AgentVoice vs Synthflow

AgentVoice

AgentVoice has turned from a $0.10-per-minute self-serve platform into a done-for-you voice agency, so it now suits companies that want someone else to scope, build and tune their phone agents. Teams that want to sign up and build an agent themselves on a metered plan should go to Vapi or Retell directly, since every AgentVoice engagement starts with a sales call.

Pros

• +Platform licence is a one-time fee with no per-minute platform charge; usage is billed at provider cost
• +Engine can run in the client's Azure or AWS account with the code in their own GitHub organisation
• +Builds on whichever platform the client already uses: Vapi, Retell, ElevenLabs, Bland or Synthflow
• +Each agent is tested on real calls before launch and tuned afterwards

Cons

• −No public price for custom builds or the licence; every option goes through sales
• −The self-serve plan with free credit and per-minute billing is no longer on the pricing page
• −Changes after launch are billed hourly or on retainer

Synthflow

Synthflow targets companies and BPOs that want to automate a real volume of phone calls with testing and QA around the agents. Small businesses wanting a cheap receptionist bot, or developers wanting pay-per-minute experiments, will find the $30,000 entry point too high.

Pros

• +Own telephony network as well as SIP trunking
• +Built-in simulated-call testing and automatic QA
• +Visual flow builder plus API and CRM integrations
• +Covers both voice and chat agents

Cons

• −No published self-serve plan or per-minute rate
• −Minimum annual contract of $30,000
• −Pricing depends on scoping with sales

Is AgentVoice cheaper than Synthflow?

Synthflow starts at $30000/yr; AgentVoice prices on request, so a quote is the only way to compare.

Which has a public API, AgentVoice or Synthflow?

Both ship a public API, so either can be built on; the fact table above shows the platforms each one runs on.