Nexa vs Synthflow AI
Synthflow AI publishes its pricing; Nexa does not.
Both pages checked by August 19, 2026
- NexaAI + human backup
- Pricing not published
- no published plan
- People-powered 24/7 call answering, client intake, inbound and outbound sales and live chat/text service for home services, healthcare, legal and real estate businesses, with an optional Voice + AI agent that can hand calls off to human agents.
- Synthflow AIAI only
- $2500/mo
- Enterprise plan
- Enterprise voice AI platform with in-house telephony for automating inbound and outbound calls, sold through sales-scoped contracts rather than published self-serve plans, with the agent designed, tested and launched by the customer in Synthflow's Flow Designer or Prompt Builder.
The differences that matter
- Nexa is ai + human backup; Synthflow AI is ai only. That is the real decision here, not the price.
- Nexa can put a human on the line; Synthflow AI is bot-only.
- Synthflow AI offers a trial (Yes, you can start and build your AI agent for free using our library of industry templates or build your own. You can design custom call flows, set up voicemail detection, and configure integrations without any upfront cost. When you are ready to launch your Agent, you start to use a Pay-As-You-Go (PAYG) model: you only pay for the actual calls and chats conducted.); Nexa advertises none.
- Synthflow AI publishes prices. Nexa makes you ask.
Feature by feature
| Capability | Nexa | Synthflow AI |
|---|---|---|
| Live transfer | Yes | Yes |
| Books appointments | Yes | Yes |
| Text follow-up | Yes | Yes |
| Outbound calls | Yes | Yes |
| Spanish | Yes | Yes |
| Human backup | Yes | No |
| Call recordings | unstated | Yes |
| Transcripts | unstated | Yes |
| Spam screening | unstated | unstated |
| Custom voice | unstated | Yes |
| API | unstated | Yes |
"unstated" means the vendor doesn't claim it in their own documentation. It is not the same as no — it means nobody will put it in writing.
Nexa plans
| Plan | Published price | Includes | Over that |
|---|---|---|---|
| Nexa 100 | not published | 100 min | If you go over the minute allowance for any given billing cycle, every additional minute will be charged at your base rate. |
| Nexa 300 | not published | 300 min | If you go over the minute allowance for any given billing cycle, every additional minute will be charged at your base rate. |
| Nexa 500 | not published | 500 min | If you go over the minute allowance for any given billing cycle, every additional minute will be charged at your base rate. |
Synthflow AI plans
| Plan | Published price | Includes | Over that |
|---|---|---|---|
| Enterprise | Enterprise contracts start at $30,000 annually(annual billing) | — | — |
Nexa sources
- Plans page (Nexa 100/300/500 minute allowances and per-tier feature lists; no prices, quote request only)nexa.com · read August 19, 2026
- Pricing page (no dollar amounts; overage described as "charged at your base rate"; setup fee described but not priced)nexa.com · read August 19, 2026
- Terms and Conditions (whole-minute rounding rounded up, what counts as billable time, non-refundable one-time setup fee, month-to-month auto-renewal, 1-month written cancellation notice, AI Agent billed per Service Plan, call recording)nexa.com · read August 19, 2026
- FAQ (bilingual English/Spanish answering; "combination of people and AI-powered solutions"; named CRM and field-service integrations; confirms no published pricing, trial, or billing detail)nexa.com · read August 19, 2026
- Voice + AI product page (AI handles answering, booking, scheduling and support; escalates to a human agent; human-first or AI-first configurable; calls answered in under 30 seconds; no pricing)nexa.com · read August 19, 2026
- About page (founded 1982 as Answer 1 Communications, rebranded Nexa 2019, Phoenix AZ HQ at 2001 W Camelback Rd #400, additional offices, industries served)nexa.com · read August 19, 2026
- Nexa's own cost article, checked for first-party prices: publishes only generic industry ranges, not Nexa's own ratesnexa.com · read August 19, 2026
Synthflow AI sources
- Pricing page (Enterprise-only; "Enterprise contracts start at $30,000 annually"; scoping variables and contract inclusions)synthflow.ai · read August 19, 2026
- Homepage (positioning, target industries, free-trial FAQ answer and PAYG statement)synthflow.ai · read August 19, 2026
- Docs: Billing Overview ("Synthflow uses sales-led pricing", legacy billing labels, do-not-quote-from-docs warning)docs.synthflow.ai · read August 19, 2026
- Docs: Usage and Billing (per-second measurement, minute aggregation with carryover, flat 5s for no-answer, call-state billing table, chat at 5 AI messages per minute, allowances and carryover)docs.synthflow.ai · read August 19, 2026
- Docs: Concurrency (concurrency vs CAPS, "Scoped with Synthflow", no published defaults)docs.synthflow.ai · read August 19, 2026
- Docs: Languages (transcribers Deepgram and Synthflow STT, full supported-language list)docs.synthflow.ai · read August 19, 2026
- Docs: Integrations overview (GoHighLevel, Salesforce, HubSpot, Zendesk, Freshworks, Cal.com, Stripe, WhatsApp, ElevenLabs, Zapier, Make, Bubble, OpenAI/Anthropic/Azure BYOK, telephony)docs.synthflow.ai · read August 19, 2026
- Docs: Logs (call recordings and transcripts, live monitoring, CSV export, opt-out of saving recordings)docs.synthflow.ai · read August 19, 2026
- Docs: Getting started (BELL framework — the customer builds, evaluates and launches)docs.synthflow.ai · read August 19, 2026
- Docs: Custom pricing / reseller plans (Stripe reselling deprecated September 15, 2026; configurable subaccount plans, included minutes, concurrency caps, trials up to 200 minutes)docs.synthflow.ai · read August 19, 2026
- Docs index (call transfer TEL/SIP/dynamic, real-time booking, post-call SMS, in-call SMS/WhatsApp messaging, campaigns/batch calling, IVR handling, telephony and SIP integrations, Platform API)docs.synthflow.ai · read August 19, 2026
- Imprint (operating entity AgentFlow AI GmbH, Kurfürstendamm 15, 10719 Berlin; HRB 255004 B)docs.synthflow.ai · read August 19, 2026