Pay As You Go
Usage-based pricing with no commitments
Usage-based pricing with no commitments
Pay As You Go (PAYG) is designed for builders, pilots, and small-scale deployments. Explore the platform at no cost, then pay only for the calls and chats you make.
Every PAYG workspace includes:
You also get full access to the Synthflow Academy and community forum.
Once you add a payment method, your workspace is subscribed to the PAYG plan at $0.00 per month. You’re only charged when you:
Call billing has two parts: LLM-based billing (the rate depends on which language model you use) and the voice engine (your transcriber and synthesizer providers). Combined, effective rates typically fall between $0.15–0.24 per minute depending on usage and destination. Learn more about how usage is calculated.
In practical terms, PAYG is best when you want low commitment and predictable access to the product, while accepting that your exact spend scales with call volume, model choice, and telephony usage.
Once your balance reaches US$200, we’ll charge your card and send you an invoice. This keeps charges manageable instead of building up over time.
Expand your workspace capabilities with add-ons available in Settings > Add-Ons.
PAYG includes 5 concurrency units by default, allowing up to 5 simultaneous calls. Additional units cost $20 per month each.
Scale concurrency as your volume grows without renegotiating contracts or changing plans. This is ideal for businesses with fluctuating call volumes or seasonal spikes.
Learn more about call concurrency.
The white-label toolkit is available for $2,000 per month. It enables:
This add-on is designed for agencies reselling Synthflow to their own clients.
Learn more about agency and white-labeling.
Purchase phone numbers directly in the Phone Numbers page. Options include:
Each number costs $1.50 per month plus per-minute charges for calls. Review pricing before confirming and assign numbers to specific agents.
Learn more about purchasing phone numbers.
We’re expanding the PAYG add-on catalog to include:
PAYG works well for most use cases, but you may want to consider Enterprise if you need:
Compare plans on our pricing page or contact sales to discuss your requirements.
There’s no time-limited trial. You can explore the platform, build agents, use the flow designer, add knowledge bases, and preview voices without a payment method. Once you add a payment method and start making calls or using chat, usage-based charges begin.
None. PAYG is month-to-month with no contracts. You can cancel anytime from the Billing Portal.
Yes. Contact our sales team to discuss upgrading. Your usage history and agents transfer seamlessly.
Go to Settings > Add-Ons and purchase additional concurrency units at $20/month each.
Yes. The white-label toolkit is available as a $2,000/month add-on. You don’t need Enterprise to white-label.
Additional calls will be queued or may fail to connect. Monitor your concurrent call usage and add more units if you regularly hit limits.
PAYG has standard rates. For volume discounts and committed pricing, consider the Enterprise plan.