Synthflow · Alternatives · Checked Oct 27, 2026
Synthflow alternatives after the move to enterprise-only pricing
Synthflow now lists one option: enterprise contracts from $30,000/year, with no self-serve plan. Pay-as-you-go alternatives are Retell AI ($0.055/min voice infra, $0/month), Bland AI ($0.14/min bundled) and GoHighLevel Voice AI ($0.045/min engine), the fit for agencies on client sub-accounts. Checked Oct 27, 2026.
Synthflow alternatives at a glance
| # | Platform | From | Monthly fee | At 1,000 min | vs Synthflow | Concurrency |
|---|---|---|---|---|---|---|
| 1 | Synthflow Current | Not published | $30,000 /year | Not published | — | Not published |
| 2 |  Deepgram Voice Agent API | $0.075 /min | Pay as you go | $84.65 | — | 45 |
| 3 |  Retell AI | $0.055 /min | $0 /mo | $99.80 | — | 20 |
| 4 |  GoHighLevel Voice AI | $0.045 /min | $97 /mo | $100.00 | — | Not published |
| 5 |  ElevenLabs Agents | $0.08 /min | $0–$990 /mo | $102.45 | — | 4–40 |
| 6 |  Vapi | $0.05 /min | $0–$29 /mo | $110.80–$157.90 | — | 4 / 10 / 30 |
| 7 |  Bland AI | $0.14 /min | $0–$299 /mo | $149.65 | — | 10–50 |
At 1,000 minutes on our stated stack. Vapi is a range. Sorted by the low end, with the current tool pinned first. Monthly or plan fee Sources: retellai.com · Oct 27, 2026; vapi.ai · Oct 27, 2026; bland.ai · Oct 27, 2026; elevenlabs.io · Oct 27, 2026; help.gohighlevel.com · Oct 27, 2026; deepgram.com · Oct 27, 2026; synthflow.ai · Oct 27, 2026
Synthflow pricing in 2026: what changed
| Item | Value |
|---|---|
| Minimum contract | $30,000/year |
| Self-serve plans | none |
| Reselling ended | Sep 15, 2026 |
| Billing increment | per-second, aggregated into whole minutes; no-answer/voicemail hangup = flat 5 s; 5 AI chat msgs = 1 min |
| Price per minute | Not published (contact sales) |
| Concurrency included | Not published (contact sales) |
| Telephony | Not published (contact sales) |
| Free tier or trial | Not published (contact sales) |
Sources: synthflow.ai · Oct 27, 2026; docs.synthflow.ai · Oct 27, 2026; docs.synthflow.ai · Oct 27, 2026
We do not quote older per-minute plan prices. They are not on Synthflow’s current pages, so we cannot verify them.
Synthflow alternatives compared by cost
Synthflow’s per-minute rate is not published, so it is not a row in this table. Scenario (our assumptions, not vendor figures): inbound calls on one US local number; average call 3 minutes; the business needs 10 calls at once; a GPT-4.1-mini-class LLM; each platform's cheapest published voice. Where a platform bills the LLM by token and publishes no per-minute figure, we use Retell's published GPT 4.1 mini rate ($0.0128/min) as a stand-in and label it assumption.
| Platform | 500 min | 1k min | 5k min | 10k min | $/min @1k |
|---|---|---|---|---|---|
| Retell AI | $50.90 | $99.80 | $491.00 | $980.00 | $0.0998 |
| Vapi | $69.90 to $93.45 | $110.80 to $157.90 | $438.00 to $673.50 | $847.00 to $1,318.00 | $0.1108 to $0.1579 |
| Bland AI | $75.40 Start | $149.65 Start | $743.65 Start | $1,585.15 Build | $0.1497 |
| ElevenLabs Agents | $51.80 Creator | $102.45 Creator | $507.61 Pro | $1,014.11 Pro | $0.1024 |
| GHL Voice AI, speech-to-speech | $50.00 | $100.00 | $500.00 | $1,000.00 | $0.10 |
| GHL Voice AI, engine + TTS + LLM | $36.40 | $72.80 | $364.00 | $728.00 | $0.0728 |
| Deepgram Voice Agent API | $42.90 | $84.65 | $418.65 | $836.15 | $0.0847 |
Scenario: 10 concurrent calls, 3-minute inbound calls, one US number. 500 min/mo. 1,000 min/mo. 5,000 min/mo. 10,000 min/mo. Per min at 1,000 Sources: retellai.com · Oct 27, 2026; vapi.ai · Oct 27, 2026; bland.ai · Oct 27, 2026; elevenlabs.io · Oct 27, 2026; help.gohighlevel.com · Oct 27, 2026; deepgram.com · Oct 27, 2026
For reference, $30,000/year is $2,500.00 a month. That is more than every alternative above at 10,000 minutes on our stack.
Retell AI
$0.055/min voice infra, 20 concurrent calls included. At 1,000 minutes: $99.80. Synthflow's comparable per-minute figure is not published, so there is no difference to compute. Retell AI pricing.
Vapi
$0.05/min hosting. At 1,000 minutes: $110.80–$157.90. Vapi pricing.
Bland AI
$0.14/min bundled on Start. At 1,000 minutes: $149.65. Bland AI pricing.
ElevenLabs Agents
Extra minutes $0.08/min. At 1,000 minutes: $102.45. ElevenLabs Agents pricing.
Try ElevenLabs AgentsAffiliate link
GoHighLevel Voice AI
Engine $0.045/min. Agency Starter is $97/month. The vendor note on that fee is 3 sub-accounts. At 1,000 minutes on speech-to-speech: $100.00, phone excluded. GoHighLevel Voice AI pricing.
Start a GoHighLevel free trialAffiliate link
Deepgram Voice Agent API
At 1,000 minutes: $84.65, telephony included as your own Twilio. Synthflow’s per-minute rate is not published, so this is not a difference versus Synthflow.
Moving from Synthflow: what changes on your bill
- You leave an annual contract for per-minute or monthly plan billing. The bill moves with volume.
- Concurrency is priced: Retell 20 concurrent calls, Vapi 4 / 10 / 30, Bland Start 10 concurrent; 100 calls/day; 100 calls/hour; 1 voice; 10 KBs, ElevenLabs from 4 concurrent calls up to 40 concurrent calls.
- Telephony may become its own line. Twilio US inbound local is $0.0085/min, numbers $1.15/month.
- Reselling ended on Sep 15, 2026. GoHighLevel's agency plans are the nearest published replacement for client sub-accounts.
How we picked
Published prices only. Synthflow stays out of the cost table because its per-minute rate, concurrency, telephony and free tier are not published. Rank is cost and fit. Retell, ElevenLabs and GoHighLevel have affiliate programs. Vapi’s applications are on hold. Bland and Synthflow have no public rate we can join. Open the calculator.
FAQ
Does Synthflow still have pay-as-you-go?
No. Synthflow's pricing page lists no self-serve plan. Contracts start at $30,000/year.
How much does Synthflow cost?
From $30,000/year. Synthflow does not publish per-minute rates, concurrency or telephony; they are set in the contract.