call operation would rather buy one scoped contract than stitch together telephony, speech, language-model and support bills.
How much does Synthflow cost in 2026?
Open Synthflow’s pricing page today and there is exactly one box:
| Plan | Price | What sets the final price |
|---|---|---|
| Enterprise | Contracts start at $30,000/year | Call volume, concurrency, telephony setup, integrations, security needs, launch support |
Everything else older reviews quote — the per-month Starter, Pro, Growth and Agency tiers, and per-minute self-serve rates — no longer appears on Synthflow’s own pricing page. Do not budget from those stale listings. There is also no published free plan or self-serve trial on the pricing page: the call to action is “Contact Sales,” and the final number is scoped per deal. For cost transparency on a smaller scale, our Deepgram review shows the opposite model — published per-minute speech pricing you can calculate before talking to anyone.
What are Synthflow’s strengths?
- One contract, whole stack: telephony, agents, integrations, security review and launch support are bundled and scoped together, instead of five separate vendor bills.
- Built for real call operations: custom concurrency, routing, escalation and fallback logic are first-class contract items, not add-ons you discover later.
- Proven at volume: Synthflow’s stated 65M+ calls a month in 30+ countries and 1,000+ G2 reviews indicate a platform that has survived production use.
- Implementation is included: onboarding, testing, training and ongoing optimization come with the deal — valuable when a failed call is a lost customer.
What are Synthflow’s weaknesses?
- The $30,000 floor prices out most teams: small businesses, agencies and startups — the audience Synthflow’s old plans served — cannot start here at any price.
- No self-serve way to test it: no free plan, no published trial, no rate card. Your evaluation starts with a sales process and ends with a scoped quote.
- Opaque final pricing: the real cost depends on six scoping factors, so two similar companies can pay very different amounts, and neither can comparison-shop from the website.
- Annual enterprise commitment: this is a contract with an SLA, MSA and DPA — the opposite of a month-to-month tool you can cancel after a pilot week.
Who is Synthflow for?
Contact centers, healthcare and financial-services operations, franchises and other businesses whose phone volume is large enough that a $30,000 annual floor is a rounding error against staffing costs — and who need the compliance paperwork, security review and launch support an enterprise contract carries. Everyone else — solo operators, small sales teams, developers prototyping a voice agent — should start with a usage-priced platform and revisit Synthflow only when call volume justifies a contract.
Verdict
Judged as what it now is, Synthflow is a coherent enterprise offer: a proven voice-agent platform with telephony, integrations and implementation wrapped into one scoped contract. Judged as what it used to be — an accessible no-code voice tool — it is simply gone, and older reviews quoting $29/month are describing a dead product. If your call operation spends six figures a year on phone work, a Synthflow conversation is reasonable. If it doesn’t, your shortlist is Vapi, Retell AI and their peers, priced by the minute with the math on the website.
Frequently asked questions
How much does Synthflow cost?
Enterprise only: contracts start at $30,000 annually, per Synthflow’s own pricing page checked October 26, 2026. The final price is scoped around call volume, concurrency, telephony setup, integrations, security needs and launch support.
Does Synthflow have a free plan or trial?
No free plan or self-serve trial is published on its pricing page. The only route in is contacting sales for a scoped Enterprise contract.
What happened to Synthflow’s $29/month plans?
They no longer appear on Synthflow’s pricing page, which now lists a single Enterprise plan. Third-party listings still quoting the old Starter, Pro, Growth or Agency tiers are stale.
What are the best Synthflow alternatives for smaller teams?
Usage-priced voice platforms with self-serve signup — Vapi and Retell AI are the closest equivalents we have reviewed — let you start small and pay per minute instead of committing to an annual enterprise contract.
Prices checked October 26, 2026, against Synthflow’s own pricing page.