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The Best Synthflow Alternative for Agencies
Wave Runner is a white-label voice AI platform for agencies at $999/mo + $0.10/min with no-code setup, unlimited agents, and a multi-client dashboard. Synthflow is a no-code voice AI platform with base costs of $0.13–$0.16/min all-in, a $2,000/mo white-label add-on, and standard plans capped at 1,000 daily calls.
Synthflow has a genuinely accessible no-code builder. Non-technical teams can get an agent live without writing code, which is a real advantage over developer-first platforms like Retell and Vapi.
The problem for agencies is what happens when you need white-label and scale. White-label is a separate $2,000/mo fee on top of all usage. Standard plans cap at 1,000 calls per day. Multiple Trustpilot reviews describe pricing changes applied mid-contract.
Here's where Synthflow fits and where it doesn't.
What Is Synthflow?
Synthflow is a no-code voice AI platform with a drag-and-drop visual builder and 200+ integrations.
Pricing
All-in cost runs $0.13–$0.16/min. Broken down:
- ●Voice engine: $0.09/min
- ●LLM: $0.02–$0.05/min
- ●Telephony: ~$0.02/min
- ●Low-latency mode (add-on): $0.04/min extra
- ●White-label (separate add-on): $2,000/mo
- ●Concurrency expansion: $20/slot/mo
An agency at 5,000 minutes with white-label pays $2,650–$2,800/mo total.
Strengths
- ●Genuinely accessible no-code visual builder
- ●Series A funded, TechCrunch coverage
- ●200+ integrations
- ●~400–420ms latency on paid low-latency mode
What's missing for agencies
- ●White-label costs $2,000/mo extra — not included at any tier
- ●Standard plans cap at 1,000 daily calls across the entire account
- ●Concurrency expansion costs $20/slot/mo beyond included limits
- ●Slack support cut off after 30 days on non-enterprise plans
- ●Multiple documented pricing changes applied mid-contract
*Sources: Synthflow pricing | Synthflow G2 reviews*
What Is Wave Runner?
Wave Runner is a white-label voice AI platform built for agencies running multiple clients. The pricing, dashboard, and support are all designed around the agency resale model.
Pricing
- ●$999/mo flat platform fee + $0.10/min
- ●One invoice — no component stacking, no separate add-ons
- ●At 13 clients: ~$77/client. At 20 clients: $50/client. At 50 clients: $20/client.
White-label
- ●Custom domain, your logo, client-facing dashboards with no Wave Runner branding
- ●Included on every plan — no $2,000/mo add-on, no enterprise gate
Multi-client management
- ●Unlimited workspaces and agents — no daily call cap
- ●Single dashboard across all clients with per-client reporting, call recordings, and transcripts
- ●New clients live in under an hour, no developer needed
Integrations and performance
- ●13 native integrations: HighLevel, HubSpot, Twilio, Slack, Gmail, Cal.com, Google Sheets, Notion, Webhooks, HTTP Request, OpenAI, Gemini, Anthropic
- ●Sub-800ms latency, RAG knowledge base, multilanguage support, live call transfer
Support
- ●Private Slack channel and dedicated account manager for every partner — not a 30-day trial
Side-by-Side Comparison
| Feature | Wave Runner | Synthflow |
|---|---|---|
| Starting price | $999/mo + $0.10/min | Usage-based + add-ons |
| All-in cost/min | $0.10 | $0.13–$0.16 |
| White-label | Included | $2,000/mo add-on |
| Billing | One invoice | Usage + add-on fees |
| Latency | Sub-800ms | ~420ms (paid mode) |
| Multi-client dashboard | Yes | Agency plan only |
| Workspaces/agents | Unlimited | Plan-limited |
| No-code setup | Yes | Yes |
| Daily call cap | None | 1,000/day (standard) |
| Concurrency | No surcharge | $20/slot add-on |
| Inbound + outbound | Yes | Yes |
| Live call transfer | Yes | Yes |
| Knowledge base (RAG) | Yes | Yes |
| Support | Private Slack + AM | Ticket (30-day Slack) |
| Best for | Agencies, MSPs, BPOs, VoIP | Solo operators, low-volume testing |
Pricing: The White-Label Gate
Synthflow's most agency-relevant feature — white-label — costs $2,000/mo on top of usage. That's not a plan upgrade. It's a separate line item.
| Volume | Wave Runner | Synthflow (no WL) | Synthflow (with WL) |
|---|---|---|---|
| 1,000 min/mo | $1,129 | ~$150 | ~$2,150 |
| 5,000 min/mo | $1,499 | ~$700 | ~$2,700 |
| 10,000 min/mo | $1,999 | ~$1,400 | ~$3,400 |
| 20,000 min/mo | $2,999 | ~$2,800 | ~$4,800 |
For agencies that need white-label, Synthflow is more expensive than Wave Runner at every volume level.
Pricing stability
Multiple Trustpilot reviews describe plan changes mid-contract. Synthflow removed its $29/mo Starter plan without notifying existing customers. One Reddit user in 2025: "Synthflow rates aren't accurate, they hit me with a bait and switch... Feels like the whole platform is crippled unless you're paying enterprise."
The Daily Call Cap Problem
Standard plans cap at 1,000 calls per day across the entire account. For solo operators running a simple answering setup, that's fine. For agencies running campaigns across multiple clients, 1,000 total daily calls isn't workable.
Concurrency expansion costs $20 per slot per month. Scaling to 10 additional concurrent lines adds $200/mo — on top of the $2,000/mo white-label fee — on top of usage.
Wave Runner has no daily call cap and no per-slot concurrency fees.
No-Code: Where Synthflow Has an Advantage
Synthflow's visual builder is genuinely good. For non-technical teams testing simple inbound flows — appointment booking, after-hours answering, basic lead screening — it's fast to get started.
Wave Runner is also no-code. The difference is in scale and pricing. Wave Runner's no-code covers unlimited clients on one invoice. Synthflow's no-code is accessible at low volume but gets expensive fast once white-label and concurrency expansion are added.
When Synthflow Might Fit
- ●Solo operator, no white-label needed. Testing simple call flows at under 1,000 minutes per month without resale requirements. The no-code builder is the easiest way to get started.
- ●Single client, low volume. Managing one client's answering system at under 1,000 calls/day works fine on standard plans.
- ●Evaluating the category. Synthflow's funding and 200+ integrations make it a reasonable starting point before committing to a platform built for scale.
Agencies managing 5+ clients with white-label requirements consistently find that the $2,000/mo add-on and daily call cap break the economics before the platform delivers.
Where Wave Runner Wins
- ●White-label included at every tier — no $2,000/mo add-on
- ●No daily call cap — run real campaigns without artificial ceilings
- ●No per-slot concurrency fees
- ●Single invoice regardless of how many clients you run
- ●Platform fee falls per client as you scale
- ●Private Slack channel and dedicated account manager from day one
- ●Stable pricing — no plan removals without notice
FAQ
Is Wave Runner cheaper than Synthflow?
For agencies that need white-label (most agencies), yes. Synthflow's $2,000/mo white-label add-on makes it more expensive than Wave Runner at every volume level. Without white-label, Synthflow's usage-only pricing can be lower at small volumes.
Does Synthflow have a multi-client dashboard?
Synthflow has an agency plan with some multi-client features, but the full experience is gated behind enterprise pricing. It's not the same level of consolidated client management that Wave Runner provides across all plans.
Can Synthflow handle outbound campaigns at scale?
Standard plans cap at 1,000 daily calls across the account. For outbound campaigns across multiple clients, that's a hard constraint. Scaling beyond it requires concurrency add-ons at $20/slot/mo, which compounds costs quickly.
How does latency compare?
Synthflow's published latency is 400–420ms on the low-latency paid mode, which is faster than Wave Runner's sub-800ms. In practice, both are within the range where conversations feel natural. Latency is not the deciding factor for most agency deployments.
What if I'm already using Synthflow?
Migrating is straightforward. Agent prompts, knowledge base content, and phone numbers all transfer. The main work is reconfiguring integrations. Most agencies complete the migration within a few days and immediately cut the $2,000/mo white-label add-on.
The Bottom Line
Synthflow's no-code builder is genuinely accessible, and the Series A funding and 200+ integrations are real. For solo operators testing simple call flows at low volume, it's a reasonable starting point.
For agencies building voice AI as a service line, the economics break fast. White-label at $2,000/mo on top of usage, daily call caps, and documented pricing instability make it expensive and unreliable at scale.
Wave Runner is built for the agency model: white-label included, no call caps, one flat invoice, and a platform fee that gets more efficient with every client you add.
If you're running an agency and want to see how the multi-client dashboard works with your specific client mix, book a discovery call. No pitch deck. Just the product.