When drag-drop stops scaling, switch to a spec
Synthflow gets you live fast with a no-code canvas. VoiceForge is what agencies switch to when they need repeatable, reviewable, white-label delivery — agents as versioned specs, not canvas files.
From canvas to contract
Synthflow stores layout. VoiceForge stores a Zod-validated Agent Spec JSON — goals, flow, tools, compliance policy, handoff rules — so a change is a diff you can review, test and roll back.
Test before telephony, every time
Run a full browser test call: transcript, event stream, tool activity and outcome. Publish only the version you tested — no “it worked in the builder” surprises on live calls.
Provider-neutral by design
ElevenLabs handles STT, conversation reasoning, and TTS behind one runtime interface. The agent definition stays in VoiceForge and survives a provider change.
White-label without the add-on
Every client gets an isolated workspace with your logo and colors. Keep margin, keep branding, keep data isolated — without enterprise negotiation.
When Synthflow is the right call
Choose Synthflow when you want the fastest no-code canvas and $0.06/min overages fit your volume. Choose VoiceForge when you sell many governed client deployments and need reviewable, auditable delivery.
Questions, answered.
Why switch from Synthflow to VoiceForge?
Synthflow is excellent for no-code drag-drop at $79-$199/mo plus ~$0.06/min overages. Teams switch to VoiceForge when they need agents as versioned, reviewable contracts rather than canvas layouts — Zod-validated Agent Spec JSON, diffable versions, audit logs and compliance gates that survive team turnover.
Is VoiceForge no-code too?
Yes for the happy path: describe the caller experience in natural language, get a full Agent Spec, edit the visual flow if needed, then test in the browser. The difference is the artifact: a portable spec, not a proprietary canvas file.
How does white-label compare?
Synthflow offers white-label as a paid tier. Retell requires Call Supplai for it. VoiceForge ships white-label workspaces by default: isolated per client, branded, with scoped analytics and users.
What about latency?
Synthflow and Retell publish their own latency figures. VoiceForge runs calls on ElevenLabs behind a provider adapter, keeps agent logic in Agent Spec JSON, and records latency and call events in the transcript stream.
Hear the difference.
Then build your own.
Start with a free workspace. Review your agent. Test before you publish.