In June 2026, Synthflow discontinued its tiered SMB plans and moved enterprise-only, with a $30,000/year ($2,500/month) minimum and per-minute billing starting at $0.11/min. Read the full pricing breakdown here.
If you're an AI voice agency that relied on Synthflow, or you're evaluating platforms right now, here's what just happened and what you should do about it.
Why This Matters for AI Voice Agencies
Synthflow's move is the latest signal in a market consolidation: platforms that win are going upmarket. Vapi evaluated 40+ vendors before Amazon Ring picked them for 100% of inbound calls. Bland AI just raised $50M Series C and is enterprise-only. NEXQA (no, not us, a different vendor) is chasing Fortune 500 integrations.
For agencies with 1-10 clients, this leaves you shopping in an increasingly narrow list.
But the real problem isn't Synthflow's pivot. It's the per-minute pricing model that comes with it.
When you bill per-minute, the economics flip: the vendor wins when calls run long, loop, or fail to transfer. You lose. As one analysis put it:
"Per-minute vendors profit when calls run long and when the bot loops, while you absorb the cost of every failed automation.", Famulor AI Voice Pricing Analysis
For an agency running collections campaigns (long calls, sometimes looped), that's a margin killer. For one running appointment-setting (shorter calls, higher success rate), it works, but you're still paying the vendor when your bot loops twice trying to find a transfer.
Flat-rate pricing inverts the incentive. You care about efficiency. The vendor cares that you hit your campaign goals. Margins stay in your pocket.
What We're Doing at Hermes About It
Hermes is the operating platform for AI voice agencies. One platform, no API keys, no duct-taped stack, no per-minute surprises.
Pricing locked flat-rate:
- Starter: $149/month, 300 included minutes, $0.24/min overage
- Business: $399/month, 1,000 included minutes, $0.24/min overage
- Agency: $699/month, 2,000 included minutes, $0.24/min overage
- Pro: Custom for 20+ clients or custom workflows
No component-based billing. No enterprise minimums. No forced upsells to "professional" plans when you add your third client.
Built in: white-label portal under your domain. Native CRM for contacts and deals. Campaign orchestration for outbound + inbound. Transparent usage reporting (no gotchas). A2P compliance built in (DNC checking, consent tracking, submission automation).
Margin math:
- You charge your client $2,000/month for a voice campaign.
- You run 2,500 minutes/month on Hermes Agency plan ($699).
- You pocket $1,301. Margin: 65%.
Same campaign on Synthflow at $0.13/min? 2,500 minutes = $325 base + setup fees. But loops, transfers, retries push it to $450/month. You pocket $1,550, until one campaign runs long (happens 30% of the time) and suddenly overage costs are $300. Margin: 55% on a good month, 40% on a bad one.
Hermes lets you sell with confidence: your costs don't surprise you, and your margins stay yours.
Action Steps for Agencies Affected
If Synthflow was your main platform:
Export your agents. Synthflow's API still works. Pull your agent configs, prompts, and call logs before June 30 (companies always give migration windows). Save them as JSON.
Test on Hermes. Build one existing agent on Hermes in 72 hours. Use our demo agents to see the white-label portal your clients would see. No CC required, fire up a free trial.
Run a shadow campaign. Pick one of your smaller clients. Route 500 calls through Hermes while keeping your Synthflow agent live. Compare cost, call quality, and completion rate for one week. Data beats feelings.
Price the switch. If Hermes lands at $149-399/month vs. Synthflow's $30k/year enterprise minimum, the decision makes itself. Your clients notice too.
Migrate on your timeline. No rush. Agencies that switched in the last 60 days report a 6-week transition per agent, with zero downtime if you run parallel for 2 weeks.
Three FAQs
Q: Does Hermes support my use case? (collections, appointment setting, surveys, etc.)
A: Hermes powers outbound campaigns (collections, sales, surveys), inbound (voicemail-to-text, transfers), and hybrid. NEXQA (our AI backbone) handles complex branching, transfers, and fallbacks. If Synthflow could do it, Hermes can. Check our feature matrix for a side-by-side.
Q: What if I have 50+ clients? Does Hermes scale?
A: Yes. Enterprise plan starts at custom pricing for 20+ clients and custom workflows. Our largest customer manages 180 clients and 500k+ calls/month. Dedicated onboarding, SLA, and priority support included.
Q: Can I white-label Hermes for my own clients?
A: Completely. Every client sees your brand, your domain, your logo, your phone numbers. They never see "Hermes" unless you tell them. Margin stays with you. See how white-label works.
Why This Matters Beyond Pricing
Synthflow's pivot to enterprise reflects a broader market truth: 1,000 indie agencies are building AI voice businesses with DIY stacks. They're duct-taping Retell + GoHighLevel + Zapier + Stripe + Twilio + a developer. That costs $8k-15k/month just to operate. Most never professionalize, they're trapped between "MVP that works" and "enterprise platform that costs $30k+."
Hermes exists in that gap. Built by founders who ran AI voice agencies, not by ex-enterprise sales teams chasing billion-dollar unicorns.
We're not trying to be Vapi (API-first for developers). We're not trying to be Synthflow (enterprise automation). We're building the operating layer agencies actually use every day.
Per-minute billing goes away. Multi-tenant workspace ops stay. White-label stays. Margins stay yours.
Start Today
Your clients need voice AI. The question is: do you run it on a platform that works for you, or a platform that works despite you?
Book a private walk-through of Hermes (20 min, no pressure). We'll port one of your existing agents and show you the real cost math.
Or start free: Create a Hermes workspace and build your first agent in 72 hours. We'll give you a complete onboarding, no secrets, no trial-version crippling.
By builders, for builders. Let's ship.
Alfredo Romero
CEO, Hermes
AI voice agencies deserve a platform built for them, not for enterprises.
Originally published at buildwithhermes.com/blog/synthflow-upmarket-hermes-2026-07-28.
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