Synthflow alternatives: what to use now that Synthflow is enterprise-only
Synthflow's pricing page now states that enterprise contracts start at $30,000 annually, with no self-serve tiers published. If you came for the cheap no-code voice builder, the closest replacements are Retell AI for builders, Bland for a single all-in rate, ElevenLabs Agents for the lowest entry price, and a packaged AI receptionist if you never wanted a builder.
Disclosure, before anything else
Disclosure: TrainYourAgent — the company publishing this page — is one of the options in the table below, because a done-for-you build is a genuine answer to 'Synthflow got expensive'. We have written a 'when we would not pick this' section about ourselves alongside every other option, and we have not put ourselves first in any ordering on this page.
The options, and the losing case for each
Retell AI — Component-priced voice platform with the most generous free concurrency. Best for: The closest like-for-like replacement if you were using Synthflow to build agents rather than to buy one. Pay-as-you-go with no platform fee, a published $0.07–$0.31/min envelope, 20 concurrent calls and 10 knowledge bases included free, and $10 of credit to test with. Someone who was comfortable in Synthflow's builder will be productive here within a day. Not for: Anyone who chose Synthflow specifically because they did not want to think about a stack. Retell shows you the seams — infrastructure, TTS engine, LLM and telephony are four separate published rates — and that transparency is the same thing as complexity if you did not want it.
Bland AI — One all-in per-minute rate covering model, transcription and speech. Best for: Replacing a Synthflow plan with a single legible number. $0.14/min on the free Start tier with no platform fee and no card, dropping to $0.12/min on a $299/mo plan. If what you liked about Synthflow was the flat monthly bill, this is the nearest emotional equivalent. Not for: Outbound campaigns at any scale. The daily call caps are hard: 100/day on Start and 2,000/day on Build. Also not for anyone who needs a specific model or a specific cloned voice — the integration that makes the rate all-in is the thing that removes the choice.
Vapi — Thin orchestration fee over bring-your-own model keys. Best for: Teams that have grown past a no-code builder and now have opinions about models. $0.05/min platform fee, models at cost or $0 with your own keys, 10 concurrent lines included. This is where a Synthflow graduate goes when the constraint they hit was control rather than price. Not for: The person who was using Synthflow because they are not an engineer. Vapi is the most assembly-required option here and it will not be faster than what you had.
ElevenLabs Agents — Conversational agents from the voice vendor, with the lowest published entry price. Best for: The cheapest legitimate way to have a voice agent at all. The Starter plan is $6/mo with 75 included minutes and 6 concurrent calls; Creator is $22/mo with 275 minutes and 10 concurrent calls. Included call minutes are priced at $0.080/min. If your volume is genuinely small — a solo practitioner, a side business, a proof of concept — nothing else on this page comes close on entry cost, and the voice quality is the best of the set by some distance. Not for: Anyone whose volume is going to grow, because the ladder gets steep: Pro is $99/mo for 1,238 minutes and Scale is $299/mo for 3,738. Also not for anyone who needs deep telephony control, since LLM and telephony are billed separately and at cost on top.
A packaged AI receptionist — A finished product rather than a builder — Rosie, Goodcall, Smith.ai and similar. Best for: The large share of Synthflow users who never actually wanted a builder. If the job is 'answer the phone, take a message, book an appointment, text me', a product that already does that costs less and takes an afternoon. Rosie's Professional plan is $49/mo for 250 minutes; Smith.ai's AI receptionist has a free tier at 25 calls/month. Not for: Any workflow that is not receptionist-shaped. The moment you need the agent to read from your own database, run a multi-step qualification, or behave differently for three different call types, a packaged product runs out of room and you are back to a builder.
TrainYourAgent (done-for-you build) (ours) — We build and operate the agent on one of the platforms above, on your behalf. Best for: Operators who were using Synthflow because it was the cheapest way to avoid hiring an engineer, and who have now discovered that the no-code builder still needed an engineer's attention every week. We pick the platform, do the conversation design, wire the integrations and tune it against real calls. Our published pricing is on our pricing page and it is a monthly retainer, not a per-minute rate. Not for: Anyone whose monthly voice volume is under a few hundred minutes — the retainer will not pay for itself and ElevenLabs Agents at $6/mo or Rosie at $49/mo is straightforwardly the better purchase. Also not for teams with an in-house engineer who wants to own this; you would be paying us to do work you can do, and you will be faster than us because you know your own systems. And not for anyone who needs a live agent this week: a done-for-you build is measured in weeks, not days.
Entry pricing for Synthflow replacements, read off each vendor's own pricing page on 23 August 2026.
Synthflow (for reference) — Entry price: Enterprise contracts start at $30,000 annually; Per-minute economics: Not published; Included concurrency: Not published; Replaces Synthflow for: Enterprise buyers only
Retell AI — Entry price: $0 — pay as you go, $10 free credit; Per-minute economics: $0.07–$0.31/min quoted envelope; Included concurrency: 20 calls free; Replaces Synthflow for: Builders
Bland AI — Entry price: $0 Start (no card) · $299/mo Build; Per-minute economics: $0.14/min · $0.12/min on Build; Included concurrency: 10 Start · 50 Build; Replaces Synthflow for: Flat-bill buyers
Vapi — Entry price: $0.05/min platform fee, no minimum published; Per-minute economics: Fee + models at cost ($0 with own keys); Included concurrency: 10 lines, $10/line/mo after; Replaces Synthflow for: Model-opinionated teams
ElevenLabs Agents — Entry price: $6/mo Starter · $22/mo Creator; Per-minute economics: $0.080/min on included call minutes; Included concurrency: 6 Starter · 10 Creator; Replaces Synthflow for: Very small volumes
Rosie (packaged receptionist) — Entry price: $49/mo Professional; Per-minute economics: 250 minutes included in the plan; Included concurrency: Multiple simultaneous calls, no published cap; Replaces Synthflow for: People who wanted a product
TrainYourAgent (done-for-you) — Entry price: See our published pricing page; Per-minute economics: Retainer, not per-minute; Included concurrency: Sized to your peak in the build; Replaces Synthflow for: People who wanted the work done
Footnotes on that table
ElevenLabs Agents bills LLM and telephony separately and at cost on top of the plan; the $0.080/min figure is the included-call rate, not an all-in rate.
We have deliberately not published a TrainYourAgent price in this table. Our pricing is published on our own pricing page and it is a retainer with a scope, which is not comparable to a per-minute rate and would be misleading in a per-minute column.
What exactly changed at Synthflow?
As of 23 August 2026, Synthflow's pricing page publishes one tier: Enterprise, with the statement that enterprise contracts start at $30,000 annually, scoped around call volume, concurrency, telephony setup, integrations, security needs and launch support. There are no self-serve tiers, no published per-minute rate, no published included minutes, and no published white-label or agency plan. This is a normal and defensible move for a company that has found its market in mid-market and enterprise deployments. It is also a complete change in who the product is for. Synthflow spent its first years as the answer to 'I want a voice agent and I am not an engineer and I do not want to spend much', and that is no longer a description of the product you can buy. If you are reading a comparison article that still lists Synthflow with a two-figure monthly price, that article has not been checked. This is exactly the failure mode that a visible verified-on date is supposed to prevent, which is why every price on this page carries one.
If you were using Synthflow as a builder, what is the closest replacement?
Retell AI, for most people. It is pay-as-you-go with no platform fee, it publishes every component rate rather than hiding them, and it includes twenty concurrent calls and ten knowledge bases at no charge — which is more free capacity than Synthflow's old entry tiers offered. There is $10 of credit to test with, so the migration can be evaluated before it is committed. Bland is the alternative if what you valued was the single flat number. Its Start tier is $0.14/min with no platform fee and no card required, and the Build plan at $299/mo brings it to $0.12/min with fifty concurrent calls and a 2,000-call daily ceiling. The rate covers the language model, transcription and speech synthesis with no token pass-throughs, which is the closest thing in this market to the predictability of an old Synthflow plan. Vapi is the right answer only if the constraint you hit with Synthflow was control rather than cost. At $0.05/min plus models at cost — or $0 for models if you bring your own keys — it is the cheapest at high volume and the most work at any volume.
If you were using Synthflow as a product, what should you buy instead?
A packaged AI receptionist, almost certainly. A large fraction of Synthflow's self-serve users were not building anything: they wanted the phone answered, a message taken, an appointment booked and a text sent. That is a product category with real products in it, and they are cheaper than any builder. Rosie's Professional plan is $49/mo for 250 minutes with custom message-taking and spam detection; its Scale plan is $149/mo for 1,000 minutes and adds calendar booking, warm transfers and live transfers. Smith.ai publishes a free AI receptionist tier covering 25 calls a month, then $3.00 per call, with a Pro plan at $150/mo. Goodcall prices per unique caller rather than per minute — $79/mo per agent on Starter, or $66/mo billed annually — with unlimited minutes and tokens, which is a genuinely different and sometimes much better shape of pricing for a business with a small number of repeat callers. The full comparison of that category, with every price checked the same day as this one, is on our AI receptionist services page.
Is ElevenLabs Agents actually usable as a Synthflow replacement?
For small volumes, yes, and it is the cheapest entry point on this page by a wide margin. Starter is $6/mo with 75 included minutes and 6 concurrent calls. Creator is $22/mo with 275 minutes and 10 concurrent calls. Included call minutes are priced at $0.080/min, additional call minutes at $0.003/min, and burst pricing at $0.160/min. The catch is the shape of the ladder. Pro is $99/mo for 1,238 minutes, Scale is $299/mo for 3,738 minutes, and Business is $990/mo for 12,375 minutes. That is roughly $0.08/min all the way up, which is competitive — but it means the monthly commitment steps in large jumps rather than scaling smoothly, and you pay for minutes you did not use. LLM and telephony are billed separately and at cost on top. Where it genuinely wins is voice quality, which is not a small thing for a customer-facing agent, and where it genuinely loses is telephony depth. If your requirement includes complex transfer trees, multi-number routing or carrier-level control, this is not the tool.
When would we not pick TrainYourAgent for this?
We are one of the options on this page, so this section is about us and it is written with the same standard as the others. Do not hire us if your volume is small. Under a few hundred minutes a month, a retainer cannot be justified by the arithmetic, and ElevenLabs Agents at $6/mo or Rosie at $49/mo will do the job for a rounding error. We would rather tell you that than take the engagement. Do not hire us if you have an engineer who wants this. They will move faster than we will for the first month because they already know your systems, and the handover cost of teaching us those systems is real. Our value shows up in the second and third months, in tuning and failure analysis, not in the build. Do not hire us if you need it live this week. A packaged product goes live in an afternoon. A done-for-you build does not, and any agency that tells you otherwise is describing a demo rather than a deployment. Do not hire us if what you want is the cheapest possible per-minute rate. We are not the cheapest per minute and we do not claim to be; we are a way of not spending your own weeks on conversation design and endpointing tuning. If those weeks are cheap for you, buy the platform directly.
Figures we deliberately did not publish
Synthflow's per-minute rates, included minutes, assistant counts and white-label pricing. None are published on its pricing page as of 23 August 2026; only the $30,000 annual enterprise floor is.
Any 'legacy Synthflow plan' pricing. Existing customers may be on grandfathered terms, but those terms are not published and we will not guess at them.
Price log — what was read, and where
Synthflow: Enterprise contracts start at $30,000 annually; no self-serve tiers published — read from https://synthflow.ai/pricing on 2026-08-23. MAJOR CHANGE. Synthflow previously sold self-serve tiers in the tens of dollars per month. It no longer publishes any.
Retell AI: $0.07–$0.31/min; 20 concurrency free; 10 knowledge bases free; $10 signup credit — read from https://www.retellai.com/pricing on 2026-08-23
Bland AI: $0.14/min Start, no card · $0.12/min + $299/mo Build (50 concurrency, 2,000 calls/day) — read from https://www.bland.ai/pricing on 2026-08-23
Vapi: $0.05/min platform fee; models at cost or $0 with own keys; 10 concurrency included — read from https://vapi.ai/pricing on 2026-08-23
ElevenLabs Agents: Starter $6/mo (75 min, 6 concurrent) · Creator $22/mo (275 min, 10) · Pro $99/mo (1,238) · Scale $299/mo (3,738) · Business $990/mo (12,375); included calls $0.080/min — read from https://elevenlabs.io/pricing/agents on 2026-08-23
Rosie: Professional $49/mo (250 min) · Scale $149/mo (1,000 min) · Growth $299/mo (2,000 min) — read from https://heyrosie.com/pricing on 2026-08-23
Goodcall: Starter $79/mo per agent ($66 annual) · Growth $129 ($108) · Scale $249 ($208); unlimited minutes and tokens; $0.50 per unique customer over the tier threshold — read from https://www.goodcall.com/pricing on 2026-08-23
Smith.ai (AI receptionist): Free $0 for 25 calls/mo then $3.00/call · Pro $150/mo · Enterprise $500/mo — read from https://smith.ai/ai-receptionist on 2026-08-23
How much does Synthflow cost in 2026?
Synthflow's pricing page states that enterprise contracts start at $30,000 annually and publishes no self-serve tiers, no per-minute rate and no included-minute figures. Pricing is scoped around call volume, concurrency, telephony setup, integrations, security needs and launch support. If you need a published number below that, Synthflow is no longer the product for you.
What is the cheapest Synthflow alternative?
ElevenLabs Agents at $6/mo for the Starter plan with 75 included minutes and 6 concurrent calls, if your volume is genuinely small. For a builder rather than a product, Retell AI is $0 to start with $10 of free credit and pay-as-you-go usage after that. For a receptionist product, Smith.ai publishes a free tier covering 25 calls a month.
Is Retell a drop-in replacement for Synthflow?
Functionally close, but not drop-in. Prompts and call flows port with moderate rewriting, integrations need redoing, and endpointing tuning has to be redone from scratch because it is expressed differently. Budget two weeks and run it in parallel against live traffic rather than switching over on a planned date.
Does anything replace Synthflow's white-label agency plan?
Not directly with published pricing. Synthflow no longer publishes white-label or agency tiers, and neither Retell, Bland nor ElevenLabs publishes a white-label price on its pricing page. Agencies in this category are currently either negotiating unpublished terms or building on a bring-your-own-key platform like Vapi and white-labelling their own layer on top.