RexaThe short answer
These are different purchasing models more than different products. Synthflow states that enterprise contracts start at 30,000 US dollars annually, with final pricing custom-scoped to call volume, concurrency, telephony and integrations. Rexa.ai publishes a 10¢ per-minute rate with no contract and a 20 US dollar minimum top-up. If you need procurement, an MSA and a scoped implementation, Synthflow is built for that. If you want to launch this week and pay for what you use, Rexa is.
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Rexa.ai and Synthflow at a glance
| Rexa.ai | Synthflow | |
|---|---|---|
| Entry commitment | No contract. 20 US dollar minimum top-up; 100 is the first bonus tier | Enterprise contracts start at 30,000 annually |
| Published rate | 10¢ per minute, all-inclusive | Not published; custom-scoped per contract |
| How you buy | Self-serve signup | Contact sales; custom scoping |
| Telephony | Phone numbers included; bring-your-own supported | Native telephony, SIP trunking, or approved enterprise telephony |
| Implementation support | Self-serve with documentation; enterprise terms available at volume | Implementation, onboarding, testing, training and launch support included in contract |
| Time to first call | Same day, self-serve | Contract and scoping first |
Who Synthflow suits better
Synthflow is the better fit if you are an enterprise buyer who needs a scoped implementation, an MSA and DPA, a security review, and named launch support — and whose budget cycle already accommodates an annual contract.
Who Rexa.ai suits better
Rexa.ai is the better fit if you want to test with real calls before committing budget, need a published rate you can model, and do not want to enter a procurement cycle to place your first call.
Frequently asked questions
- Does Synthflow publish per-minute pricing?
- Not as of the access date below. Synthflow’s pricing page states that enterprise contracts start at 30,000 US dollars annually and that final pricing is custom-scoped to call volume, concurrency, telephony setup, integrations, security needs and launch support. Per-minute rates, included minutes and overage terms are not published.
- Can I try Rexa.ai without a contract?
- Yes. Rexa.ai is self-serve with no contract and no monthly commitment. The only floor is on funding the account: the smallest top-up is 20 US dollars. You then pay 10¢ per minute of conversation, and prepays of 100 or more earn bonus credit that lowers the effective rate.
Scope, limitations, and sources
Synthflow does not publish per-minute rates, included minutes, or overage terms, so this comparison cannot state an effective per-minute cost for Synthflow, and no such figure is implied. The 30,000 annual figure is the published contract floor, not a quote. Enterprise buyers should compare a scoped Synthflow quote against modelled Rexa.ai usage at their own volume rather than relying on either headline number.
Sources
- Synthflow enterprise contracts starting at $30,000 annually, custom scoping factors, and the included telephony and implementation terms. synthflow.ai (accessed )
- Rexa.ai per-minute rate and what it includes. rexa.ai (accessed )
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