Best Synthflow Alternatives (2026)
Synthflow's pricing page says enterprise contracts start at $30,000 a year, scoped by call volume, concurrency, telephony, integrations and security needs. If you'd rather start on pay-as-you-go, the alternatives below publish self-serve pricing: Retell AI at $0.07–$0.31/min with $10 in free credits and a no-code flow builder, Vapi at $0.05/min hosting with models at cost, Bland AI at one all-in $0.14/min rate, ElevenLabs Agents at $0.08/min plus LLM with 15 free minutes a month, and Ultravox at a flat $0.05/min after 30 free minutes. Prices are from each vendor's own pricing page.
Synthflow is now sold on annual enterprise contracts. If you want to start small, every pick below lets you sign up and pay per minute, no contract needed.
Retell AI, Vapi, Bland AI, ElevenLabs Agents and Ultravox compared with Synthflow on published pricing, for teams that don't want a $30,000/year contract.
| Tool | Starting price | Best for |
|---|---|---|
| $0 platform fee; $0.07–$0.31/min for voice agents | Teams that want a no-code flow builder plus an API with itemized per-minute pricing | |
| $0 to start; $0.05/min Vapi hosting, models billed pass-through at cost | Developers who want to choose their own LLM, transcriber, voice and telephony provider | |
| $0.14/min, $0 platform fee | Teams that want one flat per-minute price with no model pass-through bills | |
| Agents: $0.08 per minute | Builders who want ElevenLabs' voices and speech models in one agent pipeline | |
| $0.05/min (first 30 min free) | Developers wanting a speech-native model at a flat per-minute rate |
What to check before you choose
- Price your real volume first. $30,000 a year is $2,500 a month; at Bland's all-in $0.14/min that buys nearly 18,000 minutes, so many small and mid-size teams spend less on a per-minute platform. Above that, an enterprise contract's custom concurrency and launch support may be worth it.
- If no-code was why you picked Synthflow, look at Retell first: it pairs a no-code flow builder with an API. Vapi, Bland, Ultravox and ElevenLabs are more developer-oriented, though ElevenLabs includes a workflow builder on every plan.
- Compare the whole minute. Bland's $0.14/min includes LLM, transcription and voices; Ultravox's $0.05/min includes its speech model; Vapi's $0.05/min and Retell's $0.055/min voice infrastructure add model costs on top; ElevenLabs bills LLM usage separately from its $0.08/min.
- Check concurrency on self-serve plans: Retell includes 20 concurrent calls, ElevenLabs 4 (Free) to 40 (Business), Bland Start 10 with a 100 calls/day cap, Ultravox pay-as-you-go 5, and Vapi 4 to start.
- Need HIPAA? Retell offers a BAA without an enterprise contract; Vapi sells a $2,000/mo HIPAA add-on; Bland and ElevenLabs list BAAs on Enterprise. Get the BAA signed before patient data hits the line.
Not sure which fits? Answer a few quick questions in the finder →
Prices from vendors' official pricing pages, checked October 17, 2026. Not sponsored; order isn't a ranking.